Tadalista 10 mg (tadalafil) should never be taken with nitrates. This is a serious and potentially life-threatening interaction. Here’s why: Mechanism of Interaction Tadalafil is a PDE5 inhibitor that relaxes blood vessels and lowers blood pressure. Nitrates (used for chest pain or heart conditions, e.g., nitroglycerin, isosorbide dinitrate) also dilate blood vessels and lower blood pressure. Combining the two can cause a dangerous drop in blood pressure, leading to: Dizziness or fainting Heart attack or stroke in severe cases Shock or cardiovascular collapse Guidelines Do not take tadalafil if you are on any nitrate medication, even in the form of sprays, patches, or pills. If you have taken nitrates, wait at least 24–48 hours before using tadalafil (timing depends on the specific nitrate and your doctor’s advice). Always inform your healthcare provider about all heart medications before starting Tadalista. Summary: Tadalista 10 mg is absolutely unsafe with nitrates due to the risk of severe hypotension. This is true for all tadalafil doses, not just 10 mg.