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. 1984 Apr;17(4):447-51.
doi: 10.1111/j.1365-2125.1984.tb02370.x.

The influence of urinary pH on flecainide excretion and its serum pharmacokinetics

K A Muhiddin, A Johnston, P Turner

The influence of urinary pH on flecainide excretion and its serum pharmacokinetics

K A Muhiddin et al. Br J Clin Pharmacol. 1984 Apr.

Abstract

The effect of urinary pH on flecainide excretion has been evaluated in six healthy subjects after a single oral dose of 300 mg flecainide administered as the acetate salt. The cumulative urinary excretion of unchanged flecainide under acidic conditions (134.0 +/- 16.1 mg; mean +/- s.e. mean) was significantly higher than under alkaline conditions (22.3 +/- 7.6 mg; mean +/- s.e. mean) (P less than 0.01). Under alkaline conditions, tmax (time to reach peak concentration) was reduced (P less than 0.01), while elimination half-life, AUC(0-32) and AUC(0-infinity) were increased (P less than 0.01).

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