Not rated, but would probably be

PG-13-Thematic Elements involving teen drug and alcohol use, and a disturbing image

Some implied sexual relations between teenagers.

A girl cuts herself. It is shown.

Infrequent mild language.

Teenagers consume alcohol, tobacco, marijuana, cocaine, etc.

A teenage girl consumes LSD.

A teenage girl is shown high on cough medicine.

The whole film is about teenage drug abuse.

The whole movie is pretty intense, as it involves teenage drug use, sex, self-mutilation, boot camp, and family troubles.