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Kirby-Madden T, Waring CT, Herron M. Effects of Gabapentin on the Treatment of Behavioral Disorders in Dogs: A Retrospective Evaluation. Animals (Basel) 2024; 14:1462. [PMID: 38791679 PMCID: PMC11117262 DOI: 10.3390/ani14101462] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2024] [Revised: 05/02/2024] [Accepted: 05/07/2024] [Indexed: 05/26/2024] Open
Abstract
The use of gabapentin in treating dogs with behavioral disorders is not well described. To characterize behavioral effects of gabapentin, this study surveyed 50 owners whose dogs were prescribed gabapentin at a veterinary behavior-focused practice over a five-year period. Most owners (72%) reported that gabapentin was moderately or very effective at improving their dog's behavior. The majority of owners reported at least one side effect (70%), with sedation being the most common. Sedation was more likely to be seen at doses higher than 30 mg/kg. Specific dose ranges (mg/kg) did not correlate with any other reports of side effects nor effectiveness. Dogs with a diagnosis of conflict-related aggression were more likely to have owners report that gabapentin was effective at improving behavior compared to dogs with other behavioral diagnoses (p = 0.04), while dogs diagnosed with aggression secondary to high arousal were less likely to have owners report that gabapentin was effective (p = 0.01). Overall, reports of effect varied widely and, with the exception of sedation, did not correlate with specific mg/kg dose ranges. Results suggest that some dogs may be more sensitive or resistant to adverse and/or therapeutic effects than others and multiple dosage trials may be needed before finding the best fit.
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Quimby JM, Jones SE, Saffire A, Brusach KK, Kurdziel K, George Z, Paschall RE, Aarnes TK. Assessment of the effect of gabapentin on blood pressure in cats with and without chronic kidney disease. J Feline Med Surg 2024; 26:1098612X241240326. [PMID: 38770706 PMCID: PMC11156237 DOI: 10.1177/1098612x241240326] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/26/2024] [Indexed: 05/22/2024]
Abstract
OBJECTIVES The aim of the present study was to assess the effect of gabapentin on blood pressure (BP) in cats with and without chronic kidney disease (CKD). METHODS A randomized, blinded, placebo-controlled crossover study was performed. A total of 29 cats were included: 13 cats with stable CKD (IRIS stage 2-4) and 16 apparently healthy cats (serum creatinine <1.6 mg/dl and urine specific gravity >1.035). The cats were evaluated twice, approximately 1 week apart, and BP (Doppler sphygmomanometry) was obtained 3 h after cats received either a single dose of gabapentin 10mg/kg PO or placebo. For each cat, BP readings were obtained at each visit using the same Doppler and sphygmomanometer unit, and the same cat holder and Doppler operator, in the same location. RESULTS After administration of a single dose of gabapentin (10 mg/kg PO), BP was significantly lower (median 122 mmHg, range 82-170) than after administration of the placebo (median 150 mmHg, range 102-191; P = 0.001). In the CKD subgroup, BP was significantly lower after administration of gabapentin (median 129 mmHg, range 96-170) than after administration of the placebo (median 155 mmHg, range 102-191; P = 0.008). In the healthy cat subgroup, BP was significantly lower after administration of gabapentin (median 121 mmHg, range 82-139) than after administration of the placebo (median 137 mmHg, range 102-177; P = 0.002). The median change in BP was -12 mmHg (range -95 to 10) for healthy cats and -12 mmHg (range -43 to 21) for cats with CKD (no significant difference between subgroups). CONCLUSIONS AND RELEVANCE Gabapentin may decrease arterial BP in cats with and without CKD and these findings should be taken into account when gabapentin is administered to patients in which measurement of BP is needed.
