Sorry for my bad English Hi I know people use this if they have penis dysfunction but I want to take it because I never tried it before and curious.

So how exactly do I take this? I think I'm going to have sex with my girlfriend tommorow and we are most likely to be drinking but then I've heard bad things about drinking alcohol and taking viagra. I have the 25mg sildenafil by the way.

Let's say I have sex at 10pm what time should I really be taking it and after that can i drink alcohol?

Also do I get erecrion automatically or do I get it when I feel horny like normal? How do I get rid of the erection? And if I cum will I get erection straight away? If yes how many times can I get erection? Like I said I have the 25mg sildenafil ones.

Sorry I am super new to this appreciate everyone's help

If I miss anything important please tell me thanks.