Pretty much any psych med by itself will affect sex drive. I see folks taking a half a dozen of them, and then another med or two to counteract the side effects. The pdocs tell us that they DON’T because they don’t want us to quit taking them.
Perhaps we should refer to our meds as a “pharmaceutical chastity belt.”
Anything that tweaks your dopamine down is going to get rid of the emotional spark required to have something resembling a sex life. And anything that tweaks UP serotonin receptors does so at the expense of dopamine receptors. See this article, Notes on Anhedonia and SAD.
For men, there’s also the problem of peripheral blood flow – a strictly mechanical problem. Can’t get the old hydraulics to run, eh? Viagra and Cialis work by improving blood flow. Heck, coffee dilates the blood vessels too, and if you brew it at home it’s way cheaper than an ED pill. Diabetes is common cause of ED, so antipsychotics that affect blood sugar (most of the atypicals) might contribute to it.
Maybe the whole idea is to give us drugs that prevent us from breeding lots of little bipolars.