The effects of concomitant immunomodulators on the pharmacokinetics, efficacy and safety of adalimumab in paediatric patients with Crohn's disease: a post hoc analysis

BACKGROUND

In the IMAgINE 1 study, adalimumab induced and maintained remission of moderate-to-severe Crohn's disease in children.

AIM

To assess the efficacy, pharmacokinetics, immunogenicity and safety of immunomodulator and adalimumab combination therapy vs adalimumab monotherapy in paediatric patients with Crohn's disease.

METHODS

Patients 6-17 years old with moderate-to-severe Crohn's disease (n = 192) received weight-based adalimumab induction at baseline and week 2. At week 4, 188 patients were randomised to high-dose or low-dose adalimumab. Patients receiving immunomodulators (investigator's decision) at baseline maintained a stable dose until week 26; patients could then discontinue immunomodulators. Adalimumab serum concentrations were measured at weeks 4, 26 and 52. Safety was evaluated at each study visit. Data were analysed using non-responder imputation (NRI; week 4) or modified NRI (weeks 26; 52).

RESULTS

At week 4, patients with (n = 117) and without (n = 71) baseline immunomodulator use had similar response (79%; 87%; P = 0.235) and remission (26%; 30%; P = 0.737) rates. At week 26, patients with and without baseline immunomodulators had no significant difference in response (68%; 55%; P = 0.086) or remission (41%; 30%; P = 0.122). At week 52, patients with (n = 82) and without (n = 106) immunomodulator use had no significant difference in response (56%; 46%; P = 0.189) or remission (38%; 33%; P = 0.539). Adalimumab serum trough concentrations and serious infection rates (7%; 6%) were not significantly different between groups.

CONCLUSIONS

Analyses found no statistically significant difference in response or remission between patients receiving adalimumab monotherapy vs immunomodulator and adalimumab combination therapy. Serious and infectious adverse event rates were similar between groups.

Nebulized Morphine for Relief of Dyspnea Due to Chronic Lung Disease

OBJECTIVE:

To evaluate the efficacy and safety of nebulized morphine for the management of dyspnea in chronic pulmonary diseases.

DATA SOURCES:

MEDLINE (1966–May 2004), EMBASE (1980–May 2004), and International Pharmaceutical Abstracts (1970–May 2004) searches were performed. Key search terms included morphine, dyspnea, and inhalation.

DATA SYNTHESIS:

Nine studies have evaluated the efficacy of nebulized morphine in relieving dyspnea. Three trials had positive resuts, but the rest failed to show improvement after treatment with doses ranging from 1 to 40 mg nebulized morphine. The small number of subjects, variety of disease states, and different outcome measures limit interpretation of the studies.

CONCLUSIONS:

Results from several small studies do not support the use of nebulized morphine for treatment of dyspnea; however, several positive case reports have been published.

Propofol-related infusion syndrome in critically ill pediatric patients: coincidence, association, or causation?

Over the past two decades numerous reports have described the development of a propofol-related infusion syndrome (PRIS) in critically ill adult and pediatric patients who received continuous infusion propofol for anesthesia or sedation. The syndrome is generally characterized by progressive metabolic acidosis, hemodynamic instability and bradyarrhythmias that are refractory to aggressive pharmacological treatments. PRIS may occur with or without the presence of hepatomegaly, rhabdomyolysis or lipemia. To date, the medical literature contains accounts of 20 deaths in critically ill pediatric patients who developed features consistent with PRIS. These reports have generated considerable discussion and debate regarding the relationship, if any, between propofol and a constellation of clinical symptoms and features that have been attributed to its use in critically ill pediatric patients. This paper reviews the literature concerning PRIS, its clinical presentation, proposed mechanisms for the syndrome, and potential management should the syndrome occur.

Evaluating the accuracy of health news publications in a drug literature evaluation course

OBJECTIVES

To design an assignment for second-professional year pharmacy students to assess the accuracy and quality of health information published in the news.

DESIGN

Students in a literature evaluation course were assigned a health-related news publication to review and find the original published research article. They then critically evaluated the quality and accuracy of the news publication based on the original research. All students wrote a critique focusing on the quality and accuracy of the news article and potential responses the lay public might have.

ASSESSMENT

Eighty-four percent of students agreed the writing assignment reinforced critical literature evaluation skills, while 90% agreed the assignment contributed to completion of course objectives.

CONCLUSIONS

A writing assignment requiring comparison of a news publication to the original research reinforces critical literature evaluation and communication skills, as well as stimulates thought about the accuracy, quality, and public responses to health information published in the news.

Weekly active-learning activities in a drug information and literature evaluation course

OBJECTIVES

To incorporate learning activities into the weekly 2-hour Drug Information and Literature Evaluation class sessions to improve student ability and confidence in performing course objectives, as well as to assess student perception of the value of these activities.

