5-HTP
avoid taking within four weeks of using a monoamine-oxidase (MAO) inhibitor; may cause anxiety, confusion and other potentially serious side effects; consult your doctor before combining with conventional antidepressants.

Ginseng (Panax)
consult your doctor if you are taking an MAO inhibitor

St John's Wort
taking this herb with conventional antidepressants may lead to adverse reactions; consult your doctor.