When on Viagra will I ejaculate and stay hard? - Drugs.com

Answers. You will NOT stay erect, but the refractory period is greatly reduced. After having sex in the evening, I can (and do) easily get an erection well into the next morning. No one here can predict your response to Viagra. Your doctor may prescribe it in the hope it works but even he/she cannot tell you definitively yes or no.

Viagra side effect: Semen volume increased - eHealthMe

The study analyzes which people take Viagra and have Semen volume increased. It is created by eHealthMe based on reports of 61,803 people who have side effects when taking Viagra from the FDA, and is updated regularly. Your drugs can behave differently in the real world. But how do you know?