What illness are these drugs used for?

My friend has been having a few difficulties recently. Last year she was very happy, even though she was sacked for mood swings. This year she has steadily been going downhill. The last couple of months she has been very down. She has taken an overdose, and this weekend she tied a rope around her neck (leaving a mark), and cut off her eyebrows. She has been seen by the crisis team and they have given her medication. She had told them she sometimes hears a radio station through her filling, they now believe that voices tell her to do things, which is upsetting her as she says its not true, They also warned her about alcohol (I can vouch that she doesn't drink). she has been prescribed Olanzapine and Zopiclone and doesn't know what these are for, does anyone know what these are for?