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Caplash S, Paez-Escamilla M, Westcott M, Dansingani KK, Indermill C, Kisma N, Frau E, Sahel JA, Bodaghi B, Jhanji V, Errera MH. Mimickers of anterior uveitis, scleritis and misdiagnoses- tips and tricks for the cornea specialist. J Ophthalmic Inflamm Infect 2024; 14:14. [PMID: 38594487 PMCID: PMC11004105 DOI: 10.1186/s12348-024-00396-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2023] [Accepted: 03/29/2024] [Indexed: 04/11/2024] Open
Abstract
BACKGROUND Anterior uveitis, inflammation of the anterior chamber and related structures, is a cohort of diseases that can present to almost any general or sub-specialty Ophthalmology practice. Its features classically involve anterior chamber cell and flare. Below the surface of these two signs exist a panoply of diagnoses. BODY: The purpose of this review is to provide a general framework for diagnoses of anterior uveitis that are often missed as well as non-uveitic pathologies that often mimic anterior uveitis. Diagnostic deviation in either direction can have vision-threatening and rarely life-threatening consequences for patients. Using a comprehensive literature review we have collected a broad spectrum of etiologies of anterior uveitis that are easily missed and non-uveitic pathologies that can masquerade as anterior uveitis. CONCLUSIONS We present a focused review on specific misdiagnosed anterior uveitis pathologies and some of the conditions that can masquerade as anterior uveitis and scleritis.
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Affiliation(s)
- Sonny Caplash
- Department of Ophthalmology, University of Pittsburgh, 203 Lothrop Street, Pittsburgh, PA, 15213, USA
| | - Manuel Paez-Escamilla
- Department of Ophthalmology, University of Pittsburgh, 203 Lothrop Street, Pittsburgh, PA, 15213, USA
| | - Mark Westcott
- NIHR Biomedical Research Centre for Ophthalmology, Moorfields Eye Hospital NHS Foundation Trust, 162 City Road, London, EC1V 2PD, UK
| | - Kunal K Dansingani
- Department of Ophthalmology, University of Pittsburgh, 203 Lothrop Street, Pittsburgh, PA, 15213, USA
| | - Chad Indermill
- Department of Ophthalmology, University of Pittsburgh, 203 Lothrop Street, Pittsburgh, PA, 15213, USA
| | - Nacima Kisma
- Universite Libre de Bruxelles, Hopital Universitaire de Bruxelles, 808 route de Lennik 1170, Bruxelles, Belgium
| | - Eric Frau
- Department of Ophthalmology, Centre hospitalier National des Quinze-Vingts, Paris, France
| | - Jose-Alain Sahel
- Department of Ophthalmology, University of Pittsburgh, 203 Lothrop Street, Pittsburgh, PA, 15213, USA
| | - Bahram Bodaghi
- Department of Ophthalmology, Pitié-Salpêtrière University Hospital, Sorbonne Universités, F-75013, Paris, France
| | - Vishal Jhanji
- Department of Ophthalmology, University of Pittsburgh, 203 Lothrop Street, Pittsburgh, PA, 15213, USA
| | - Marie-Helene Errera
- Department of Ophthalmology, University of Pittsburgh, 203 Lothrop Street, Pittsburgh, PA, 15213, USA.
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Zhang J, Rong C, Yan C, Chen J, Yang W, Yu L, Dai H. Risk factors of furazolidone-associated fever. PLoS One 2022; 17:e0266763. [PMID: 35395029 PMCID: PMC8993017 DOI: 10.1371/journal.pone.0266763] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2021] [Accepted: 03/27/2022] [Indexed: 11/18/2022] Open
Abstract
Background Furazolidone is a synthetic nitrofuran with a broad spectrum of antimicrobial action and has been widely used in the treatment of Helicobacter pylori (H. pylori) infection. However, its safety profile has not been clarified. Moreover, the drug fever associated with its use is frequently misdiagnosed. The aim of this study was to explore the risk factors of furazolidone-associated fever to increase awareness and stimulate further research on this topic. Methods This was a retrospective case-control study of patients referred to a specialist clinic for furazolidone-containing quadruple regimens for H. pylori infection at a tertiary care hospital located in Eastern China between July 2018 and September 2018. We evaluated adult patients who received furazolidone treatment for Helicobacter pylori infection. The exclusion criteria were as follows: (1) patients were pregnant or breastfeeding; (2) patients received furazolidone treatment not for Helicobacter pylori infection; (3) patients had taken antibiotics or any acid suppressant or non-steroidal anti-inflammatory drug in the last 4 weeks; (4) patients had chronic hepatic, renal, or pulmonary disease. Pertinent information was retrieved from medical records and telephone follow-up. All statistical analysis was performed in SPSS version 22.0. Results A total of 1499 patients received furazolidone and met the overall inclusion criterion. Of these 1499 patients, 27 (1.80%) developed drug fever. The mean time between initiation of furazolidone and the onset of fever is 11.00 ± 1.84 days, and the median peak fever was 38.87 ± 0.57°C. We found no differences in age and past drug allergy between the non-fever and fever groups. Through multiple logistic regression analysis, we found two variables as independent risk factors for furazolidone-associated fever, including gender (OR, 3.16; 95% CI, 1.26–7.91; P = 0.014) and clarithromycin (OR, 4.83; 95% CI, 2.17–10.79; P<0.001). Conclusions This retrospective cohort study identified two risk factors for furazolidone-associated fever, which were female and clarithromycin. We also analyzed the characteristics of drug fever during anti-Helicobacter pylori therapy. However, the underlying mechanisms are uncertain and require further research.
