Is vyvanse a stimulant

No. Vyvanse (lisdexamfetamine) is metabolized into dextroamphetamine, a stimulant. Like a narcotic, potential for drug abuse/dependency exists and it is a class II controlled substance. However, vyvanse is NOT a narcotic. A narcotic refers to opiates or opioids (e.g., heroin, morphine, codeine). Vyvanse is an amphetamine.

A different answer:

Yes. Vyvanse is a controlled substance in most countries in the world. Vyvanse is a pro-drug of dextroamphetamine. Dextroamphetamine has valid medical uses (such as ADHD, narcolepsy) but carries a risk of addiction and psychological dependence. For this reason, it is illegal to obtain or use Vyvanse without a prescription from a doctor.