As someone who takes dexamphetamine daily for ADHD, it doesn’t fix my brain fog caused by other factors. There’s a number of things that can be causing the brain fog for your friend, and I wouldn’t recommend starting with amphetamines.

For myself I’ve been looking into the anti-inflammatory potential of drugs like semaglutide or tirzepatide as a possibility. For the most part, keeping my allergies in check and my thyroid levels as close to ideal for me as I can get helps way more with fatigue and brain fog than the ADHD drugs do.

It’s interesting that this 2019 article shows this idea isn’t a new one - https://edition.cnn.com/2019/04/21/politics/dhs-fentanyl-wmd/index.html

The fact that they were considering back then has me wondering if this apparently leaked draft EO might have actual substance to it, which is disturbing to say the least.

Just adding my reply here because, although it’s not European, your post did remind me to check my local library in Sydney for DVDs. It’s free to join the City of Sydney network of libraries and they have an extensive range of DVDs to borrow, including very recent TV shows and movies.

I had also been intending to divest myself of Amazon and other streaming services and the like, and thought I’d be buying a whole lot of physical media, but turns out there’s no need as 99% of what I wanted is available through the library!

They also have an enormous range of ebooks and audiobooks available through connections with other services like Libby, Overdrive and Proquest. Definitely worth checking out your library.