|Type of medicine||A stimulant|
|Used for||Narcolepsy in adults, and attention deficit hyperactivity disorder (ADHD) in children aged 6-18 years|
|Also known as||Dextroamphetamine (in US); Amfexa®|
|Available as||Tablets, oral solution|
Narcolepsy is a long-term problem that affects your sleep. You feel excessively tired during the daytime but have disturbed sleep during the night. You can also have sleep attacks where you fall asleep at inappropriate times during the day without any warning. Although there is no cure, medicines can help to control the symptoms. Dexamfetamine works by stimulating the central nervous system to increase your alertness and reduce excessive sleepiness during the day. You can, however, develop tolerance to dexamfetamine, so other medicines for narcolepsy (such as modafinil) are often preferred.