Vilitra 40 mg is an oral medication prescribed for erectile dysfunction (ED) in adult men. It contains the active ingredient vardenafil, which belongs to a class of drugs known as phosphodiesterase type‑5 (PDE5) inhibitors. Vardenafil works by blocking the PDE5 enzyme, leading to increased levels of cyclic guanosine monophosphate (cGMP) in the smooth muscle of the *****. This causes relaxation of blood vessels and enhanced blood flow during ***** stimulation, helping men achieve and maintain a firm erection when aroused. Vilitra does not automatically trigger erections — ***** stimulation is required for the drug to work. It is typically taken about 30–60 minutes before planned ***** activity, and effects may last several hours, though individual response varies. Only one tablet should be taken within a 24‑hour period. Common side effects can include headache, flushing, dizziness, nasal congestion, or indigestion. Serious effects are rare but may include prolonged erection, chest pain, or sudden vision/hearing changes — seek medical help if these occur.