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Affiliation(s)
- Jessica M Quimby
- Department of Veterinary Clinical Sciences, College of Veterinary Medicine, The Ohio State University, Columbus, OH, USA
| | - Sarah E Jones
- Department of Veterinary Clinical Sciences, College of Veterinary Medicine, The Ohio State University, Columbus, OH, USA
- Current address: MedVet Columbus, Columbus, OH, USA
| | - Ashlie Saffire
- Cats Only Veterinary Clinic, Columbus, OH, USA
- Current address: Faithful Friends Veterinary Hospital, Columbus, OH, USA
| | - Katelyn K Brusach
- Department of Veterinary Clinical Sciences, College of Veterinary Medicine, The Ohio State University, Columbus, OH, USA
| | - Kim Kurdziel
- Department of Veterinary Clinical Sciences, College of Veterinary Medicine, The Ohio State University, Columbus, OH, USA
| | - Zach George
- Department of Veterinary Clinical Sciences, College of Veterinary Medicine, The Ohio State University, Columbus, OH, USA
| | - Rene E Paschall
- Department of Veterinary Clinical Sciences, College of Veterinary Medicine, The Ohio State University, Columbus, OH, USA
| | - Turi K Aarnes
- Department of Veterinary Clinical Sciences, College of Veterinary Medicine, The Ohio State University, Columbus, OH, USA
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Marangoni S, Ubiali M, Ambrosini F, Jahnel L, Vilani JM, Steagall PV, Vilani RGDDC. Effects of different rates of propofol with or without S-ketamine on ventricular function in healthy cats - a randomized study. Front Vet Sci 2023; 10:1272949. [PMID: 38152595 PMCID: PMC10752607 DOI: 10.3389/fvets.2023.1272949] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2023] [Accepted: 11/24/2023] [Indexed: 12/29/2023] Open
Abstract
Propofol is used for anesthetic induction in cats and procedural sedation in countries where alfaxalone is not available. Studies have reported propofol-related effects in echocardiography variables in dogs and humans. However, there is a lack of echocardiography studies investigating propofol-related effects on cats. This study aimed to use echocardiography to investigate echocardiographic changes in three protocols using propofol: propofol-slow (2 mg/kg/min, PS); propofol-fast (8 mg/kg/min, PF); propofol-ketamine (S-ketamine 2 mg/kg bolus followed by propofol 2 mg/kg/min; PK) in healthy premedicated (gabapentin-buprenorphine-acepromazine; 200 mg/cat, 0.4, and 0.1 mg/kg, respectively), non-intubated cats. Echocardiographic measurements were obtained at three time points: baseline (before the administration of propofol), end of propofol titration (end-point, T0), and 15 min after T0 (T15). Propofol at a lower rate continued from T0 to T15. Echocardiographic and physiological variables included fractional shortening (FS%), ejection fraction (EF%), HR, BP, and others. Propofol requirements at T0 for PF, PS, and PK groups were 5.0 ± 0.9, 3.8 ± 0.7, and 2.4 ± 0.5 mg/kg, respectively. EF% neither change over time nor between groups. PF and PK showed a reduction in FS% at T0 (47 ± 6 to 34 ± 6 and 42 ± 6 to 36 ± 5, respectively). BP reduced significantly in PF and PS groups (136 ± 26 to 105 ± 13 and 137 ± 22 to 115 ± 15 mmHg, respectively). It is unclear whether changes in echocardiography variables were of clinical relevance related to treatment groups or a result of within-group individual responses.