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Affiliation(s)
- Jiali Zhang
- Department of Pharmacy, Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Chunling Rong
- Department of Pharmacy, Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Chenyang Yan
- Department of Pharmacy, Marine Police Hospital, Jiaxing, China
| | - Jie Chen
- Department of Pharmacy, Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Wenjun Yang
- Department of Pharmacy, Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Lingyan Yu
- Department of Pharmacy, Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Haibin Dai
- Department of Pharmacy, Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
- * E-mail:
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3
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Ostroumova OD, Chikh EV, Rebrova EV, Ryazanova AY, Panteleeva LR, Arzhimatova GS, Moshetova LK. [Drug-induced uveitis]. Vestn Oftalmol 2021; 137:94-101. [PMID: 33610156 DOI: 10.17116/oftalma202113701194] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
In recent years, an increasing amount of attention has been paid to medicinal products as possible risk factors in the development of eye diseases. The frequency of diagnosed drug-induced uveitis is growing yearly, which can be attributed to the appearance of new drugs - biological agents (immune checkpoint inhibitors, BRAF and MEK inhibitors, vascular endothelial growth factor inhibitors, tumor necrosis factor-α inhibitors), as well as systemic bisphosphonates and some antiviral drugs. The time interval between the beginning of the drug use and the appearance of uveitis symptoms varies from several days to months. Common symptoms include eye pain, photophobia, the appearance of floating opacities, and reduced vision associated with active inflammatory changes in the retina and optic nerve and outcomes of those inflammations. Timely diagnosis, cancellation of the drug that caused uveitis and appointment of adequate anti-inflammatory therapy in most cases effectively stops the symptoms of the disease, which determines the relevance of attention to the prevalence, pathogenesis, diagnosis and treatment of drug-induced uveitis.
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Affiliation(s)
- O D Ostroumova
- I.M. Sechenov First Moscow State Medical University (Sechenov University), Moscow, Russia.,Russian Medical Academy of Continuous Professional Education, Moscow, Russia
| | - E V Chikh
- I.M. Sechenov First Moscow State Medical University (Sechenov University), Moscow, Russia
| | - E V Rebrova
- I.M. Sechenov First Moscow State Medical University (Sechenov University), Moscow, Russia
| | | | - L R Panteleeva
- I.M. Sechenov First Moscow State Medical University (Sechenov University), Moscow, Russia
| | - G Sh Arzhimatova
- Russian Medical Academy of Continuous Professional Education, Moscow, Russia.,S.P. Botkin City Clinical Hospital, Moscow, Russia
| | - L K Moshetova
- Russian Medical Academy of Continuous Professional Education, Moscow, Russia
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4
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Abdalla Elsayed MEA, Kozak I. Pharmacologically induced uveitis. Surv Ophthalmol 2021; 66:781-801. [PMID: 33440194 DOI: 10.1016/j.survophthal.2021.01.003] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2020] [Revised: 12/31/2020] [Accepted: 01/04/2021] [Indexed: 12/26/2022]
Abstract
Treatments of numerous systemic and local diseases of different etiologies may be accompanied by an unwanted side effect in the form of uveitis. We inform readers about medications that have the potential to cause uveitis and analyze the strength of association of these medications with uveitis. Subsequently, cessation of medication or appropriate treatment can be individualized for each patient for the purpose of preventing further damage to tissue structure and function. Being aware of these associations, physicians may readily identify medications that may cause uveitis and avoid expensive and unnecessary clinical and laboratory testing.
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Affiliation(s)
| | - Igor Kozak
- Moorfields Eye Hospitals UAE, Abu Dhabi, United Arab Emirates.
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5
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Zhang L, Xu X, Badawy S, Ihsan A, Liu Z, Xie C, Wang X, Tao Y. A Review: Effects of Macrolides on CYP450 Enzymes. Curr Drug Metab 2020; 21:928-937. [PMID: 32807049 DOI: 10.2174/1389200221666200817113920] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2020] [Revised: 04/23/2020] [Accepted: 07/03/2020] [Indexed: 11/22/2022]
Abstract
As a kind of haemoglobin, cytochrome P450 enzymes (CYP450) participate in the metabolism of many substances, including endogenous substances, exogenous substances and drugs. It is estimated that 60% of common prescription drugs require bioconversion through CYP450. The influence of macrolides on CYP450 contributes to the metabolism and drug-drug interactions (DDIs) of macrolides. At present, most studies on the effects of macrolides on CYP450 are focused on CYP3A, but a few exist on other enzymes and drug combinations, such as telithromycin, which can decrease the activity of hepatic CYP1A2 and CYP3A2. This article summarizes some published applications of the influence of macrolides on CYP450 and the DDIs of macrolides caused by CYP450. And the article may subsequently guide the rational use of drugs in clinical trials. To a certain extent, poisoning caused by adverse drug interactions can be avoided. Unreasonable use of macrolide antibiotics may enable the presence of residue of macrolide antibiotics in animal-origin food. It is unhealthy for people to eat food with macrolide antibiotic residues. So it is of great significance to guarantee food safety and protect the health of consumers by the rational use of macrolides. This review gives a detailed description of the influence of macrolides on CYP450 and the DDIs of macrolides caused by CYP450. Moreover, it offers a perspective for researchers to further explore in this area.
