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A 20-year-old female asked:

if i am 20, 5'2, and weigh 124 lbs, how long should it take for my vyvanse (lisdexamfetamine) to "take effect?"

4 doctor answers9 doctors weighed in
Dr. Olukayode Awosika
Psychiatry 30 years experience
Not Long: Vyvanse (lisdexamfetamine) usually starts working within 1.5 hours of taking it. It attains its maximal effect after about 4 hours and sustains this for up to 12 hours. Food may delay attaining the maximal effect by about an hour.
Dr. Kevin Passer
Child Psychiatry 35 years experience
Right away: Stimulant medications like vyvanse (lisdexamfetamine) tend to work right away, the first day, the first few hours after taking the vyvanse (lisdexamfetamine). Stimulant medications do not build up or take a while to work. In fact, they are taken in the mornings and mostly wear off every evening. If they did not wear off, a person would not be able to sleep. As far as the effects, it depends on what "target symptoms" you are treating.
Dr. Alan Ali
Dr. Alan Ali answered
Psychiatry 32 years experience
Vyvanse (lisdexamfetamine): Usually within an hour, and lasts up to 12 hours, with optimum dose.
Dr. Carla Enriquez
Pediatrics 50 years experience
Depends what : If you mean normalizing the condition, this could take a while. If you mean detectable amounts in the blood stream, it's about 90 minutes. The treatment of adhd with stimulants requires upward titration of the dose to achieve a targeted outcome (the standard of care is normalization). In some patients this occurs quickly, in others it may take some time to get safely to the point of normal.

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Similar questions

A 37-year-old member asked:

What is Vyvanse (lisdexamfetamine) for ?

5 doctor answers23 doctors weighed in
Dr. James Eitner
Family Medicine 34 years experience
ADD and ADHD: It is an approved medication to treat attention deficit disorder and hyperactivity disorders in children and adults.
Dr. Asim Rana
Dr. Asim Rana commented
Psychiatry 27 years experience
Vyvanse is a longer acting form of amphetamine ( lisdexamfetamine) which is a medicine approved for treating ADHD in both adults and children but one should be aware of its addictive potential.
Dec 5, 2012
A 29-year-old member asked:

Side affects of vyvanse (lisdexamfetamine)?

3 doctor answers5 doctors weighed in
Dr. Lourdes Margarita Landron-Garcia
Family Medicine 9 years experience
Side efects: Insomnia, anxiety disorder, palpitation, dependance, like amphetamines can induce to panic attack , panic disorders, agitation, dry mouth, headache, irritability, visual problems, .....
A 20-year-old female asked:

Can I still be prescribed Vyvanse (lisdexamfetamine) over other add medications if I am changing to a new doctor?

2 doctor answers9 doctors weighed in
Dr. Keegan Duchicela
Family Medicine 14 years experience
Yes.: Usually, a good doctor will take a complete medical history and review old records before continuing a medication like vyvanse (lisdexamfetamine). You can facilitate this by bringing in a copy of your medical records from your previous physician. If after reviewing the records and discussing your symptoms, the doctor feels like Vyvanse (lisdexamfetamine) isn't the best medication for you, they will counsel you appropriately.
A 33-year-old member asked:

Can you tell me specifically how the drug Vyvanse (lisdexamfetamine) works?

2 doctor answers8 doctors weighed in
Dr. Kitturah Schomberg-Klaiss
Family Medicine 28 years experience
Prodrug: Vyvase is converted in the liver into detroamphetamine, a stimulant used for adhd.
A 40-year-old member asked:

How long will a Vyvanse (lisdexamfetamine) stay in your system?

1 doctor answer3 doctors weighed in
Dr. Glen Elliott
Child Psychiatry 43 years experience
Over 24 hours: Vyvanse (lisdexamfetamine) is the longest acting oral stimulant; at high enough doses, amphetamine can be detected the next day, although at fairly low concentrations. Still, like with other stimulants, it seems to be effective only on days taken. There is not evidence of which i'm aware that it accumulates over time--though it might at the highest doses.

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Last updated May 8, 2016
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