Sildenafil will only work when you combine it with sexual stimulation. If nothing turns you on, the pill will not give you an erection.
If you take your first dose of Sildenafil, combine it with sexual stimulation, and don’t feel any effects, wait a little longer. People metabolize the drug at different speeds; depending on your age, weight, and diet. The drug works more quickly by eating a light meal and avoiding alcohol before taking it,
If you have waited a few hours and still are not experiencing any results, call your doctor for medical advice. They may adjust your dose to help it to work as expected.