Lisdexamfetamine

ADHD and focus

Also known as Vyvanse

Lisdexamfetamine (Vyvanse) is a stimulant for ADHD that starts out inactive — your body converts it into its working form, which makes the effect come on more gradually and last through the day. Like all stimulants, it carries an FDA boxed warning for a high potential for abuse and dependence, so take it exactly as prescribed and guard it carefully. One dose in the morning is the usual rhythm.

How to take it

When

In the morning — an afternoon dose can keep you up half the night.

Food

Appetite loss is the classic side effect. Eat breakfast first and protect your meals.

Avoid

Never share it — it's illegal and dangerous. Store it somewhere secure.

Good to know

Tell your doctor about any personal or family heart history before you start.

Missed a dose?

If it's still morning, take it when you remember. If the day is getting on, skip it — better a foggy afternoon than a sleepless night. Never double up.

Common side effects

Loss of appetite
Trouble sleeping
Dry mouth
Irritability
Stomach upset

Call a doctor if

Chest pain, fainting, or a racing heart — get help now
Seeing or hearing things that aren't there — call the doctor right away
New aggression or severe mood changes
Signs your medicine is being taken or misused by someone else

Educational only. This summary is drawn from public FDA labeling and MedlinePlus and simplified for readability. Your prescription label and your pharmacist always come first — doses and instructions vary from person to person.