- No acetylsalicylic acid or other nonsteroidal anti-inflammatory drugs (NSAIDs) for 2 days before and for 2 days after pemetrexed disodium infusion (5 days before and for 2 days after pemetrexed disodium infusion for patients taking NSAIDs with a long half-life [e.g., naproxen, refocoxib, or celecoxib])