Absence of opioid withdrawal symptoms in patients receiving methadone and the protease inhibitor lopinavir-ritonavir.

Clarke, Susan; Mulcahy, Fiona; Bergin, Colm; Reynolds, Helen; Boyle, Nicola; Barry, Michael; Back, David J · Clin Infect Dis · 2002

prospective_cohort · Level II

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Abstract

A study was designed to determine the interactions, both clinical and pharmacokinetic, between methadone and lopinavir-ritonavir. Results demonstrated a 36% reduction in the methadone area under the plasma concentration-time curve after the introduction of lopinavir-ritonavir, with no coincident symptoms of opioid withdrawal and no requirement for methadone dose adjustment.

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