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Affiliation(s)
- Liyun Zhang
- National Reference Laboratory of Veterinary Drug Residues (HZAU) and MAO Key Laboratory for Detection of Veterinary Drug Residues, Huazhong Agricultural University, Wuhan, Hubei 430070, China
| | - Xiaoqing Xu
- National Reference Laboratory of Veterinary Drug Residues (HZAU) and MAO Key Laboratory for Detection of Veterinary Drug Residues, Huazhong Agricultural University, Wuhan, Hubei 430070, China
| | - Sara Badawy
- National Reference Laboratory of Veterinary Drug Residues (HZAU) and MAO Key Laboratory for Detection of Veterinary Drug Residues, Huazhong Agricultural University, Wuhan, Hubei 430070, China
| | - Awais Ihsan
- National Reference Laboratory of Veterinary Drug Residues (HZAU) and MAO Key Laboratory for Detection of Veterinary Drug Residues, Huazhong Agricultural University, Wuhan, Hubei 430070, China
| | - Zhenli Liu
- National Reference Laboratory of Veterinary Drug Residues (HZAU) and MAO Key Laboratory for Detection of Veterinary Drug Residues, Huazhong Agricultural University, Wuhan, Hubei 430070, China
| | - Changqing Xie
- National Reference Laboratory of Veterinary Drug Residues (HZAU) and MAO Key Laboratory for Detection of Veterinary Drug Residues, Huazhong Agricultural University, Wuhan, Hubei 430070, China
| | - Xu Wang
- National Reference Laboratory of Veterinary Drug Residues (HZAU) and MAO Key Laboratory for Detection of Veterinary Drug Residues, Huazhong Agricultural University, Wuhan, Hubei 430070, China
| | - Yanfei Tao
- National Reference Laboratory of Veterinary Drug Residues (HZAU) and MAO Key Laboratory for Detection of Veterinary Drug Residues, Huazhong Agricultural University, Wuhan, Hubei 430070, China
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6
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Abstract
Drug-interaction issues continue to present a major dilemma for the clinician caring for complex patients such as those infected with HIV. The inherent possibility of a drug interaction is magnified by the multitude of drugs being administered in highly-active antiretroviral therapy (HAART). In addition, other classes of medications are used to alleviate side effects, reduce toxicities associated with HAART, or treat concomitant diseases. The modification of one drug by another substance or drug-drug interaction is the main focus of this article. Drug-drug interactions may result in toxicity, treatment failure, or loss of effectiveness and can significantly affect a patient’s clinical outcome. An understanding of the fundamental mechanisms of HIV drug-drug interactions may allow for the early detection or avoidance of troublesome regimens and prudent management if they develop. Although HIV drug interactions are usually thought of as detrimental, resulting in a loss of therapeutic effect or toxicity, some drug interactions such as ritonavir boosted protease inhibitor–based antiretroviral treatments are beneficial and are commonly used in clinical practice. Therefore, pharmacists need to understand drug interaction mechanisms, remember key drug interactions, and vigilantly monitor patients for potential complications.
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Affiliation(s)
- Susan A. Krikorian
- Department of Pharmacy Practice, School of Pharmacy, Massachusetts College of Pharmacy and Health Sciences; Beth Israel Deaconess Medical Center, Boston, Massachusetts
| | - Dorothea C. Rudorf
- Department of Pharmacy Practice, School of Pharmacy, Massachusetts College of Pharmacy and Health Sciences; Beth Israel Deaconess Medical Center, Boston, Massachusetts
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7
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Cheng WH, Chang CH, Lu PL, Lin HC. Bilateral uveitis associated with concurrent administration of rifabutin and nelfinavir. Taiwan J Ophthalmol 2015; 5:187-188. [PMID: 29018696 PMCID: PMC5602138 DOI: 10.1016/j.tjo.2014.08.004] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2014] [Revised: 06/27/2014] [Accepted: 08/18/2014] [Indexed: 11/17/2022] Open
Abstract
Rifabutin-associated uveitis has been recognized as a dosage-dependent side effect. Previous studies have reported that clarithromycin or fluconazole may elevate concentrations of rifabutin through inhibition of metabolism through the cytochrome P-450 pathway. Nelfinavir is a protease inhibitor widely used in the treatment of human immunodeficiency virus (HIV) infection. The interactions between protease inhibitors and rifabutin have not been reported in clinical practice. Therefore, we present a case of bilateral uveitis associated with coadministration of rifabutin and nelfinavir. Uveitis did not subside until discontinuation of rifabutin. To our knowledge, this is the first report of uveitis with concurrent administration of rifabutin and nelfinavir. Our finding reminds us that rifabutin dosage should be reduced when it is administered with protease inhibitors.
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Affiliation(s)
- Wen-Hsin Cheng
- Department of Ophthalmology, Kaohsiung Medical University Hospital, Kaohsiung Medical University, Kaohsiung, Taiwan
| | - Cheng-Hsien Chang
- Department of Ophthalmology, Kaohsiung Medical University Hospital, Kaohsiung Medical University, Kaohsiung, Taiwan.,School of Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan
| | - Po-Liang Lu
- School of Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan.,Department of Internal Medicine, Kaohsiung Medical University Hospital, Kaohsiung, Taiwan
| | - Hsien-Chung Lin
- Department of Ophthalmology, Kaohsiung Medical University Hospital, Kaohsiung Medical University, Kaohsiung, Taiwan.,Department of Ophthalmology, Yuan's General Hospital, Kaohsiung, Taiwan
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8
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Cross GB, Le Q, Webb B, Jenkin GA, Korman TM, Francis M, Woolley I. Mycobacterium haemophilum bone and joint infection in HIV/AIDS: case report and literature review. Int J STD AIDS 2015; 26:974-81. [PMID: 25577597 DOI: 10.1177/0956462414565403] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2014] [Accepted: 11/18/2014] [Indexed: 11/15/2022]
Abstract
We report a case of disseminated Mycobacterium haemophilum osteomyelitis in a patient with advanced HIV infection, who later developed recurrent immune reconstitution inflammatory syndrome after commencement of antiretroviral therapy. We review previous reports of M. haemophilum bone and joint infection associated with HIV infection and describe the management of M. haemophilum-associated immune reconstitution inflammatory syndrome, including the role of surgery as an adjunctive treatment modality and the potential drug interactions between antiretroviral and antimycobacterial agents.
