Important Information for Your Healthcare ProviderYou should talk with your healthcare provider prior to taking lisdexamfetamine if you have:
- Heart problems of any kind, including:
- Seizures or epilepsy
- Tourette syndrome
- Glaucoma (a condition of the eye)
- Liver or kidney problems
- Thyroid problems
- A history of drug or alcohol abuse
- Any allergies, including to foods, dyes, or preservatives.
Also, let your healthcare provider know if you are:
- Pregnant or thinking of becoming pregnant (see Vyvanse and Pregnancy)
Make sure to tell your healthcare provider about all of the medicines you take, including prescription and nonprescription medicines, vitamins, and herbal supplements.
(Click Precautions and Warnings With Lisdexamfetamine to learn more, including information on who should not take the drug.)
How Does Lisdexamfetamine Work?
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, when used in the appropriate dosages, lisdexamfetamine has a calming effect. The exact way in which this drug produces a calming effect is not known; however, it is known that lisdexamfetamine affects chemicals in the brain.