Is it safe to take phenelzine while pregnant?

Maybe, maybe not. Phenelzine is a class c which means there is some possible evidence of fetal effects, but no controlled studies have been done. Most medications are in this class. As with any medication, it is important to weigh the risk to both yourself and your baby compared to the benefit. Discuss with your doctor.
No. It is a category c drug which means we don't know if it will affect baby. It is an older class of antiderpressants.