隐形药是由Fred  Olen  Ray  执导，Karen  Black  Russ  Tamblyn  Roberto  Correa  等人主演的，于1998年上映，该喜剧片讲述的是：Doug Baily's father is weird, but a strange machine in the garage now makes him invisible too. Its a roller coaster ride of fun and hijinks as Doug tries to turn his invisible dad back to normal again