What happens when you take antacid and dxm?

Taking antacids and dextromethorphan (DXM) together can interfere with the absorption of DXM in the body. Antacids, which neutralize stomach acid, may decrease the effectiveness of DXM, potentially altering its intended effects. Additionally, combining these substances can lead to gastrointestinal discomfort or other side effects. It's always best to consult a healthcare professional before mixing medications.