Vidalista can cause side effects. It contains tadalafil, a PDE5 inhibitor used to treat erectile dysfunction (ED). It works by increasing blood flow to the penis during sexual stimulation. Most side effects are mild and temporary, but some can be serious. Common side effects Headache: One of the most frequently reported effects. Facial flushing: Warmth or redness in the face. Indigestion: Stomach discomfort or heartburn. Back pain: Muscle aches or lower-back discomfort. Nasal congestion: Blocked or stuffy nose. Dizziness: Feeling lightheaded. Muscle pain: Usually temporary. Vidalista Seek emergency medical attention Although rare, serious reactions can include: An erection lasting more than 4 hours (priapism). Sudden loss of vision. Sudden hearing loss. Chest pain or severe breathing difficulty. Severe allergic reactions, including swelling of the face or throat. NHS +2 Important precautions Never take Vidalista with nitrate medicines for chest pain. Avoid excessive alcohol because it can increase dizziness and low blood pressure. Do not combine Vidalista with Cenforce or other erectile dysfunction medicines unless specifically directed by a doctor. Use only the prescribed strength.