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Affiliation(s)
- Sabrine Marangoni
- Department of Veterinary Medicine, Federal University of Paraná, Juvevê, Curitiba, PR, Brazil
| | - Matheus Ubiali
- Department of Veterinary Medicine, Federal University of Paraná, Juvevê, Curitiba, PR, Brazil
| | - Francieli Ambrosini
- Department of Veterinary Medicine, Federal University of Paraná, Juvevê, Curitiba, PR, Brazil
| | - Larissa Jahnel
- Department of Veterinary Medicine, Federal University of Paraná, Juvevê, Curitiba, PR, Brazil
| | - Julia M. Vilani
- Department of Veterinary Medicine, Federal University of Paraná, Juvevê, Curitiba, PR, Brazil
| | - Paulo V. Steagall
- Department of Veterinary Clinical Sciences and Centre for Companion Animal Health and Welfare, Jockey Club College of Veterinary Medicine and Life Sciences, City University of Hong Kong, Kowloon, Hong Kong SAR, China
- Department of Clinical Sciences, Faculty of Veterinary Medicine, Université de Montréal, Saint-Hyacinthe, QC, Canada
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Pendyala VV, Pribil S, Schaal V, Sharma K, Jagadesan S, Yu L, Kumar V, Guda C, Gao L. Effects of Acute and Chronic Gabapentin Treatment on Cardiovascular Function of Rats. Cells 2023; 12:2705. [PMID: 38067133 PMCID: PMC10706228 DOI: 10.3390/cells12232705] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2023] [Revised: 11/20/2023] [Accepted: 11/23/2023] [Indexed: 12/18/2023] Open
Abstract
Gabapentin (GBP), a GABA analogue, is primarily used as an anticonvulsant for the treatment of partial seizures and neuropathic pain. Whereas a majority of the side effects are associated with the nervous system, emerging evidence suggests there is a high risk of heart diseases in patients taking GBP. In the present study, we first used a preclinical model of rats to investigate, firstly, the acute cardiovascular responses to GBP (bolus i.v. injection, 50 mg/kg) and secondly the effects of chronic GBP treatment (i.p. 100 mg/kg/day × 7 days) on cardiovascular function and the myocardial proteome. Under isoflurane anesthesia, rat blood pressure (BP), heart rate (HR), and left ventricular (LV) hemodynamics were measured using Millar pressure transducers. The LV myocardium and brain cortex were analyzed by proteomics, bioinformatics, and western blot to explore the molecular mechanisms underlying GBP-induced cardiac dysfunction. In the first experiment, we found that i.v. GBP significantly decreased BP, HR, maximal LV pressure, and maximal and minimal dP/dt, whereas it increased IRP-AdP/dt, Tau, systolic, diastolic, and cycle durations (* p < 0.05 and ** p < 0.01 vs. baseline; n = 4). In the second experiment, we found that chronic GBP treatment resulted in hypotension, bradycardia, and LV systolic dysfunction, with no change in plasma norepinephrine. In the myocardium, we identified 109 differentially expressed proteins involved in calcium pathways, cholesterol metabolism, and galactose metabolism. Notably, we found that calmodulin, a key protein of intracellular calcium signaling, was significantly upregulated by GBP in the heart but not in the brain. In summary, we found that acute and chronic GBP treatments suppressed cardiovascular function in rats, which is attributed to abnormal calcium signaling in cardiomyocytes. These data reveal a novel side effect of GBP independent of the nervous system, providing important translational evidence to suggest that GBP can evoke adverse cardiovascular events by depression of myocardial function.
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Affiliation(s)
- Ved Vasishtha Pendyala
- Department of Anesthesiology, University of Nebraska Medical Center (UNMC), Omaha, NE 68198, USA; (V.V.P.); (S.P.); (V.S.); (L.Y.)
| | - Sarah Pribil
- Department of Anesthesiology, University of Nebraska Medical Center (UNMC), Omaha, NE 68198, USA; (V.V.P.); (S.P.); (V.S.); (L.Y.)
| | - Victoria Schaal
- Department of Anesthesiology, University of Nebraska Medical Center (UNMC), Omaha, NE 68198, USA; (V.V.P.); (S.P.); (V.S.); (L.Y.)
| | - Kanika Sharma
- Mass Spectrometry and Proteomics Core Facility, University of Nebraska Medical Center (UNMC), Omaha, NE 68198, USA; (K.S.); (V.K.)
| | - Sankarasubramanian Jagadesan
- Department of Genetics, Cell Biology and Anatomy, University of Nebraska Medical Center (UNMC), Omaha, NE 68198, USA; (S.J.); (C.G.)
- Center for Biomedical Informatics Research and Innovation, University of Nebraska Medical Center (UNMC), Omaha, NE 68198, USA
| | - Li Yu
- Department of Anesthesiology, University of Nebraska Medical Center (UNMC), Omaha, NE 68198, USA; (V.V.P.); (S.P.); (V.S.); (L.Y.)
| | - Vikas Kumar
- Mass Spectrometry and Proteomics Core Facility, University of Nebraska Medical Center (UNMC), Omaha, NE 68198, USA; (K.S.); (V.K.)
