No: Viagra (sildenafil) by itself does not cause erection, if there is no emotional stimulation. You can take viagra (sildenafil) and go to sleep and it will have worn out by the time you wake up in the morning.
Answered 11/23/2012
5.5k views
Depends: Viagra (sildenafil) can be problematic in people with heart disease, taking anti hypertensive medications and other issues. Check with your prescriber for a full list of precautions.
Answered 12/9/2013
5.5k views
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