Anyway, last night I was expecting to have sex so took one 100mg
Viagra pill around 9.30PM. Had sex about an hour later and all was good, strong erection throughout the intercourse, no matter I was nervous about it. After I ejaculated the erection normally went away. Girl went home so I went to sleep around midnight without erection. However, I woke up around 6AM with a strong erection and a mild headache, which I know is a side effect of sildenafil.