Vidalista 40 mg contains tadalafil, a PDE-5 inhibitor used for erectile dysfunction. It is avoided or used with caution in certain heart conditions because tadalafil affects the body’s blood vessel relaxation and blood pressure regulation. Key reasons include: Blood pressure lowering: Tadalafil can cause a mild drop in blood pressure. In people with certain heart problems, this may increase the risk of dizziness, fainting, or reduced blood flow to vital organs. Interaction with nitrate medicines: Men with heart disease are sometimes prescribed nitrates (such as nitroglycerin) for chest pain. Combining nitrates with tadalafil can cause a dangerous, sudden fall in blood pressure. Recent or unstable heart events: People who have recently had a heart attack, stroke, unstable angina (unpredictable chest pain), or severe heart failure may need to avoid ***** activity and ED medicines until their condition is stable. Blood pressure and medication concerns: Some heart and blood-pressure medicines may require a doctor to check whether tadalafil is appropriate. Tadalafil itself is not automatically unsafe for everyone with heart disease—many men with stable cardiovascular conditions can use PDE-5 inhibitors under medical supervision.