If it was the pill he took on the train (with Buscetta) after the Tahoe shooting, I bet it was Miltown, the universal tranquilizer of the late Fifties and into the Sixties (the Stones sang about it in "Mother's Little Helper").


Ntra la porta tua lu sangu � sparsu,
E nun me mporta si ce muoru accisu...
E s'iddu muoru e vaju mparadisu
Si nun ce truovo a ttia, mancu ce trasu.