Make sure to tell your healthcare provider about all of the medicines you take, including prescription and non-prescription medicines, vitamins, and herbal supplements.
Lisdexamfetamine is changed in the body to another chemical, dextroamphetamine. Dextroamphetamine is a stimulant, although it has effects that are opposite from what would be expected of a stimulant. While stimulants (like caffeine) can cause hyperactivity, lisdexamfetamine (when used in the appropriate dosages) has a calming effect. While the exact way lisdexamfetamine produces a calming effect is not known, it is known that lisdexamfetamine affects chemicals in the brain.