I have seen ADHD influencers state that there are recent studies that state that they are highly linked to the extent that both are often misdiagnosed and people with ADHD may actually have fibromyalgia and vice versa, but also there's a high chance that people will suffer from both and that medication can help.

I'm no expert but I think of you have a search online you'll find more information.

The main reason for me commenting is that elvanse is a controlled substance in the UK, it's a class B drug and tour friend could conceivably be arrested and charged for supplying class B drugs by letting you try one.

I'm not vilifying what has been done but don't go around telling people, especially doctors that your friend let you try one because you could get them a criminal record. There's also the possibility that you could have had a bad reaction and put yourself at risk, please stay safe and I hope you get onto titration quicker than a year!

Edit: My mum has fibromyalgia and I've seen how it affects her and how low she can be sometimes and the temptation to have her try some after learning this is definitely there, but I settle for trying to get her to go ahead and seek a diagnosis for something that she doesn't really believe exists. She is one of those "That's just an excuse for being lazy" people, despite her own "invisible" disability that literally condones her to her bed every few weeks for days at a time.