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Use of Amlodipine in Psittacine Birds: 5 Cases (2010–2018)
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Use of Amlodipine in Psittacine Birds: 5 Cases (2010–2018)
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Use of Amlodipine in Psittacine Birds: 5 Cases (2010–2018)
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Journal Article
Use of Amlodipine in Psittacine Birds: 5 Cases (2010–2018)
2021
Overview
Amlodipine is a calcium channel blocker shown to be effective in lowering blood pressure with minimal adverse effects in mammals. To provide a retrospective evaluation of amlodipine use in psittacine birds, medical records were reviewed for all avian patients prescribed amlodipine for treatment for the presumptive diagnosis of hypertension, based on clinical signs and indirect blood pressure measurements. Five birds were treated with amlodipine between 2010 and 2018. The median age was 33 years (range, 22–37 years) and 3/5 birds presented for ataxia or seizures. The median indirect systolic blood pressure at diagnosis was 243 mm Hg (range, 200–275 mm Hg). In 3/5 birds, amlodipine was the only drug prescribed, whereas, in 2/5 birds, enalapril was also prescribed in addition to amlodipine. In addition to the prescription of enalapril, blood pressure measurements were obtained indirectly, which are variables to be considered in this report. The initial median dose of amlodipine prescribed was 0.4 mg/kg (range, 0.1–0.4 mg/kg) PO q24h. In 3/5 birds, amlodipine administration was increased either in dose or frequency. Median follow-up time was 25 months (range, 2–55 months) after the initiation of amlodipine treatment. Owners in all 5 cases reported improvement of clinical signs by a median time of 2 months (range, 1–15 months). Three of 5 birds (60%) demonstrated a decreasing trend in blood pressure during the first 6 months after treatment with amlodipine was started (average, ≥20% decrease). Prospective, controlled studies are needed to investigate the efficacy of amlodipine in psittacine birds.
Publisher
Association of Avian Veterinarians