- Department of Genetics, Cell Biology and Anatomy, University of Nebraska Medical Center (UNMC), Omaha, NE 68198, USA; (S.J.); (C.G.)
| | - Chittibabu Guda
- Department of Genetics, Cell Biology and Anatomy, University of Nebraska Medical Center (UNMC), Omaha, NE 68198, USA; (S.J.); (C.G.)
- Center for Biomedical Informatics Research and Innovation, University of Nebraska Medical Center (UNMC), Omaha, NE 68198, USA
| | - Lie Gao
- Department of Anesthesiology, University of Nebraska Medical Center (UNMC), Omaha, NE 68198, USA; (V.V.P.); (S.P.); (V.S.); (L.Y.)
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Di Cesare F, Negro V, Ravasio G, Villa R, Draghi S, Cagnardi P. Gabapentin: Clinical Use and Pharmacokinetics in Dogs, Cats, and Horses. Animals (Basel) 2023; 13:2045. [PMID: 37370556 DOI: 10.3390/ani13122045] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2023] [Revised: 06/16/2023] [Accepted: 06/19/2023] [Indexed: 06/29/2023] Open
Abstract
Gabapentin is an anticonvulsant drug, which presents an established clinical efficacy in human patients for the management of refractory partial seizures, secondarily generalized tonic-clonic seizures, and for the control of chronic neuropathic pain. Gabapentin was synthesized as a structural analogue of the inhibitory neurotransmitter GABA, with GABA-mimetic effects, able to cross the blood-brain barrier. In veterinary medicine, is extra-label used in combination with other treatments to control seizures when other drugs are no longer effective or become toxic or for neuropathic pain treatment and anxiety. This review aimed to clarify gabapentin use and pharmacokinetic aspects to promote conscious use in dogs, cats, and horses. In dogs, gabapentin was beneficial in the treatment of epilepsy, as well as chronic, neuropathic, and post-operative pain, as well as anxiety. In cats, it showed efficacy in post-ovariohysterectomy-related pain and in anxiety management. In horses, gabapentin has been administered as an analgesic for chronic pain management. In conclusion, when used in combination with other drugs, gabapentin can be considered an interesting therapeutic option for the treatment of neuropathic diseases and analgesia in postoperative and chronic pain. However, despite its beneficial use in different clinical settings, further trials and pharmacokinetic studies are needed for the definition of an effective dosage regimen through proper pharmacokinetic/pharmacodynamic correlation in dogs, cats, and horses.
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Affiliation(s)
- Federica Di Cesare
- Department of Veterinary Medicine and Animal Sciences, Università degli Studi di Milano, Via dell'Università 6, 26900 Lodi, Italy
| | - Viviana Negro
- Department of Veterinary Medicine and Animal Sciences, Università degli Studi di Milano, Via dell'Università 6, 26900 Lodi, Italy
| | - Giuliano Ravasio
- Department of Veterinary Medicine and Animal Sciences, Università degli Studi di Milano, Via dell'Università 6, 26900 Lodi, Italy
| | - Roberto Villa
- Department of Veterinary Medicine and Animal Sciences, Università degli Studi di Milano, Via dell'Università 6, 26900 Lodi, Italy
| | - Susanna Draghi
- Department of Veterinary Medicine and Animal Sciences, Università degli Studi di Milano, Via dell'Università 6, 26900 Lodi, Italy
| | - Petra Cagnardi
- Department of Veterinary Medicine and Animal Sciences, Università degli Studi di Milano, Via dell'Università 6, 26900 Lodi, Italy
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Chen H, Yang H, Li M, Peng H, Guo W, Li M. Effect of oral administration of gabapentin on the minimum alveolar concentration of isoflurane in cats. Front Vet Sci 2023; 10:1117313. [PMID: 36865443 PMCID: PMC9972096 DOI: 10.3389/fvets.2023.1117313] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2022] [Accepted: 01/30/2023] [Indexed: 02/16/2023] Open
Abstract
