Is it safe to take advil (ibuprofen) pm every night as a sleep aid?

Maybe: The active ingredients in advil pm are Ibuprofen and Diphenhydramine (benadryl). Benadryl (diphenhydramine) is an anti-histamine and, as the name implies, the counteract the effect of histamines. Histamine is a neurotransmitter associated with wakefulness and vigilance. If you counteract it, it causes drowsiness and sleep. I would use it only as needed, though, as ibuprofen has some adverse effects.

Discuss with MD: Please see your own physician who knows you and your complete medical history best. Long term use of any medication has possible side effects. Also, it's always best to address issues and causes rather than relying on medications.