Don’t worry yourself there.
Just by taking even the *worst* side effect anti depressant wont guarantee limp dick.
The worst, from memory, stilll had 60% of guys with normal erections.
Now, somebody mentioned wellbutrin. This is true. Try that one, although it has wierd side effects of its own, your wille wil be likely rock hard as a rocket.
Always research your meds before taking them. Google search it. There will be a wealth of resources on the net.