I think you should. Personally, if my husband was taking something like Viagra, I would want to know. I mean what if he didn't take it once and I tried to engage him in sex? If he couldn't get up I might be worried that it was me, or that there was something else that was wrong. Also sometimes a woman might think that you not being able to get up could be caused from you fooling around or an STD. (Women have a tendency to over analyze things and freak out sometimes.) So I believe you should be open and tell her yes I have this problem, no it's not you, and it shouldn't be a problem because of your pill. Also if she ever stays over she might be very curious about finding the pills so it's best to explain it sooner rather than later.
I wouldn't tell her anything. ED is a personal issue and most women don't like to know that their partners are on Viagra (although they really shouldn't, ED is a mere erection facilitator and does not alter libido or sexual desire).
Thanks for the comments. I have not one to talk to. If I told my guys friends I would never hear the end of it. And I dont trust my friends that are girls not to blab to my GF. I dont have ED real bad. Im just kind of mushy. I take a natural supplement called Endurnz and it helps a lot. I want to tell her. But when? We have been going out for a month. I dont want to loose her cause she thinks i'm defective. But I want to be honest with her too. I have all the passion in bed either way. I love hour long sessions in the bed room. I can do down on her for ever. thats not the problem. Its being hard. And that scares me if he found out that I am not all the man she thinks I am.
Even if you had complete ED that wouldn't make you any less of a man, and I have never known any woman to leave a boyfriend over it. I believe in honesty, but you should definitely go with your guts on it.
We have only been going out for a month. How long should I wait to tell her? Is it better to tell her or leave an endurnz in the bath room and let her ask, like it is not big deal. If I tell her should it be normal over lunch or pillow talk? I DONT KNOW. so many options.....
It really comes down to how you feel about it. It sounds like its more of a sensitive issue for you so it might be easier to not try to do it over lunch or make it seem like it's no big deal. If she thinks it's no big deal she may not know she shouldn't talk to her friends about it. So if you decide to tell her I would suggest making it a more serious conversation. Pillow talk might be a good idea, because afterwards women typically feel elated and intimate she might associate it with sensitivity.