Very effective. Take without food to help absorption quickly and last longer. Effect does *not* run out in 4 hours. I have taken as little as 10-15 mg and felt the benefits for well over 12 hours. This of course will be different for everyone. Would recommend starting with a very, very low dose. My first dose of 25mg made my penis hurt due to the long lasting and persistent erections. Here are my recommendations and items to consider based on my personal experience: 1. Take without food 1 hour before love-time. It takes a bit to kick in. I have always felt a little "preview" effect of Viagra in about 15 minutes....but then it really kicks in after an hour. To get the Viagra flowing through your penis, manipulate yourself a little (may not take much...just an extra few giggles in the restroom). 2. Drink lots of water. Dehydration is BAD for erections. 3. Pop a couple of tums or rolaids. Viagra can make your stomach acidic. 4. Pop a breath mint as it can give you tart breath. 5. Take a very, very low dose the first time. Also, take it while you are alone so you can get used to how much you really need and the benefits. DON'T take it for the first time with your partner. 6. Don't take it too often because it can make your prostate swell up. So don't take it every other day so you can masturbate for 3 hours. 7. Headaches are common...pop a couple Advil with it. 8. Once you are having sex, it will keep your erection going even if what you are doing doesn't feel that good. This is BAD. You don't want to get used to having sex in positions that don't feel good to you, since your erection will continue, but you may not be able to "get back into it" and have an orgasm. Certainly, there are times when this may be okay, but it gets awkward when you are in bed with a woman, have a rock hard erection, and you can't have an orgasm. Women ask questions. And if she doesn't know you are taking Viagra, she will probably figure it out. Good luck!!! Published: October 07, 2007 ::

Has anyone been instructed by their doctor to take 200mgs of Viagra and if so how did it effect you? Published: February 11, 2008 ::

Works great. I am only 40. Started having problems about a year ago. Got a sample pack from Dr. with 6 pills. The first three I took worked perfectly. Took on empty stomach or at least one hour after a meal. Within an hour, took effect. Makes my face flush and nose run (common side effects) The fourth time I took it, I split the pill in half to see if it would work at lower dose (I was taking a 50mg dose) This DID NOT work. I dont know if it was the lower dose, if it had something to do with what I ate beforehand (Mexican food), or if your not supposed to split them. Also, most of the time, it still has effects several hours after. Even up to the next morning if taken at night. Published: December 24, 2007 ::

Guys, listen up.This is not a cure all. You have to experiment to see what works for you. First, you are paying by the pill and it's crazy exspensive. Buy a pill splitter and cut your price in half or by 75% depending on the dossage you need. It takes practice to get a perfect cut but i'ts worth the effort. If you drink alcohol you'll have to see how much you can consume with out diminishing results which is about 6 beers for me. Also I have found that I can take it at 10 or 11 at night and wake up with a raging hard on the next day which works out perfectly in my relationship and lasts till late afternoon. By the way I'm 50 and had a heart attack when I was 42 . Published: February 11, 2008 ::

I'm pretty young at 41, but I was having problem maintaining an erection throughout the course of sex. It has helped me greatly and improved my wifes satisfaction. Gentlemen if your wife is having to work to hard get this and you may see what I've seen sex better and more often. Published: December 05, 2007 ::

Viagra is Great for us. I have HBP, but this is great. I am 52, and have very little side affects. My Dr. has me prescribed for 100 mg, but I have been cutting them in half, and 50 mg work great. Published: October 20, 2007 ::

I first began having problems maintaing an erection 7 years ago after having first stent placed in corinary arteries. After one year of stuggling with it I mentioned it to my Internst, who just smiled and said he wondered when I would mention it. ED seems to be very common with CAD and all meds that go along with it. Gave me samples of Viagra and Cialis. Viagra is d.rug of choice because the erections I get while using it are much harder than those I get from Cialis. Not knocking Cialis, still use it on occasion, but Viagra is the drug of choice for me Published: December 28, 2007 ::