What I'm wondering is if 150mg Of Vyvanse is too high or even a dangerous dose for someone who has been prescribed Adderall XR (Varying doses) for five years and seems to have built a concerning high tolerance to amphetamines. Thanks!
It would certainly appear so. The maximum recommended dose of Vyvanse is 70mg/day.
Adderall and Vyvanse both contain amphetamines and work in a similar way to treat attention deficit hyperactive disorder (ADHD) in adults and children.
Adderall is a mixture of four different kinds of amphetamine salts (one of which is dextroamphetamine) while Vyvanse only contains one salt, called lisdexamfetamine, which only gets converted into dexamphetamine once it is in the body.
Studies have shown that Vyvanse is just as effective as Adderall, and side effects are similar. One advantage of Vyvanse is that it may be less likely to be abused; however, there is no generic form available so it is more costly than generic forms of Adderall. Risk of dependence (coming to rely on the drug) appears similar for both.
The recommended starting dose of Vyvanse 30 mg once daily in the morning in patients ages 6 and above. Dosage may be adjusted in increments of 10 mg or 20 mg at approximately weekly intervals up to maximum dose of 70 mg/day.
No, because Vyvanse is only 1/3 dextroamphetamine, it’s equivalent moreso to 50mg of Dexedrine IR at 150mg. Maximum Dexedrine dose is 60mg, so would not be surprised to see such a conversion depending on dose of Dexedrine or Adderall. Some only get 6 hours active life, some get 12, so 70mg as a recommendation is just a recommendation likely because they don’t produce a larger capsule.
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