Anti depressants actually can cause suicidal tendancies.
These "medications" are poison.
YOU need to be there and just listen to her, take her places, treat her out to lunch often, have special times together adn maybe she will start to open up and let you in on why her life is the way it is. Cutting is a cry for help. Dont just give her drugs. But also dont take her off cold turkey either- this could cause her to commit suicide as well!!!
You have to educate yourself about the dangers of these meds. Search the net.
And pray to God you and her find what you are looking for, God is ever waiting to hear our call and ever ready to answer us!