The pain reliever most dogs use

A while back Tina had filled a ziplock snack baggie with Tums and Tylenol for a trip to Austin.  This morning I found the chewed up baggie with about 5 tylenols in it.  So, it appears Dillon overdosed on a Antacid-Acetaminophin cocktail.  The evidence was found on the floor outside his little room, so it had to be at least 10 hours ago.  I don't know how many of these pills he ate and not sure how he got a hold of them.  I thought I threw them away a few weeks ago when I cleaned the bedroom.  (the tylenol was making my tums taste weird).  When I let him out this morning, he was his usually perky self and doesn't seem to show any adverse effects.  Well, what could one expect from a dog who once ate a tin can of ant poison!