Vidalista contains tadalafil, a PDE5 inhibitor commonly used to treat erectile dysfunction. One of its notable characteristics is its relatively long duration of action compared with some other ED medications. Tadalafil can remain effective for up to about 36 hours in some men. This does not mean that an erection lasts for 36 hours. Instead, the Vidalista 60 mg can help a man achieve an erection when he is sexually stimulated during this period. The exact timing and duration vary between individuals. Factors such as dosage, metabolism, overall health, other medications, and food or alcohol consumption can influence the experience. Tadalafil generally begins working within about 30 to 60 minutes, although individual responses can differ. Common side effects may include headache, indigestion, flushing, nasal congestion, back pain, and muscle aches. A prolonged or painful erection lasting more than four hours requires immediate medical attention.