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  • Title: Serum salicylate concentrations and endoscopic evaluation of the gastric mucosa in dogs after oral administration of aspirin-containing products.
    Author: Lipowitz AJ, Boulay JP, Klausner JS.
    Journal: Am J Vet Res; 1986 Jul; 47(7):1586-9. PubMed ID: 3740630.
    Abstract:
    The serum salicylate concentration produced by oral administration of plain aspirin and several aspirin-containing products given at 8-hour intervals for 7 treatments was measured in 36 laboratory-conditioned adult dogs. The dogs were randomly allotted to 6 groups of 6 dogs each: group 1 was given plain aspirin at a dosage of 25 mg/kg of body weight: group 2 was given plain aspirin at a dosage of 10 mg/kg; group 3 was given buffered aspirin at a dosage of 25 mg/kg; group 4 was given enteric-coated aspirin at a dosage of 25 mg/kg; group 5 was given buffered aspirin at a dosage of 25 mg/kg; and, group 6 was given a placebo. Serum salicylate concentration was measured at 2-hour intervals for the first 8 hours, and then at 8-hour intervals for the next 40 hours. Following the last dosing, serum salicylate concentration was measured at 2-hour intervals until 56 hours; the final 2 samples were measured at 64 and 72 hours. The effect of aspirin on the gastric mucosa was studied in 12 dogs, 3 each randomly selected from groups 1, 3, 4, and 5. The gastric mucosa of each dog was examined with a fiberoptic gastroscope 3 days before the beginning of treatment; lesions were not seen. The drugs were administered as described and the gastric mucosa of each dog was reexamined at 72 hours. Administration of the aspirin-containing products at 8-hour intervals resulted in sustained therapeutic serum salicylate concentrations (greater than 5 mg/dl) in all dogs, except those of group 2. The greatest fluctuation in serum salicylate concentration was found in dogs of group 4. Gastric lesions were seen only in the 3 dogs of group 1.(ABSTRACT TRUNCATED AT 250 WORDS)
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