I know vyvanse (lisdexamfetamine) is a routine drug. can i take an additional dose one day without my routine being messed up?

Not a good idea if : you already have insomnia ! 70 mg. of Vyvanse (lisdexamfetamine) is the maximum adult daily dose. It lasts 12-14 hours. If you are feeling helpless/hopeless, please tell your psychiatrist. Discuss your treatment regimen & request a referral to a psychologist for Cognitive-Behavioral Therapy ASAP. Also, see your primary doctor to rule out medical causes of or contributors to your insomnia & depression . Take care.

Don't recommend: taking this controlled substance in any manner other than as prescribed.