Concomitant use of drugs known to cause interactions with oral antiplatelets-polypharmacy in acute coronary syndrome outpatients in Finland.

Warfarin and ibuprofen were the most commonly used concomitant medications causing pharmacodynamic interactions and potentially increasing the risk of bleeding in OAP-treated patients. Esomeprazole and omeprazole were used in clopidogrel-treated patients although there are alternatives available for gastric protection.