What Drugs Can You Not Take Together?Two or more drugs that share an active ingredient. You could have side effects or an overdose. Blood-thinning drugs with NSAIDs. Your odds for a dangerous bleed could go up. Pills with antihistamines.Aug 25, 2021
List of Drugs That InteractNonsteroidal anti-inflammatory drugs (NSAIDs) Antacids. Decongestants, such as dextromethorphan or pseudoephedrine. First-generation antihistamines. Certain foods. Herbal products and minerals. Histamine2 (H2)-receptor antagonists such as cimetidine and ranitidine.