Tadaga 5 mg, which contains Tadalafil, can interact with several medications, potentially leading to serious side effects. Avoid taking it with nitrates (used for chest pain), as this can cause a dangerous drop in blood pressure. Alpha-blockers, used for high blood pressure or prostate issues, may also cause dizziness or fainting when combined with Tadaga. Other drugs to avoid include antifungals like ketoconazole, certain antibiotics like erythromycin, HIV medications, and other ED drugs. Always inform your doctor about all prescriptions, over-the-counter drugs, or supplements you’re taking to avoid harmful interactions.