Objective To determine if oral gabapentin decreases the minimum alveolar concentration (MAC) of isoflurane in cats. Study design Prospective, randomized, blinded, crossover, and experimental study. Animals A total of six healthy adult cats (three male, three female) aged 18-42 months, weighing 3.31 ± 0.26 kg. Methods Cats were randomly given oral gabapentin (100 mg cat-1) or placebo 2 h before starting MAC determination, with the crossover treatment given at least 7 days apart. Anesthesia was induced and maintained with isoflurane in oxygen. Isoflurane MAC was determined in duplicate using an iterative bracketing technique and tail clamp method. Hemodynamic and other vital variables were recorded at each stable isoflurane concentration and were compared between gabapentin and placebo treatments at lowest end-tidal isoflurane concentration when cats did not respond to tail clamping. A paired t-test was used to compare normally distributed data, and a Wilcoxon signed-rank test was applied for non-normally distributed data. Significance was set at p < 0.05. Data are mean ± standard deviation. Results Isoflurane MAC in the gabapentin treatment was 1.02 ± 0.11%, which was significantly lower than that in the placebo treatment (1.49 ± 0.12%; p < 0.001), decreasing by 31.58 ± 6.94%. No significant differences were found in cardiovascular and other vital variables between treatments. Conclusion and clinical relevance Oral administration of gabapentin 2 h before starting MAC determination had a significant isoflurane MAC-sparing effect in cats with no observed hemodynamic benefit.
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Affiliation(s)
- Hangbin Chen
- Department of Veterinary Clinical Sciences, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, Jiangsu, China
| | - Huan Yang
- Department of Veterinary Clinical Sciences, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, Jiangsu, China
| | - Mengqing Li
- Department of Veterinary Clinical Sciences, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, Jiangsu, China
| | - Haojie Peng
- Department of Veterinary Clinical Sciences, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, Jiangsu, China
| | - Weibin Guo
- Ainuo Blessing Veterinary Hospital, Guangzhou, Guangdong, China
| | - Meng Li
- Department of Veterinary Clinical Sciences, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, Jiangsu, China,*Correspondence: Meng Li ✉
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de Azevedo AF, Veronezi TM, Zardo IL, Ferronatto JVB, Franck KR, Spiering AG, Nunes LN, da Costa FVA. Does preappointment gabapentin affect neurological examination findings? A prospective, randomized and blinded study in healthy cats. J Feline Med Surg 2023; 25:1098612X221149384. [PMID: 36790148 PMCID: PMC10812070 DOI: 10.1177/1098612x221149384] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/16/2023]
Abstract
OBJECTIVES The aim of this study was to evaluate the influence of a preappointment oral dose of gabapentin on the neurological examination of cats. METHODS A prospective, randomized and blinded clinical trial was conducted in 35 client-owned healthy cats. Cats were scheduled for two appointments and randomly assigned to receive either a placebo or a 100 mg gabapentin capsule prior to the second veterinary visit. A neurological examination was performed during each visit, and the results were compared between groups. Normal/abnormal response rates for each test were based on the number of cats that allowed the test to be performed. RESULTS Gabapentin was administered to 17 cats. Gait and postural reactions were significantly affected in the gabapentin group. Comparing the gabapentin with the placebo groups, proprioceptive ataxia was identified in 4/17 (23.5%) vs 0/18 cats (P = 0.0288); paw placement deficits were seen in 10/11 (90.9%) vs 1/4 (25%) cats; table tactile placement deficits were identified in 13/17 (76.5%) vs 0/18 cats (P <0.0001); hopping deficits were seen in 5/17 (29.4%) vs 0/16 cats (P = 0.0185); and abnormalities on wheelbarrowing and extensor postural thrust were reported in 5/17 (29.4%) vs 0/18 cats (P = 0.0129). These results had no correlation with age or dose/kg received. No significant difference was noted in the assessment of level and content of consciousness, posture, cranial nerves and spinal nerves. No significant differences were noted in test compliance or examination duration. CONCLUSIONS AND RELEVANCE Gabapentin significantly altered gait analyses and postural reactions in this group of healthy cats. The administration of gabapentin could lead to false-positive results and, possibly, an incorrect identification of neurological lesions. In contrast, gabapentin did not impair the assessment of cranial nerves and spinal reflexes, which can be assessed in patients receiving the drug.