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Affiliation(s)
- Gail B Cross
- Departments of Microbiology, Monash Health, Melbourne, Australia Infectious Diseases, Monash Health, Melbourne, VIC, Australia
| | - Quynh Le
- Infectious Diseases, Monash Health, Melbourne, VIC, Australia
| | - Brooke Webb
- Departments of Microbiology, Monash Health, Melbourne, Australia
| | - Grant A Jenkin
- Infectious Diseases, Monash Health, Melbourne, VIC, Australia
| | - Tony M Korman
- Departments of Microbiology, Monash Health, Melbourne, Australia Infectious Diseases, Monash Health, Melbourne, VIC, Australia Department of Medicine, Monash Health, Melbourne, VIC, Australia
| | - Michelle Francis
- Departments of Microbiology, Monash Health, Melbourne, Australia
| | - Ian Woolley
- Infectious Diseases, Monash Health, Melbourne, VIC, Australia Department of Medicine, Monash Health, Melbourne, VIC, Australia Department of Infectious Diseases, Monash University, VIC, Australia
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9
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Moxifloxacin for Buruli ulcer/HIV-coinfected patients: kill two birds with one stone? Author reply. AIDS 2014; 28:1845-6. [PMID: 25006828 DOI: 10.1097/qad.0000000000000304] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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10
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O'Brien DP, Ford N, Vitoria M, Christinet V, Comte E, Calmy A, Stienstra Y, Eholie S, Asiedu K. Management of BU-HIV co-infection. Trop Med Int Health 2014; 19:1040-7. [DOI: 10.1111/tmi.12342] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- D. P. O'Brien
- Manson Unit; Médecins Sans Frontières; London UK
- Department of Infectious Diseases; Barwon Health; Geelong Vic. Australia
- Department of Medicine and Infectious Diseases; Royal Melbourne Hospital; University of Melbourne; Melbourne Vic. Australia
| | - N. Ford
- HIV Department; World Health Organisation; Geneva Switzerland
| | - M. Vitoria
- HIV Department; World Health Organisation; Geneva Switzerland
| | - V. Christinet
- Department of HIV; University Hospitals of Geneva; Geneva Switzerland
| | - E. Comte
- Medical Unit; Médecins Sans Frontières; Geneva Switzerland
| | - A. Calmy
- Department of HIV; University Hospitals of Geneva; Geneva Switzerland
| | - Y. Stienstra
- Department of Internal Medicine and Infectious Diseases; University Medical Center; University of Groningen; Groningen The Netherlands
| | - S. Eholie
- Unit of Tropical and Infectious Diseases; Treichville University Teaching Hospital; Abidjan Côte d'Ivoire
| | - K. Asiedu
- Department of Control of Neglected Tropical Diseases; World Health Organisation; Geneva Switzerland
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11
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Corti M, Palmero D. Mycobacterium aviumcomplex infection in HIV/AIDS patients. Expert Rev Anti Infect Ther 2014; 6:351-63. [PMID: 18588499 DOI: 10.1586/14787210.6.3.351] [Citation(s) in RCA: 55] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Marcelo Corti
- HIV/AIDS Division, Infectious Diseases FJ Muñiz Hospital, Buenos Aires, Argentina.
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13
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London NJS, Garg SJ, Moorthy RS, Cunningham ET. Drug-induced uveitis. J Ophthalmic Inflamm Infect 2013; 3:43. [PMID: 23522744 PMCID: PMC3637087 DOI: 10.1186/1869-5760-3-43] [Citation(s) in RCA: 60] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2013] [Accepted: 03/13/2013] [Indexed: 01/21/2023] Open
Abstract
A number of medications have been associated with uveitis. This review highlights both well-established and recently reported systemic, topical, intraocular, and vaccine-associated causes of drug-induced uveitis, and assigns a quantitative score to each medication based upon criteria originally described by Naranjo and associates.
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Affiliation(s)
- Nikolas JS London
- Retina Consultants San Diego, 9850 Genesee Avenue, Suite 700, La Jolla, CA, 92037, USA
| | - Sunir J Garg
- MidAtlantic Retina, The Retina Service of Wills Eye Institute, Thomas Jefferson University, 840 Walnut Street, Suite 1020, Philadelphia, PA, 19107, USA
| | - Ramana S Moorthy
- Associated Vitreoretinal and Uveitis Consultants, St. Vincent Hospital and Health Services, Indianapolis, IN, 46260, USA
- Associate Clinical Professor of Ophthalmology, Indiana University School of Medicine, Indianapolis, IN, 46202, USA
| | - Emmett T Cunningham
- Department of Ophthalmology, California Pacific Medical Center, San Francisco, CA, 94115, USA
- Department of Ophthalmology, Stanford University School of Medicine, Stanford, CA, 94305-5101, USA
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14
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Frumin J, Yunker N. Rifabutin-Induced Thrombocytopenia from Concurrent Use of High-Dose Fluconazole. J Pharm Technol 2012. [DOI: 10.1177/875512251202800203] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Objective: To report a case of—and review the literature supporting—rifabutin-induced thrombocytopenia from concurrent use of high-dose fluconazole. Case Summary: A 34-year-old man with AIDS, on a stable regimen that included rifabutin and fluconazole for the previous 3 months, was admitted to the hospital with symptoms of oropharyngeal candidiasis. He was treated with increased doses of fluconazole 200 mg to 800 mg daily over a 9-day hospital admission. During this time, his platelet count decreased from 441,000 cells/mm3 to 24,000 cells/mm3, with no signs of bleeding. He was discharged on day 9 and instructed to omit 1 dose of rifabutin and continue fluconazole 200 mg daily. On day 12, his platelet count was 118,000 cells/mm3. About 1 month after discharge, his platelet count was 151,000 cells/mm3. Discussion: Rifabutin is known to cause thrombocytopenia. Results from initial studies evaluating various doses of rifabutin were not conclusive as to whether rifabutin-induced thrombocytopenia is a dose-dependent effect. With increased use of rifabutin, often in combination with potentially interacting medications, reports of thrombocytopenia have gained frequency. One study showed that patients on higher doses of rifabutin experienced thrombocytopenia significantly more often than did those on lower doses. When rifabutin is administered with fluconazole, there is a clear pharmacokinetic interaction, showing a 76–82% increase in the rifabutin area under the concentration curve, with only uveitis and leukopenia reported. An objective causality assessment of this case classified the interaction between fluconazole and rifabutin, resulting in thrombocytopenia, as probable. Other causes of thrombocytopenia in our patient, including AIDS, Mycobacterium avium complex, fluconazole, famotidine, and ritonavir, are less likely. Conclusions: We describe the first case of rifabutin-induced thrombocytopenia from concurrent use of high-dose fluconazole. There is evidence to support this interaction and practitioners should be aware of this potential adverse effect.
