U.S. doctors online nowAsk doctors free
A 29-year-old male asked:

I take vyvanse (lisdexamfetamine) 70mg every morning around 7, yet i find it has worn off by 3 - 4 pm. what is a suitable solution?

1 doctor answer3 doctors weighed in
Dr. William Singer
Pediatric Neurology 53 years experience
Increase dose: I would suggest increasing the dose as tolerated until you can achieve effect until about 7 P.M.
Created for people with ongoing healthcare needs but benefits everyone.
Dr. Trevor Desouza
Neurology 46 years experience
As you are already on the maximum recommended dose, you could increase the dose by 10-20mg but may not see the duration increase as you may be a fast metabolizer. If vyvanse is effective until 3-4 pm you may consider adding a booster/extender such as a short acting neuostimulant lasting 2-4 hours.Discuss this with your doctor.
Sep 28, 2017
Last updated Sep 28, 2017


Content on HealthTap (including answers) should not be used for medical advice, diagnosis, or treatment, and interactions on HealthTap do not create a doctor-patient relationship. Never disregard or delay professional medical advice in person because of anything on HealthTap. Call your doctor or 911 if you think you may have a medical emergency.