Journal of the American Veterinary Medical Association · 2002
Disposition and clinical use of bromide in cats.
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Boothe Dawn Merton, George Kelly L, Couch Pauline
Аннотация
OBJECTIVE: To establish a dosing regimen for potassium bromide and evaluate use of bromide to treat spontaneous seizures in cats.
DESIGN: Prospective and retrospective studies.
ANIMALS: 7 healthy adult male cats and records of 17 cats with seizures.
PROCEDURE: Seven healthy cats were administered potassium bromide (15 mg/kg [6.8 mg/lb], p.o., q 12 h) until steady-state concentrations were reached. Serum samples for pharmacokinetic analysis were obtained weekly until bromide concentrations were not detectable. Clinical data were obtained from records of 17 treated cats.
RESULTS: In the prospective study, maximum serum bromide concentration was 1.1 +/- 0.2 mg/mL at 8 weeks. Mean disappearance half-life was 1.6 +/- 0.2 weeks. Steady state was achieved at a mean of 5.3 +/-1.1 weeks. No adverse effects were detected and bromide was well tolerated. In the retrospective study, administration of bromide (n = 4) or bromide and phenobarbital (3) was associated with eradication of seizures in 7 of 15 cats (serum bromide concentration range, 1.0 to 1.6 mg/mL); however, bromide administration was associated with adverse effects in 8 of 16 cats. Coughing developed in 6 of these cats, leading to euthanasia in 1 cat and discontinuation of bromide administration in 2 cats.
CONCLUSIONS AND CLINICAL RELEVANCE: Therapeutic concentrations of bromide are attained within 2 weeks in cats that receive 30 mg/kg/d (13.6 mg/lb/d) orally. Although somewhat effective in seizure control, the incidence of adverse effects may not warrant routine use of bromide for control of seizures in cats.
DESIGN: Prospective and retrospective studies.
ANIMALS: 7 healthy adult male cats and records of 17 cats with seizures.
PROCEDURE: Seven healthy cats were administered potassium bromide (15 mg/kg [6.8 mg/lb], p.o., q 12 h) until steady-state concentrations were reached. Serum samples for pharmacokinetic analysis were obtained weekly until bromide concentrations were not detectable. Clinical data were obtained from records of 17 treated cats.
RESULTS: In the prospective study, maximum serum bromide concentration was 1.1 +/- 0.2 mg/mL at 8 weeks. Mean disappearance half-life was 1.6 +/- 0.2 weeks. Steady state was achieved at a mean of 5.3 +/-1.1 weeks. No adverse effects were detected and bromide was well tolerated. In the retrospective study, administration of bromide (n = 4) or bromide and phenobarbital (3) was associated with eradication of seizures in 7 of 15 cats (serum bromide concentration range, 1.0 to 1.6 mg/mL); however, bromide administration was associated with adverse effects in 8 of 16 cats. Coughing developed in 6 of these cats, leading to euthanasia in 1 cat and discontinuation of bromide administration in 2 cats.
CONCLUSIONS AND CLINICAL RELEVANCE: Therapeutic concentrations of bromide are attained within 2 weeks in cats that receive 30 mg/kg/d (13.6 mg/lb/d) orally. Although somewhat effective in seizure control, the incidence of adverse effects may not warrant routine use of bromide for control of seizures in cats.