Adderall vitamin c[Archive] Altering Adderall effects by Vitamin C dose control: Plausible? Advanced Drug DiscussionBest Answer: Avoid drinking fruit juices or taking vitamin C at the same time you take Adderall. . . Take Vitamin C supplements at night time. . was curious if anyone knew of the reaction/interaction of adderall and . Some times in the winter months ( flu season) she takes extra vitamin C along with her Adderall. These can make your body absorb less of the medicine. . If you are ... more