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Affiliation(s)
- André F de Azevedo
- Post Graduation Program in Veterinary Sciences, Federal University of Rio Grande do Sul, Porto Alegre, Brazil
| | - Tayná M Veronezi
- Post Graduation Program in Veterinary Sciences, Federal University of Rio Grande do Sul, Porto Alegre, Brazil
| | - Izadora L Zardo
- Post Graduation Program in Veterinary Sciences, Federal University of Rio Grande do Sul, Porto Alegre, Brazil
| | - João VB Ferronatto
- Post Graduation Program in Veterinary Sciences, Federal University of Rio Grande do Sul, Porto Alegre, Brazil
| | - Kirian R Franck
- Post Graduation Program in Veterinary Sciences, Federal University of Rio Grande do Sul, Porto Alegre, Brazil
| | - Adriana G Spiering
- Graduation Program in Veterinary Medicine, Federal University of Rio Grande do Sul, Porto Alegre, Brazil
| | - Luciana N Nunes
- Department of Statistics, Institute of Mathematics, Federal University of Rio Grande do Sul, Porto Alegre, Brazil
| | - Fernanda VA da Costa
- Department of Animal Medicine, Veterinary Faculty, Federal University of Rio Grande do Sul, Porto Alegre, Brazil
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Ruviaro Tuleski GL, Silveira MF, Bastos RF, Pscheidt MJGR, Prieto WDS, Sousa MG. Behavioral and cardiovascular effects of a single dose of gabapentin or melatonin in cats: a randomized, double-blind, placebo-controlled trial. J Feline Med Surg 2022; 24:e524-e534. [PMID: 36350565 PMCID: PMC10812368 DOI: 10.1177/1098612x221124359] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
OBJECTIVES The aim of this study was to verify whether a single oral dose of gabapentin (100 mg) or melatonin (3 mg) given 60 mins before a cardiac evaluation would reduce anxiety without interfering with heart rate (HR), systemic blood pressure (SBP), electrocardiogram (ECG) and echocardiographic indexes. METHODS Seventy-five client-owned healthy cats underwent two sets of cardiac assessments 60 mins apart, randomly divided into gabapentin, melatonin and placebo groups. The interval between treatment and the second ECG and SBP measurement was 60 mins, and 70 mins for echocardiography. A compliance score (CS) classified the behavior, focusing on the ease of handling. RESULTS Most variables did not change between the examinations. The placebo group showed more significant changes (SBP, tricuspid annular plane systolic excursion, HR during echocardiography, aortic flow velocity, S' wave from lateral mitral annulus), but they were not considered to be hemodynamically relevant. Gabapentin and melatonin significantly increased the cats' compliance without interfering with cardiac assessment. Eight cats presented with mild sedation, seven after gabapentin and one after melatonin. No major side effects were observed. CONCLUSIONS AND RELEVANCE Gabapentin tranquilized the cats when it was given 60 mins prior to ECG and SBP measurement, and 70 mins prior to echocardiography, without interfering with systolic echocardiographic indexes. Melatonin also decreased the CS, but without sedation in most cases. The waiting period may have relaxed the cats in the placebo group, resulting in lower SBP measurements. However, this tranquility did not last as some echocardiographic changes signaled a sympathetic predominance.
