There’s a hangover if u take it before your evening fuck, you will wake up with a stiffy raring to go, but it may fade quick. Hangover in the sense of your dick getting hardI have just started using viagra occasionally at 62. I was prescribed 50 mg, maximum is 100 I think. I cut mine and yet to use the full 50. I love it. Erections like I am 18 again. I do get a bit of a headache so I just take some panadol at the same time. I find my erections the next day are enhanced as well