I take paxil, welbutrin X L , and buspar. The paxil creates a significant difficulty in achieving and keeping an erection. So I have a prescription for viagra. It is expensive and doesn't work all the time, but wtf. I have tried cialis, did me no good whatever.
Good luck. There are other tools, the vacuum pump is supposed to work on erection problems. I don't know. The anti depressants like elivil and imprimin (i think they are called tryciclics) had no sexual side effects for me, but lots of other side effects so I wouldn't use them.
If you don't have psychological depression, then you should explore other alternatives than anti depressants.
Good luck with your search