McLaughlin, Ronald

Committee Member

Mackin, Andrew

Committee Member

Langston, Cory

Committee Member

Lunsford, Kari

Committee Member

Pinchuk, Lesya

Date of Degree


Document Type

Graduate Thesis - Open Access


Little research has been published evaluating the effect of non-steroidal antiinflammatory drugs (NSAIDs) on platelet function in dogs. The effects of aspirin and cyclooxygenase-2 (COX-2) selective NSAIDS on platelet function were evaluated. Eight dogs received aspirin 10 mg/kg PO every 12 hours for 10 days, and then were randomly assigned to 4 groups, with each group receiving one of the following PO for 7 days in a crossover study design: carprofen 2.2 mg/kg every 12 hours, carprofen 4.4 mg/kg every 24 hours, meloxicam 0.2 mg/kg every 24 hours first day then 0.1 mg/kg every 24 hours for 6 days, or deracoxib 2 mg/kg every 24 hours. PFA-100® platelet function analysis with collagen/ADP and collagen/EPI cartridges, viscoelastometry, and urine 11-dehydrothromboxane B2 were evaluated. All drugs significantly prolonged PFA-100® closure times with the collagen/EPI cartridge, but not with collagen/ADP. Urine 11-dehydrothromboxane B2 levels were significantly lower after aspirin but no other drugs.