How safe is proguanil? A post-marketing investigation of side-effects

Abstract
Side-effects of proguanil reported to the Swedish Adverse Drug Reaction (ADR) register from 1981 to 1988 are described and related to sales figures of the drug in Sweden during the same period. One serious reaction, thrombocytopenia, and 7 minor reactions, mainly urticaria and exanthema were believed to be causally related to proguanil intake in an estimated 60 000 users of the drug. Proguanil can be considered a very safe drug but rare hematological side-effects may possibly occur.