METHODS

In-class activities that emphasized content and skills taught within class periods were created and implemented. Three different surveys assessing student ability and confidence in completing drug information and literature retrieval and evaluation tasks were administered prior to and following the appropriate class sessions. At the completion of the course, an additional evaluation was administered to assess the students' impressions of the value of the learning activities.

RESULTS

Students reported increased ability and confidence in all course objectives. The teaching activities were also stated to be useful in students' learning of the material.

CONCLUSIONS

Incorporation of weekly learning activities resulted in an improvement in student ability and confidence to perform course objectives. Students considered these activities to be beneficial and to contribute to the completion of course objectives.

Evaluation of accuracy of health studies reported in mass media

OBJECTIVE

To evaluate communication of clinical research in the written media for completeness and accuracy.

DESIGN

Observational assessment.

SETTING

United States.

PARTICIPANTS

Not applicable.

INTERVENTIONS

Content of media articles discussing randomized controlled trials was assessed by three reviewers on the basis of the Consolidated Standards of Reporting Trials (CONSORT) criteria modified for the mass media. Reports from October 1 through December 31, 2002, published in the top two U.S. daily newspapers (USA Today and Wall Street Journal), weekly news magazines (Time and Newsweek), and daily news Web sources (CNN.com and MSNBC.com) and the corresponding published RCTs were analyzed.

MAIN OUTCOME MEASURES

Total score and score in 10 specific content areas, leading to classification of coverage as poor, fair, or excellent.

RESULTS

A total of 60 media reports discussing results of 25 RCTs appeared in these media during the study period. All reports were categorized as fair, and no content area was rated excellent. Several content areas received poor rankings in all and/or most media, including reporting of adverse effects, outcomes data, and statistical tests used. Media reports written by newswire services were rated more highly than were those prepared by nonnewswire services, but only 1 of 10 criteria had statistically significant differences.

CONCLUSION

Mass media reports of RCTs are often incomplete. This type of reporting may misinform the lay public and may lead to questions about the applicability of the results to individual patients.

Treating Functional Impairment of Autism with Selective Serotonin-Reuptake Inhibitors

OBJECTIVE:

To review literature describing use of selective serotonin-reuptake inhibitors (SSRIs) in the management of functional impairments associated with autistic disorder.

DATA SOURCES:

EMBASE (1980—3rd quarter of 2003), International Pharmaceutical Abstracts (1970–August 2003), and MEDLINE (1966–August 2003) were searched. Search terms included autism, autistic disorder, citalopram, fluoxetine, fluvoxamine, paroxetine, selective serotonin-reuptake inhibitors, and sertraline.

DATA SYNTHESIS:

Studies and case reports evaluating treatment outcomes associated with the use of SSRIs in managing impairments of autism were reviewed. Multiple SSRI dosing ranges were evaluated in autistic patients of different ages with various functional impairments. No specific SSRI or dose range has been shown to improve a specific autistic symptom although some patients have demonstrated improvements.

CONCLUSIONS:

Benefits with SSRIs in treating functional impairments in autism have been observed. Response to therapy and adverse effects are individualized. Current evidence does not support selection of one SSRI over another for any impairment associated with autism.

Treatment of migraine headaches with sumatriptan in pregnancy

OBJECTIVE

To review the literature for treatment of migraine headaches with sumatriptan during pregnancy.

DATA SOURCES

Studies and reports were located in International Pharmaceutical Abstracts (1970-September 2003) and MEDLINE (1966-week 3 September 2003).

DATA SYNTHESIS

Research has been performed to evaluate the risk of teratogenesis after sumatriptan exposure in pregnant patients. Data have been collected in areas including placental transmission of sumatriptan, prospective pregnancy registries, open-labeled and controlled prospective studies, and a retrospective prescription-linked study. As of August 6, 2004, no randomized controlled trials have been conducted with exposure to sumatriptan during pregnancy.

CONCLUSIONS

Teratogenesis occurs in approximately 150 000 births per year which represents an incidence of 3-5%. Available literature to date indicates that exposure to sumatriptan during pregnancy has no additional risk of birth defects compared with the incidence in the general population.

Weight gain mitigation with topiramate in mood disorders

OBJECTIVE

To review the evidence of weight loss with use of topiramate in patients with mood disorders.

DATA SOURCES

Literature search included MEDLINE (1966-December 2003), International Pharmaceutical Abstracts (1970-December 2003), and EMBASE (1980-December 2003). Search terms included topiramate, weight loss, adverse effect, mood disorders, bipolar disorder.

DATA SYNTHESIS

Weight gain is a common adverse effect of many agents used to treat mood disorders. Topiramate has been evaluated in the management of some mood disorders, and weight loss may be a beneficial side effect in these patients. Case reports, letters to the editor, prospective investigations, and retrospective observational studies were reviewed to identify evidence of weight loss with topiramate use in patients with mood disorders.

