Was there when I needed it Ah, the miracles of modern medicine! When a natural male function wasn't functioning, the little blue pill saved the day (or night). Depression is a self-feeding disease. The depression begins to erode other natural functions, which only serves to make one more depressed, which further erodes other natural functions, and... well, I think you get the idea. Having always been a highly sexually-charged individual who often used sex as a means of minimizing the feelings of depression (for a brief while, anyway), when the desire was there but the plumbing was not working it really taxed my self esteem. It eventually helped wear on my relationships. My doctor originally prescribed the 50mg doses. While these worked, I also experienced some lightheadedness (that was not solely based in the sexual moment, unfortunately), and post-coital headaches. ("Not tonight dear, I'll get a headache...") I also experienced a strange side effect: another erection about 12-14 hours later, when I wasn't expecting one. This might seem more of a blessing for someone who was having trouble acheiving an erection the night previous, but I sometimes go places where I wear a kilt and... I think you can imagine the potential for embarrassment... The doctor later suggested that I cut the pills in half. This worked well enough, and with none of the 50mg-dose side effects. (Also doubles your dosages for the money if that works for you.) The Viagra was effective within 30 minutes and as late as 6 hours afterwards. Fortunately, I have not had to rely upon the Viagra in the 18 months since I started taking Wellbutrin for my depression, but it's nice to know that it is available should I need it again.