i believe the pills with "ip 111" on them are hydrocod/apap 500 which is generic for vicodin 500mg. i never seen them before and is also curious myself, but i got a prescription for vicodin and that what was in the bottle.
The answer I gave which apparently has been moved was Hydrocodone 5mg., Acetaminophen 500mg. With IP111 on a white Oblong pill. Manufactured by Interpharm. Hope that clears things up. It is what you would "call" a Vicodin because of the Hydrocodone.