Effect of procaine penicillin G and flunixin meglumine on serum amyloid A response in healthy adult horses
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The administration of PPG and/or flunixin meglumine does not increase SAA value
This study was designed to determine the effect of PPG and/or flunixin meglumine on SAA response when used at clinical dosing regimens in healthy adult horses.
Six healthy adult horses were enrolled in a crossover study design including one control and three treatment groups: no treatment (control); PPG alone (intramuscularly q12h for 72h); flunixin meglumine alone (intravenously q24h for 72h); and PPG (intramuscularly q12h for 72h) and flunixin meglumine (intravenously q24h for 72h). Whole blood was collected at 0, 24, 48, 72, 96 and 120 hours post-initial drug administration to measure SAA using a commercial lateral-flow immunoassay. The washout period was 30 days.
Result showed that individual SAA values were within the reference range (≤ 20 µg/mL) for almost all horses in the control group. One control horse displayed a SAA value of 28 µg/mL at 72 hours. All horses from the PPG group showed normal SAA values throughout the study. Apart from one horse (SAA of 24 µg/mL at 96 hours) from the flunixin meglumine group, all horses showed normal SAA values. For the PPG and flunixin meglumine group, 5 horses had SAA values within reference range. One horse displayed increased SAA values (32-45 µg/mL) between 48 to 96 hours post-drug administration. There was no difference in area under the SAA time curve amongst control and treatment groups (P > 0.05).
In conclusion, the administration of PPG and/or flunixin meglumine does not trigger an inflammatory response that induces a SAA value above reference range in most adult healthy horses.
“Effect of procaine penicillin G and flunixin meglumine on serum amyloid A response in healthy adult horses” Jurica Trsan, et al. J Equine Vet Sci. 2023 Jul 12;104876. doi: 10.1016/j.jevs.2023.104876.
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