Hemodialysis in methyprylon overdose. Some pharmacokinetic considerations.

Serial measurements of serum methyprylon concentration were made in the case of a 14-year-old girl who ingested an overdose of the drug. Our data indicate that, in the presence of high plasma levels of the drug, much longer half-lives than the usually reported four hours may be observed. It is postulated that saturation kinetics may be a possible mechanism for this observation. The striking clinical improvement after six hours of hemodialysis demonstrated the efficacy of this mode of treatment in our patient.