 [ Symptoms ] vyvanse and bc i started taking vyvanse i have been on the bc for years now i am rally good about taking it at the same time i read that taking both pills at the same time can cause you to see more side effects of the bc but i wonder if my birth control is still effective as it normally is in protecting against pregnancy even though i am taking vyvanse i know there are factors that can cause pregnancy but i am wondering when taking both pills is the contraceptive effect of birth control neutralized  [ Disease ] hi found you this webmd link it should help you <link> hope this helps you good luck