The effect of feeding on the pharmacokinetic variables of two commercially available formulations of omeprazole
2015
Sykes, B. W. | Underwood, C. | McGowan, C. M. | Mills, P. C.
The objectives of this study were to investigate the impact of formulation (enteric coated and buffered) and feeding on pharmacokinetic variables associated with the oral administration of omeprazole in the horse. Six thoroughbred racehorses were studied in a crossover design. Each received 2 g of an enteric coated or buffered formulation in both the fed and fasted state. Plasma omeprazole concentrations were determined by UHPLC‐MS. The effects of feeding or formulation on AUC₀‐ᵢₙf_ₒbₛ, half‐life, Tₘₐₓ or Cₘₐₓ were not statistically significant. However, a wider‐than‐expected degree of variation was present and examination of the raw data suggests that an effect of feeding, wherein the bioavailability of omeprazole may be reduced in the fed animal, may be present. Further investigation in a larger population of animals to assess the factors that contribute to the wide degree of absorption observed is warranted.
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