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Affiliation(s)
- Jane Frumin
- JANE FRUMIN PharmD BCPS, Assistant Professor, Clinical and
Administrative Sciences, School of Pharmacy, Notre Dame of Maryland University,
Baltimore, MD
| | - Nancy Yunker
- NANCY YUNKER PharmD BCPS, Assistant Professor of Pharmacotherapy and
Outcomes Science, School of Pharmacy, Virginia Commonwealth University,
Richmond
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15
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Hsu O, Hill CJ, Kim M, Tan B, O'Brien JG. Decreased plasma efavirenz concentrations in a patient receiving rifabutin. Am J Health Syst Pharm 2011; 67:1611-4. [PMID: 20852162 DOI: 10.2146/ajhp090516] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
PURPOSE The case of a patient with decreased plasma efavirenz concentrations during concomitant rifabutin therapy is reported. SUMMARY A 42-year-old Hispanic man newly diagnosed with acquired immune deficiency syndrome (AIDS) and coinfected with aseptic meningitis and disseminated Mycobacterium avium complex (MAC) received efavirenz-based highly active antiretroviral therapy (HAART). When the patient was admitted to the hospital, his medications included enoxaparin, metformin, ganciclovir, clarithromycin, ethambutol, rifampin, pyrazinamide, isoniazid, pyridoxine, trimethoprim-sulfamethoxazole, dexamethasone, and tenofovir-emtricitabine- efavirenz. Rifampin was changed to rifabutin 450 mg daily due to the potential interaction with rifampin and efavirenz. Clarithromycin was replaced with azithromycin for the treatment of MAC infection, and dexamethasone was gradually decreased over three months. The established therapeutic plasma concentration of efavirenz is 1-4 μg/mL. After receiving the standard efavirenz dosage of 600 mg daily, the patient had subtherapeutic plasma efavirenz concentrations. To correct these low concentrations, the patient's efavirenz dosage was increased to 800 mg daily; however, his efavirenz concentrations continued to remain subtherapeutic (two concentrations of 0.58 μg/mL). The patient's viral load decreased slowly while on HAART; however, it only became undetectable 12 days after rifabutin was discontinued. The Drug Interaction Probability Scale demonstrated a probable relationship between the coadministration of rifabutin and the decreased efavirenz concentrations due to the possible induction of efavirenz metabolism by rifabutin. CONCLUSION A 42-year-old Hispanic man newly diagnosed with AIDS had subtherapeutic efavirenz levels during concomitant treatment with rifabutin.
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Affiliation(s)
- Oliver Hsu
- Department of Clinical Pharmacy, University of California San Francisco, San Francisco, CA 94143, USA.
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16
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Zhou SF, Liu JP, Chowbay B. Polymorphism of human cytochrome P450 enzymes and its clinical impact. Drug Metab Rev 2009; 41:89-295. [PMID: 19514967 DOI: 10.1080/03602530902843483] [Citation(s) in RCA: 502] [Impact Index Per Article: 33.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Pharmacogenetics is the study of how interindividual variations in the DNA sequence of specific genes affect drug response. This article highlights current pharmacogenetic knowledge on important human drug-metabolizing cytochrome P450s (CYPs) to understand the large interindividual variability in drug clearance and responses in clinical practice. The human CYP superfamily contains 57 functional genes and 58 pseudogenes, with members of the 1, 2, and 3 families playing an important role in the metabolism of therapeutic drugs, other xenobiotics, and some endogenous compounds. Polymorphisms in the CYP family may have had the most impact on the fate of therapeutic drugs. CYP2D6, 2C19, and 2C9 polymorphisms account for the most frequent variations in phase I metabolism of drugs, since almost 80% of drugs in use today are metabolized by these enzymes. Approximately 5-14% of Caucasians, 0-5% Africans, and 0-1% of Asians lack CYP2D6 activity, and these individuals are known as poor metabolizers. CYP2C9 is another clinically significant enzyme that demonstrates multiple genetic variants with a potentially functional impact on the efficacy and adverse effects of drugs that are mainly eliminated by this enzyme. Studies into the CYP2C9 polymorphism have highlighted the importance of the CYP2C9*2 and *3 alleles. Extensive polymorphism also occurs in other CYP genes, such as CYP1A1, 2A6, 2A13, 2C8, 3A4, and 3A5. Since several of these CYPs (e.g., CYP1A1 and 1A2) play a role in the bioactivation of many procarcinogens, polymorphisms of these enzymes may contribute to the variable susceptibility to carcinogenesis. The distribution of the common variant alleles of CYP genes varies among different ethnic populations. Pharmacogenetics has the potential to achieve optimal quality use of medicines, and to improve the efficacy and safety of both prospective and currently available drugs. Further studies are warranted to explore the gene-dose, gene-concentration, and gene-response relationships for these important drug-metabolizing CYPs.
