Tolerance to sildenafil has been reported, but so has efficacy for up to 4 years without requirement for dose increase. It is possible that tolerance, if any, is due to progression in the organic pathology responsible for the ED.Oct 6, 2015
Tolerance to sildenafil has been reported, but so has efficacy for up to 4 years without requirement for dose increase. It is possible that tolerance, if any, is due to progression in the organic pathology responsible for the ED.Oct 6, 2015