Abstract

Both radiolabeled and nonlabeled drug have been used to study the pharmacokinetics of flurbiprofen (Ansaid, Upjohn). Drug absorption is rapid, drug disappearance half-life is independent of oral dose, and the area under the plasma drug concentration versus time curve increases with increasing oral dose. Elimination of intact drug from the peripheral circulation is biphasic and rapid. Following a single oral dose of 100 mg of flurbiprofen, drug bioavailability is equivalent using regimens of four 25-mg tablets, two 50-mg tablets, or one 100-mg tablet once daily. Long-term administration of flurbiprofen appears neither to inhibit nor induce the drug's metabolism.

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