> Some people have problems with off brands of XR (extended release) that has a different formulation. There's no standardization on the XR process and I think it's vendor specific.
“Aderall” is a mixture of dextroamphetamine and levoamphetamine, in a 3:1 ratio. Unlike some other drugs, both enantiomers have a therapeutic effect, but slightly different effects on the brain.
If one takes pure dextroamphetamine (“Dexedrine”) instead, that is also available as an inactive prodrug lisdexamfetamine (“Vyvanse”). This is different from an XR formulation, in that the drug is absorbed immediately, but lisdexamfetamine itself has no effect on the brain. However, enzymes in your red blood cells gradually convert the lisdexamfetamine to dexamphetamine. The advantage of this, is unlike an XR formulation, there should be no difference between different manufacturers.
I’m currently switching to Vyvanse after 10+ years using adderall. There is no generic formulation (at least in the us) because it came to market in 2007. I’ve had several issues with inconsistent adderall from various generic manufacturers and that issue simply isn’t possible right now with Vyvanse. The downside is, it’s $400 a month without insurance, and $100 a month with good insurance.
Because it’s basically dextroamphetamine with a lysine molecule taped on, the psychoactive effects are really similar, but I’d describe it as cleaner if that makes sense. The “killer feature” of the enzymatic release is it’s basically a fixed timing, whereas with XR formulations of Adderall you have a 50/50 blend of immediate and delayed release 3:1 amphetamines. I believe you are correct, it’s not standardized. This, combined with the acids / bases both hurting overall blood levels (think grapefruit juice) means you just have a wildly inconsistent time over long term use of the medicine. For example, I’ve had pharmacies change generics on me without saying anything, I’ve had an inability to get my preferred generics, and I’ve had days where it’s felt like I took nothing at all. The worst are Nuvo and Mallinckrodt in my experience (IR 10mg 2x/day).
I’ve only been using Vyvanse for a week or so, but I can say it’s a marked improvement for me and the lack of a generic is a huge boon with regards to consistency.
> Vyvanse. The downside is, it’s $400 a month without insurance, and $100 a month with good insurance.
Here in Australia, one month supply (30 tablets) costs 30 USD. The Australian government subsidises prescriptions for all Australian citizens and permanent residents. I believe the actual cost, prior to the subsidy, is around 85 USD. The government negotiates prices with the pharmaceutical manufacturers, and the prices it negotiates are generally less than those that US insurers pay. Manufacturers generally accept less revenue for the Australian market, since if they can't get it subsidised by the Australian government it becomes quite difficult to sell it here.
“Aderall” is a mixture of dextroamphetamine and levoamphetamine, in a 3:1 ratio. Unlike some other drugs, both enantiomers have a therapeutic effect, but slightly different effects on the brain.
If one takes pure dextroamphetamine (“Dexedrine”) instead, that is also available as an inactive prodrug lisdexamfetamine (“Vyvanse”). This is different from an XR formulation, in that the drug is absorbed immediately, but lisdexamfetamine itself has no effect on the brain. However, enzymes in your red blood cells gradually convert the lisdexamfetamine to dexamphetamine. The advantage of this, is unlike an XR formulation, there should be no difference between different manufacturers.