CONCLUSIONS

Current evidence suggests an association between topiramate and weight loss. Based on the limited data, controlled studies need to be conducted to define the role of topiramate in patients with mood disorders who would also benefit from weight reduction.

Urinary-Based Ovulation and Pregnancy: Point-of-Care Testing

OBJECTIVE

To review the literature concerning ovulation prediction devices and pregnancy detection tests for home use.

DATA SOURCES

Articles were identified through searches of the MEDLINE (1966–May 2003), EMBASE (1980–May 2003), and International Pharmaceutical Abstracts (1970–May 2003) databases using the key words ovulation, ovulation detection, pregnancy test, diagnostic reagent kit, and diagnostic test. Additional references were located through review of the bibliographies of the articles found in the literature search. Searches were not limited by time restriction, language, or use of human or animal subjects.

STUDY SELECTION AND DATA EXTRACTION

Review articles, textbook chapters, and experimental and observational studies on home use ovulation and pregnancy tests were selected.

DATA SYNTHESIS

Luteinizing hormone (LH)-based ovulation tests have demonstrated accurate and superior ovulation detection when compared to basal body temperature charting, calendar calculation, salivary ferning, or observation of vaginal or cervical discharge changes. Systems using LH and estrone-3-glucuronide (E3G) have also demonstrated accurate detection of the fertile period. Literature evaluating home use of pregnancy tests has demonstrated accurate use by lay persons.

CONCLUSIONS

Urinary-based ovulation prediction and pregnancy detection tests available for use by nonprofessionals enable women and couples to take an active role in the family planning process. Numerous products are available at reasonable costs to the consumer.

Pharmacokinetic Factors in the Adverse Cardiovascular Effects of Antipsychotic Drugs

Antipsychotics may cause serious adverse cardiovascular effects, including prolonged QT interval and sudden death. This review considers antipsychotic-induced cardiovascular events from three perspectives: high-risk drugs, high-risk individuals and high-risk drug interactions. Pharmacokinetic drug interactions involving the cytochrome P450 (CYP) enzymatic pathway and pharmacodynamic interactions leading to direct cardiotoxic effects are discussed. Original reports on antipsychotic-induced drug interactions are reviewed, with consideration of management guidelines. The literature was reviewed from 1 January 1966 to 1 February 2002. The literature search revealed only 12 original articles published on antipsychotic drug interactions leading to cardiovascular adverse events. Only 4 of the 12 reports were prospective studies; the remainder were either retrospective or anecdotal.Although poor study designs preclude a definitive statement, it appears that pharmacokinetic interactions primarily involved the CYP2D6 and CYP3A4 enzymatic pathways. Those involving the CYP2D6 isozyme included interactions with tricyclic antidepressants, selective serotonergic reuptake inhibitors and beta-blockers. Among these drug interactions, tricyclic antidepressants were most likely to reach clinical significance because of their limited therapeutic index. Drug interactions related to the CYP3A4 pathway were generally less severe, and involved high-potency antipsychotics coadministered with inhibitors such as clarithromycin. Strategies are discussed for the management of adverse cardiovascular events related to antipsychotic drug interactions, including the use of an algorithm. Large, randomised, placebo-controlled studies with strict inclusion criteria are needed to determine the role that antipsychotics play in QT prolongation and sudden death.

Comparing therapies for postmenopausal osteoporosis prevention and treatment

OBJECTIVE

To review the literature concerning the efficacy of calcium, hormone replacement therapy (HRT), bisphosphonates, selective estrogen receptor modulators, and calcitonin in the prevention and treatment of postmenopausal osteoporosis.

DATA SOURCES

Articles were identified through searches of the MEDLINE (1966-July 2002), EMBASE (1980-July 2002), and International Pharmaceutical Abstracts (1970-July 2002) databases using the key words osteoporosis, postmenopausal, fracture, calcium, vitamin D, hormone replacement therapy, bisphosphonates, alendronate, risedronate, raloxifene, and calcitonin. Additional references were located through review of the bibliographies of the articles cited. Searches were not limited by time restriction, language, or human subject.

STUDY SELECTION AND DATA EXTRACTION

Experimental and observational studies of the use of calcium and antiresorptive therapies for the prevention and treatment of postmenopausal osteoporosis were selected. Articles evaluating bone mineral density (BMD) or fracture efficacy were included in this review.

DATA SYNTHESIS

HRT, bisphosphonates, raloxifene, and calcitonin have demonstrated stabilization of and improvement in BMD. Randomized clinical trials have shown fracture risk reduction with bisphosphonates, raloxifene, HRT, calcium, and calcitonin. The largest risk reductions have been reported with use of bisphosphonates in several trials.

CONCLUSIONS

Several therapeutic options with well-documented improvements in BMD and reductions in fracture risk are available to women for the prevention and treatment of postmenopausal osteoporosis.