Often prescribed to treat attention-deficit/hyperactivity disorder, the risk was highest in those taking 30 mg or more of dextroamphetamine (which corresponds to 40 mg of Adderall),
The researchers identified 1,374 cases of individuals presenting with first-episode psychosis or mania, compared to 2,748 control patients with a psychiatric hospitalization for other conditions like depression or anxiety. They conducted a comparison analysis of stimulant use over the preceding month and accounted for other factors, including substance use, in order to isolate the effects of stimulants.
They found the attributable risk percentage among those exposed to any prescription amphetamine was nearly 63 percent and for high dose amphetamine was 81 percent. These findings suggest that among people who take prescription amphetamine, 81 percent of cases of psychosis or mania could have been eliminated if they were not on the high dose. While a significant dose-related risk increase was seen in patients taking high doses of amphetamine, no significant risk increase was seen with methylphenidate (Ritalin) use, which is consistent with previous research, including a 2019 study led by Moran.
https://news.harvard.edu/gazette/story/2024/09/high-doses-of...
Among 1,374 case subjects and 2,748 control subjects, the odds of psychosis and mania were increased for individuals with past-month prescription amphetamine use compared with no use (adjusted odds ratio=2.68, 95% CI=1.90–3.77). A dose-response relationship was observed; high doses of amphetamines (>30 mg dextroamphetamine equivalents) were associated with 5.28-fold increased odds of psychosis or mania
https://psychiatryonline.org/doi/10.1176/appi.ajp.20230329
I don't care, the drug isn't safe. I've seen it permanently change many people. I don't care if they handpicked <100 individuals to prove safety. The doses cited above >40mg are pretty typical.
Your own quote literally states that methylphenidate didn't appear to cause any of these problems.
Q: what's the most widely prescribed ADHD medication?
A: Ritalin / Methylphenidate
> Methylphenidate remained the most widely prescribed drug, although the use of lisdexamfetamine and guanfacine has expanded in recent years.
https://pmc.ncbi.nlm.nih.gov/articles/PMC12565614/
It's almost like ... you work with your doctor to identify an effective treatment that balances the costs and benefits for your particular situation.
This applies to most medicines and it's why we have a set of people trained to navigate those tradeoffs. You seem focused only on the negatives of ADHD meds, which are real, without acknowledging that for some patients there are large benefits too. That seems kind of myopic.
Should we also outlaw penicillin because a tiny percentage of people who take too much have negative side effects?
Also the linked Harvard article points out that "no significant risk increase was seen with methylphenidate (Ritalin)".
It isnt stimulants in general, just Adderall, and just when you take too much.