They are related drugs with similar profiles, but they are not the same drug. Vyvanse is Lisdexamfetamine, which is a pro-drug, that your body converts into dextroamphetamine. This can have a big impact on some people, either making the drugs more or less tolerable. Actual metabolic rates for drugs can be significantly different from person to person.
Adderall and Vyvanse are essentially the same drug. You’re on both?
They are related drugs with similar profiles, but they are not the same drug. Vyvanse is Lisdexamfetamine, which is a pro-drug, that your body converts into dextroamphetamine. This can have a big impact on some people, either making the drugs more or less tolerable. Actual metabolic rates for drugs can be significantly different from person to person.