I know posting this here is a shot in the dark but I have to try, I don't know where to start from.

My friend was diagnosed with severe depression four or five years ago. She tried therapy and was given meds but that seems not to work as things only got worse. She attempted suicide multiple times and all failed. Now she refuses to take therapy sessions and frequently cuts her meds as a form of self-harm.

Earlier this year she went to Sydney, Australia, supposedly for college but it was actually for her to end herself without any hindrance. She would've done that if it was not for her boyfriend who travelled a very far distance to meet her. But he had to return to his home country to study and things have gotten worse for her since. Her worsened condition allows her to be prescribed with stronger drugs, which she claims to be using to either put her in an unconscious state or to end herself, either by overdose or by using a drug cocktail. Her university has a vending machine that she can get drugs from, which she claims to be using to attempt suicide by overdosing.

She currently doesn't have any close friends or guardians with her. I really want to help her, so I want to ask:

1. Is it possible to die from overdosing of depression meds?

2. Are there any known drug cocktails with depression meds that can kill?

3. Do medicine vending machines in Australia allow a person to buy enough meds to kill themselves?

4. I'm planning to contact her university for aid. Should I do it?