Vidalista 2.5 typically starts working within 30 minutes to an hour after ingestion, with its effects lasting for up to 36 hours in some individuals. This extended duration of action is a notable feature of tadalafil compared to other ED medications. Common side effects of Vidalista 2.5 may include headache, dizziness, flushing, nasal congestion, and indigestion. Serious side effects are rare but may include priapism (prolonged erection lasting more than four hours), sudden vision loss, and allergic reactions.