Sexual dysfunction is very common in us guys. I was on 20mg of Citalopram 2 years ago and shortly after I noticed a drop in libido and an inability to reach orgasm, I could be there for hours with my girlfriend. It's like one of those dreams where you're running down a corridor towards a door and no matter how fast you run the door remains unreachable, it's like a switch that goes off in your head. After coming off, things did improve though : ) Unfortunately I'm now back on 20mg Citalopram due to Health Anxiety and I've noticed the same things, not so much a drop in libido, but the inability to maintain an erection and reach orgasm. I have resorted to Viagra, and although great for maintaining erection, the orgasm still remains illusive and even when I do manage to have one it's disappointing especially considering the amount of effort and time you have to put in. I am 51 and have a very understanding girlfriend. Doctors should highlight this side effect verbally and not dish Citalopram out like sweets.