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Affiliation(s)
- Shu-Feng Zhou
- School of Health Sciences, RMIT University, Bundoora, Victoria, Australia.
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Koeppe J, Belknap R, Bessesen M. Mycobacterium avium complex peritonitis in the setting of cirrhosis: Case report and review of the literature. ACTA ACUST UNITED AC 2009; 36:615-7. [PMID: 15370677 DOI: 10.1080/00365540410017626] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
Mycobacterium avium complex is a rare cause of peritonitis. We report here the fourth case in the literature of MAC peritonitis associated with cirrhosis in the absence of AIDS, and discuss the possibility of different etiologies in persons with and without AIDS.
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Affiliation(s)
- John Koeppe
- Department of Infectious Diseases, University of Colorado Health Sciences Center, Denver, CO, USA.
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18
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Abstract
Non-tuberculous mycobacteria are ubiquitous environmental organisms that have been recognized as a cause of pulmonary infection for over 50 years. Traditionally patients have had underlying risk factors for development of disease; however, the proportion of apparently immunocompetent patients involved appears to be rising. Not all patients culture-positive for mycobacteria will have progressive disease, making the diagnosis difficult, though criteria to aid in this process are available. The two main forms of disease are cavitary disease (usually involving the upper lobes) and fibronodular bronchiectasis (predominantly middle and lingular lobes). For patients with disease, combination antibiotic therapy for 12-24 months is generally required for successful treatment, and this may be accompanied by drug intolerances and side-effects. Published success rates range from 30% to 82%. As the progression of disease is variable, for some patients, attention to pulmonary hygiene and underlying diseases without immediate antimycobacterial therapy may be more appropriate. Surgery can be a useful adjunct, though is associated with risks. Randomized controlled trials in well-described patients would provide stronger evidence-based data to guide therapy of non-tuberculous mycobacteria lung diseases, and thus are much needed.
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Affiliation(s)
- Rachel M Thomson
- QLD TB Control Centre, Specialised Health Services, The Prince Charles Hospital, Brisbane, Queensland, Australia.
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Pharmacology of second-line antituberculosis drugs and potential for interactions with antiretroviral agents. AIDS 2009; 23:437-46. [PMID: 19256042 DOI: 10.1097/qad.0b013e328326ca50] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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20
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Dooley K, Flexner C, Andrade A. Drug Interactions Involving Combination Antiretroviral Therapy and Other Anti‐Infective Agents: Repercussions for Resource‐Limited Countries. J Infect Dis 2008; 198:948-61. [DOI: 10.1086/591459] [Citation(s) in RCA: 63] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
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21
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Schwiesow JN, Iseman MD, Peloquin CA. Concomitant Use of Voriconazole and Rifabutin in a Patient with Multiple Infections. Pharmacotherapy 2008; 28:1076-80. [DOI: 10.1592/phco.28.8.1076] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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22
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Lin HC, Lu PL, Chang CH. Uveitis associated with concurrent administration of rifabutin and lopinavir/ritonavir (Kaletra). Eye (Lond) 2007; 21:1540-1. [DOI: 10.1038/sj.eye.6703016] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
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Manosuthi W, Athichathanabadi C, Uttayamakul S, Phoorisri T, Sungkanuparph S. Plasma nevirapine levels, adverse events and efficacy of antiretroviral therapy among HIV-infected patients concurrently receiving nevirapine-based antiretroviral therapy and fluconazole. BMC Infect Dis 2007; 7:14. [PMID: 17352798 PMCID: PMC1828732 DOI: 10.1186/1471-2334-7-14] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2006] [Accepted: 03/12/2007] [Indexed: 11/10/2022] Open
Abstract
Background The clinical data of plasma NVP level, safety and efficacy of antiretroviral therapy (ART) for the concurrent use of nevirapine (NVP)-based ART and fluconazole (FLU) is scanty. Methods A retrospective study was conducted in patients who were initiated NVP-based ART between October 2004 and November 2005. The objectives were to compare NVP levels, adverse events, and 36-week efficacy of NVP-based ART between patients who did not receive FLU (group A) and those who received FLU 200 mg/day or 400 mg/day (group B). Results There were 122 patients with mean ± SD age of 36 ± 9 years; 81 in group A and 41 in group B. Median (IQR) baseline CD4 cell count was 29 (8–79) cell/mm3 in group A and 19 (8–33) cell/mm3 in group B (P = 0.102). Baseline characteristics between the two groups were similar. Mean ± SD NVP levels were 6.5 ± 3.0 mg/L in group A and 11.4 ± 6.1 mg/L in group B(P < 0.001). One (2.4%) patient in group B developed clinical hepatitis (P = 0.336). Six (7.4%) patients in group A developed NVP-related skin rashes (P = 0.096). There were no differences in term of 36-week antiviral efficacy between the two groups (P > 0.05). Conclusion Co-administration of NVP and daily dosage of FLU (200 mg/day and 400 mg/day) results in markedly increased trough plasma NVP level when compared to the administration of NVP alone. The concurrent use of NVP and FLU in very advanced HIV-infected patients is well-tolerated. The immunological and virological responses are favorable.
