Does mega men vitapak cause bad dreams?

Probably Not. Sometimes introducing something new can temporarily change the sleep cycle. Maybe if there is something in it like caffeine that alters sleep. It seems unlikely though.
Not specifically. No, this vitamin product does not specifically cause bad dreams. However, vitamin b6 can induce more vivid dreaming in some people. This product contains 50mg of vitamin b6, a standard amount of this nutrient.