Unfortunately, antidepressants have a reputation for blocking orgasm.

Which antidepressants are you on? An alternative might be Wellbutrin, which many people say is better with the libido than other drugs.

I'm a guy, so the issues are probably a little different, but I will say that my orgasm problems dissipated after I was on the meds for a while. Currently I take Cymbalta and I'm not having any sexual issues.