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Affiliation(s)
- Weerawat Manosuthi
- Bamrasnaradura Infectious Diseases Institute, Ministry of Public Health, Nonthaburi, Thailand
| | | | - Sumonmal Uttayamakul
- Bamrasnaradura Infectious Diseases Institute, Ministry of Public Health, Nonthaburi, Thailand
| | - Thanongsri Phoorisri
- Bamrasnaradura Infectious Diseases Institute, Ministry of Public Health, Nonthaburi, Thailand
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Krishna G, Parsons A, Kantesaria B, Mant T. Evaluation of the pharmacokinetics of posaconazole and rifabutin following co-administration to healthy men. Curr Med Res Opin 2007; 23:545-52. [PMID: 17355736 DOI: 10.1185/030079906x167507] [Citation(s) in RCA: 69] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
OBJECTIVE Posaconazole is a triazole antifungal agent for the treatment and prophylaxis of invasive fungal infections. This non-randomized, open-label, parallel-group, multiple-dose, drug-interaction study was conducted to evaluate the pharmacokinetics of posaconazole and rifabutin following co-administration to healthy subjects. METHODS Subjects were assigned to treatment groups: Group 1 (posaconazole, 200-mg tablet once daily for 10 days) or Group 2 (rifabutin, 300-mg capsule once daily for 17 days [Days -7 to 10] co-administered with posaconazole, 200 mg tablet once daily for 10 days [Days 1-10]). Posaconazole was administered after rifabutin steady-state was reached. Individual plasma concentration-time data for posaconazole (Day 10, Groups 1 and 2) and rifabutin (Days -1 and 10, Group 2) were analyzed using model-independent methods. RESULTS Twenty-four men were enrolled in the study. All subjects in Group 1 completed the study; however, four subjects in Group 2 discontinued because of adverse events. When co-administered with rifabutin, posaconazole maximum plasma concentration (C(max)) and area under the plasma concentration-time curve over the dosing interval (AUC([tau])) were reduced 43% (p = 0.005) and 49% (p = 0.008), respectively. Conversely, rifabutin C(max) and AUC([tau]) increased 31% (p = 0.016) and 72% (p < 0.001), respectively, when co-administered with posaconazole. CONCLUSION Based on the reduced exposure to posaconazole observed in the limited number of subjects in this study and the increased risk for adverse events associated with elevated rifabutin concentrations, concomitant use of rifabutin and posaconazole should be avoided unless the benefit outweighs the risk.
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Affiliation(s)
- G Krishna
- Schering-Plough Research Institute, Kenilworth, NJ 07033, USA.
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Ma Q, Okusanya OO, Smith PF, Dicenzo R, Slish JC, Catanzaro LM, Forrest A, Morse GD. Pharmacokinetic drug interactions with non-nucleoside reverse transcriptase inhibitors. Expert Opin Drug Metab Toxicol 2006; 1:473-85. [PMID: 16863456 DOI: 10.1517/17425255.1.3.473] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Non-nucleoside reverse transcriptase inhibitors (NNRTIs) are a diverse group of compounds that inhibit HIV Type 1 reverse transcriptase. Although possessing a common mechanism of action, the approved NNRTIs, delavirdine, efavirenz and nevirapine, differ in structural and pharmacokinetic characteristics. Each of the NNRTIs undergoes biotransformation by the cytochrome P450 (CYP) enzyme system, thus making them prone to clinically significant drug interactions when combined with other antiretrovirals. In addition, they interact with other concurrent medications and complementary/alternative medicines, acting as either inducers or inhibitors of drug-metabolising CYP enzymes. These drug interactions become an important consideration in the clinical use of these agents when designing combination regimens, as recommended by current guidelines. This review provides an updated summary of pharmacokinetic interactions with NNRTIs.
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Affiliation(s)
- Qing Ma
- University at Buffalo, Pharmacotherapy Research Center, Department of Pharmacy Practice, School of Pharmacy and Pharmaceutical Sciences, 317 Hochstetter Hall, Buffalo, NY 14260, USA
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Manosuthi W, Chumpathat N, Chaovavanich A, Sungkanuparph S. Safety and tolerability of nevirapine-based antiretroviral therapy in HIV-infected patients receiving fluconazole for cryptococcal prophylaxis: a retrospective cohort study. BMC Infect Dis 2005; 5:67. [PMID: 16120209 PMCID: PMC1199598 DOI: 10.1186/1471-2334-5-67] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2005] [Accepted: 08/24/2005] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND To compare the adverse events after initiation of NVP-based ART among HIV-infected patients who did not receive fluconazole (group A), received fluconazole 400 mg/week (group B), and received fluconazole 200 mg/day (group C). METHODS A retrospective cohort study was conducted among HIV-infected patients who began NVP-based ART between December 2003 and September 2004. Patients were followed up for 6 months. Clinical hepatitis, elevated aspartate aminotransferase (AST) and alanine aminotransferase (ALT) (> 3 times from baseline), and skin rashes were studied. RESULTS There were 686 patients; 225, 392, and 69 patients in group A, B, and C, respectively. Baseline characteristics including age, previous opportunistic infections, use of antituberculous drugs, and baseline aminotransferase levels among the three groups were similar. Group C had a higher proportion of men (p = 0.016). Baseline median (IQR) CD4 cell counts were 85 (21-159), 18 (7-48), and 16 (5-35) cell/mm3 in group A, B, and C, respectively (p < 0.001). Of 2/225 (0.9%), 4/392 (1.0%), and 0/69 (0%) patients in group A, B, and C developed clinical hepatitis (p = 0.705). There were no significant difference of elevated AST or ALT among the three groups (p > 0.05). By logistic regression, receiving fluconazole was not predictive of clinical hepatitis, elevated aminotransferase, or skin rashes. At 6 months after initiating NVP, 174 (77.3%) patients in group A, 309 (78.8%) patients in group B, and 58 (84.1%) patients in group C remained on NVP. CONCLUSION Initiation of NVP-based ART among Thais with advance HIV disease receiving fluconazole is safe and well-tolerated. NVP should not be contraindicated for patients receiving fluconazole for treatment or prophylaxis of cryptococcosis.
