Common side effects of tadalafil may include headache, flushing, indigestion, nasal congestion, back pain, muscle aches, and dizziness. These side effects are usually mild to moderate and temporary. However, if you experience severe or persistent side effects, it's important to seek medical attention. Tadalafil typically starts working within 30 minutes to 1 hour after ingestion, though the onset may vary among individuals. It's recommended to take Vidalista 20 mg approximately 30 minutes before anticipated sexual activity for optimal results. https://www.onemedz.com/product/vidalista-20-mg/