PURPOSE: To evaluate the renal function in healthy dogs submitted to nonselective and preferential COX-2 nonsteroidal anti-inflammatory drug (NSAID) therapy. METHODS: Twenty four healthy dogs were distributed into four groups (G) (n=6): ketoprofenG - treated with ketoprofen; nimesulideG - treated with nimesulid; meloxicanG - treated with meloxican; and etodolacG - treated with etodolaco. All the dogs received the NSAIDs for 10 days by oral route. Physical examination and renal function (urinalysis, urinary sodium and gamma-glutamyl transpeptidase (GGT), serum urea, creatinine, potassium and sodium, and endogenous creatinine clearance) were evaluated before, after five and ten days (T0, T5 and T10) of the treatment in all groups. RESULTS: Changes were observed in urinalysis, with a significant increase in renal cells in the urine at T5 and T10 in nimesulideG. Significant reduction in urinary sodium in nimesulideG at T5 was observed. The clearance values were lower in ketoprofenG at T10. CONCLUSIONS: Meloxicam and etodolac were the drugs that have proven to be safer for short-term therapy in healthy dogs in relation to renal function. NSAIDs ketoprofen and nimesulide should be used judiciously in dogs with renal dysfunction, since there are promoted changes in renal function.

O presente estudo teve como objetivo avaliar os efeitos da terapia prolongada com celecoxibe sobre a função renal, hepática e cardíaca em cães hígidos. Foram utilizados 12 cães fêmeas, divididos em 2 grupos: Gcelecoxibe: terapia com celecoxibe, na dose de 5mg kg-1 por via oral, a cada 12 horas, durante 20 dias (peso médio de 8,9±1,6); Gcontrole: terapia com placebo, a cada 12 horas, por via oral, 20 dias (peso médio de 9,8±1,8). O exame físico, a função renal (urinálise; gamaglutamil transpeptidase -GGT e sódio urinários; ureia, creatinina, sódio e potássio séricos; e clearance endógeno de creatinina), tempo de coagulação (TC), biomarcadores cardíacos (creatinofosfoquinase -CK e creatinofosfoquinase fração MB- CK-MB) e função hepática (alanina aminotransferase -ALT, aspartato aminotransferase -AST e albumina) foram avaliados antes, aos 5, 10 e 20 dias (T0, T5, T10 e T20) do tratamento. No Gcelecoxibe, os valores de clearance de creatinina revelaram diminuição significativa no T20, em relação ao T0 e T5, bem como redução em relação ao Gcontrole em T10 e T20. A urinálise, sódio, potássio, ureia e creatinina séricos, enzima GGT urinária e o TC não apresentaram variação entre os momentos ou grupos avaliados. Houve aumento significativo de CK-MB no T20 e ALT no T5, T10 e T20 no Gcelecoxibe, entretanto, com valores dentro da normalidade para cães. Conclui-se que o celecoxibe revelou-se seguro em relação ao perfil cardíaco e hepático em cães sadios, mesmo sob terapia prolongada. Sob vigência de terapia prolongada, deve ser usado cautelosamente em cães portadores de alterações renais.

The aim of this study was to evaluate the effects of long-term celecoxib therapy on renal, hepatic and cardiac profiles in healthy dogs. Twelve female were randomly assigned to 2 groups (G): Gcelecoxib: treated with celecoxib orally (5mg kg-1), every 12 hours, for 20 days (8.9±1.6 body weight); Gcontrol: received placebo orally, every 12 hours, for 20 days (9.8±1.8 body weight). Physical examination, renal function (urinalysis, urinary sodium and gamma-glutamyl transpeptidase -GGT), serum urea, creatinine, potassium and sodium, and endogenous creatinine clearance), clotting time (CT), cardiac biomarkers (creatine phosphokinase -CK and CK-MB) and liver function (aspartate aminotransferase -AST, alanine aminotransferase -ALT and albumin) were evaluated before, at 5, 10 and 20 days (T0, T5, T10 and T20) of treatment. The creatinine clearance values showed significant decrease at T20, in relation to T0 and T5 in the Gcelecoxib, and reduction in relation to Gcontrol at T10 and T20. The urinalysis, values of sodium, potassium, urea and creatinine serum and urinary GGT enzyme showed no difference through the study between moments or groups. There was a significant increase on CK values at T20 and on ALT values at T5, T10 and T20 in the Gcelecoxib, however with normal range values for dogs. Celecoxib revealed to be safe in relation to cardiac and hepatic profiles, even under prolonged therapy. However, it should be used judiciously during long-term therapy in dogs with renal dysfunction.