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Affiliation(s)
- Weerawat Manosuthi
- Bamrasnaradura Institute, Ministry of Public Health, Nonthaburi, 11000, Thailand
| | | | - Achara Chaovavanich
- Bamrasnaradura Institute, Ministry of Public Health, Nonthaburi, 11000, Thailand
| | - Somnuek Sungkanuparph
- Faculty of Medicine Ramathibodi Hospital, Mahidol University, Bangkok, 10400, Thailand
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de Maat MMR, Ekhart GC, Huitema ADR, Koks CHW, Mulder JW, Beijnen JH. Drug interactions between antiretroviral drugs and comedicated agents. Clin Pharmacokinet 2003; 42:223-82. [PMID: 12603174 DOI: 10.2165/00003088-200342030-00002] [Citation(s) in RCA: 113] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
Abstract
HIV-infected individuals usually receive a wide variety of drugs in addition to their antiretroviral drug regimen. Since both non-nucleoside reverse transcriptase inhibitors and protease inhibitors are extensively metabolised by the cytochrome P450 system, there is a considerable potential for pharmacokinetic drug interactions when they are administered concomitantly with other drugs metabolised via the same pathway. In addition, protease inhibitors are substrates as well as inhibitors of the drug transporter P-glycoprotein, which also can result in pharmacokinetic drug interactions. The nucleoside reverse transcriptase inhibitors are predominantly excreted by the renal system and may also give rise to interactions. This review will discuss the pharmacokinetics of the different classes of antiretroviral drugs and the mechanisms by which drug interactions can occur. Furthermore, a literature overview of drug interactions is given, including the following items when available: coadministered agent and dosage, type of study that is performed to study the drug interaction, the subjects involved and, if specified, the type of subjects (healthy volunteers, HIV-infected individuals, sex), antiretroviral drug(s) and dosage, interaction mechanism, the effect and if possible the magnitude of interaction, comments, advice on what to do when the interaction occurs or how to avoid it, and references. This discussion of the different mechanisms of drug interactions, and the accompanying overview of data, will assist in providing optimal care to HIV-infected patients.
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Affiliation(s)
- Monique M R de Maat
- Department of Pharmacy and Pharmacology, Slotervaart Hospital, Amsterdam, The Netherlands.
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Mah Ming JB, Gill MJ. Drug-induced rhabdomyolysis after concomitant use of clarithromycin, atorvastatin, and lopinavir/ritonavir in a patient with HIV. AIDS Patient Care STDS 2003; 17:207-10. [PMID: 12816614 DOI: 10.1089/108729103321655854] [Citation(s) in RCA: 56] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
A case report of drug-induced rhabdomyolysis in a 34-year-old HIV-infected male with a history of liver disease and concomitant use of clarithromycin, atorvastatin, and lopinavir/ritonavir is presented.
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Affiliation(s)
- Jinell B Mah Ming
- Southern Alberta HIV Clinic, Calgary Health Region, Calgary, Alberta, Canada
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Abstract
Clinically significant interactions occurring during antituberculous chemotherapy principally involve rifampicin (rifampin), isoniazid and the fluoroquinolones. Such interactions between the antituberculous drugs and coadministered agents are definitely much more important than among antituberculous drugs themselves. These can be associated with consequences even amounting to therapeutic failure or toxicity. Most of the interactions are pharmacokinetic rather than pharmacodynamic in nature. The cytochrome P450 isoform enzymes are responsible for many interactions (especially those involving rifampicin and isoniazid) during drug biotransformation (metabolism) in the liver and/or intestine. Generally, rifampicin is an enzyme inducer and isoniazid acts as an inhibitor. The agents interacting significantly with rifampicin include anticoagulants, anticonvulsants, anti-infectives, cardiovascular therapeutics, contraceptives, glucocorticoids, immunosuppressants, psychotropics, sulphonylureas and theophyllines. Isoniazid interacts principally with anticonvulsants, theophylline, benzodiapines, paracetamol (acetaminophen) and some food. Fluoroquinolones can have absorption disturbance due to a variety of agents, especially the metal cations. Other important interactions of fluoroquinolones result from their enzyme inhibiting potential or pharmacodynamic mechanisms. Geriatric and immunocompromised patients are particularly at risk of drug interactions during treatment of their tuberculosis. Among the latter, patients who are HIV infected constitute the most important group. This is largely because of the advent of new antiretroviral agents such as the HIV protease inhibitors and the non-nucleoside reverse transcriptase inhibitors in the armamenterium of therapy. Compounding the complexity of drug interactions, underlying medical diseases per se may also contribute to or aggravate the scenario. It is imperative for clinicians to be on the alert when treating tuberculosis in patients with difficult co-morbidity requiring polypharmacy. With advancement of knowledge and expertise, it is hoped that therapeutic drug monitoring as a new paradigm of care can enable better management of these drug interactions.
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Affiliation(s)
- W W Yew
- Tuberculosis & Chest Unit, Grantham Hospital, Aberdeen, Hong Kong, China.
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