Taking Tazzle (a brand of tadalafil, used to treat erectile dysfunction) with nitrate medications can lead to a serious and potentially life-threatening side effect: a significant drop in blood pressure. This combination can cause severe hypotension (low blood pressure), leading to symptoms such as dizziness, fainting, heart attack, or stroke. Nitrate medications, often prescribed for chest pain (angina) or heart conditions, include Tazzle drugs like nitroglycerin, isosorbide dinitrate, and isosorbide mononitrate. Both tadalafil and nitrates act as vasodilators, which means they widen blood vessels. When used together, their blood pressure-lowering effects can be dangerously amplified. It is crucial for patients to inform their healthcare provider about all the medications they are taking, especially nitrates, before using tadalafil or any similar medication for erectile dysfunction.