Vidalista 10 mg contains tadalafil, and side effects can occur after taking it, although many people have none or only mild effects. In clinical trials of tadalafil 10 mg, commonly reported effects included headache, indigestion, back pain, muscle aches, nasal congestion, and flushing. Side effects may be more likely if you take a higher dose than prescribed, combine tadalafil with certain medicines, or have underlying cardiovascular or blood-pressure problems. Seek urgent medical attention if you develop chest pain, severe dizziness/fainting, sudden vision or hearing loss, or an erection lasting more than 4 hours. If you tell me when you took Vidalista 10 mg and what symptoms you're experiencing, I can explain whether they could be related to tadalafil.