Vidalista Professional (which contains tadalafil at a higher dose) is used to treat erectile dysfunction (ED), but there are certain patients who should avoid using it or use it with caution. Here's a breakdown of the types of patients who should avoid Vidalista Professional: 1. Patients with Heart Conditions Heart disease or heart-related issues: People who have a history of heart attacks, stroke, or severe heart conditions like arrhythmias (irregular heartbeats) should avoid tadalafil. Tadalafil can lower blood pressure (vasodilation), which might be dangerous for those with heart conditions, especially if combined with other blood pressure medications. 2. Patients Taking Nitrates Nitrate medications (e.g., nitroglycerin, isosorbide dinitrate) are used to treat chest pain or angina. Taking Vidalista Professional with nitrates can cause a severe drop in blood pressure, leading to serious heart problems like fainting, dizziness, or even heart attack. Never use tadalafil with nitrates. 3. Patients with Severe Liver or Kidney Disease Liver disease: Patients with severe liver impairment (like cirrhosis) may have trouble metabolizing tadalafil. This could lead to higher concentrations of the drug in the bloodstream, increasing the risk of side effects. Kidney disease: Those with severe kidney problems may not clear the drug properly, leading to a build-up of tadalafil in the body. In these cases, a lower dose might be considered, but Vidalista Professional (20 mg) should generally be avoided without a doctor's supervision.