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Affiliation(s)
- Giovana Lais Ruviaro Tuleski
- Laboratory of Comparative Cardiology, Department of Veterinary Medicine, Federal University of Paraná (UFPR), Curitiba, Paraná, Brazil
| | - Matheus Folgearini Silveira
- Laboratory of Comparative Cardiology, Department of Veterinary Medicine, Federal University of Paraná (UFPR), Curitiba, Paraná, Brazil
| | - Rodrigo Franco Bastos
- Laboratory of Comparative Cardiology, Department of Veterinary Medicine, Federal University of Paraná (UFPR), Curitiba, Paraná, Brazil
| | | | - Wiliam da Silva Prieto
- Laboratory of Comparative Cardiology, Department of Veterinary Medicine, Federal University of Paraná (UFPR), Curitiba, Paraná, Brazil
| | - Marlos G Sousa
- Laboratory of Comparative Cardiology, Department of Veterinary Medicine, Federal University of Paraná (UFPR), Curitiba, Paraná, Brazil
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Veronezi TM, Lopes DJ, Zardo IL, Ferronatto JVB, Trojan MM, Franck KR, de Azevedo AF, Spiering AG, Nunes LN, Fadel L, da Costa FVA. Evaluation of the effects of gabapentin on the physiologic and echocardiographic variables of healthy cats: a prospective, randomized and blinded study. J Feline Med Surg 2022; 24:e498-e504. [PMID: 36383193 PMCID: PMC10812358 DOI: 10.1177/1098612x221131270] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
OBJECTIVES The aim of this study was to evaluate, using echocardiography, the effects of oral administration of a single dose of gabapentin on the physiologic variables (heart rate [HR], respiratory rate [RR] and systolic blood pressure [SBP]) and systolic and diastolic cardiac function of healthy cats. METHODS This was a prospective, randomized and blinded study with 40 healthy cats aged between 6 months and 2 years. The cats' health status was assessed on the first appointment (T1) when they underwent a physical examination, complete blood count, biochemical profile, assessment of physiologic variables and echocardiogram. The echocardiogram was used to measure the left ventricle's (LV) internal diameter during systole and diastole, isovolumic relaxation time, transmitral flow, E-wave deceleration time and HR. The cats were randomly divided into two groups: (1) a treatment group with 20 cats that received a single oral dose of gabapentin (100 mg/cat); and (2) a control group with 20 cats that received a single oral dose of placebo. All variables of the physiologic and echocardiographic variables were re-evaluated 1-3 weeks after T1 (T2), 90 mins after medication or placebo administration. RESULTS There was no difference in the physiologic variables evaluated in both groups. The proportion of cats in the treatment group that had their ventricular filling waves fused on T1 but did not have them fused on T2 was significantly higher (45%) compared with cats in the control group (15%; P = 0.0384). CONCLUSIONS AND RELEVANCE There was no difference between the groups in regard to SBP, HR, RR and echocardiographic variables. Gabapentin improved evaluation of diastolic function on echocardiogram because it reduced the fusion of ventricular filling waves during the evaluation of the diastolic function of the LV. Gabapentin did not cause adverse effects on the cardiovascular hemodynamics of young healthy cats.
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Affiliation(s)
- Tayná M Veronezi
- Post Graduation Program in Veterinary Sciences, Federal University of Rio Grande do Sul, Porto Alegre, Brazil
| | - Daniela J Lopes
- Post Graduation Program in Veterinary Sciences, Federal University of Rio Grande do Sul, Porto Alegre, Brazil
| | - Izadora L Zardo
- Post Graduation Program in Veterinary Sciences, Federal University of Rio Grande do Sul, Porto Alegre, Brazil
| | - João VB Ferronatto
- Post Graduation Program in Veterinary Sciences, Federal University of Rio Grande do Sul, Porto Alegre, Brazil
| | - Marcelo M Trojan
- Post Graduation Program in Veterinary Sciences, Federal University of Rio Grande do Sul, Porto Alegre, Brazil
| | - Kirian R Franck
- Post Graduation Program in Veterinary Sciences, Federal University of Rio Grande do Sul, Porto Alegre, Brazil
| | - André F de Azevedo
- Post Graduation Program in Veterinary Sciences, Federal University of Rio Grande do Sul, Porto Alegre, Brazil
| | - Adriana G Spiering
- Graduation Program in Veterinary Medicine, Federal University of Rio Grande do Sul, Porto Alegre, Brazil
| | - Luciana N Nunes
- Department of Statistics, Institute of Mathematics, Federal University of Rio Grande do Sul, Porto Alegre, Brazil
| | - Leandro Fadel
- Veterinary Teaching Hospital, School of Veterinary Medicine, Lutheran University of Brazil, Porto Alegre, Brazil
| | - Fernanda VA da Costa
- Department of Animal Medicine, Faculty of Veterinary, Federal University of Rio Grande do Sul, Porto Alegre, Brazil
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