This gets said around this subreddit constantly and there just isn’t good evidence supporting it. Studies have shown both people with adhd and neurotypical patients when taking low dose stimulants have improved attention and less locomotor activity. Arnsten AF. Stimulants: Therapeutic actions in ADHD. Neuropsychopharmacology. 2006 Nov;31(11):2376-83. doi: 10.1038/sj.npp.1301164. Epub 2006 Jul 19. PMID: 16855530.
There’s a reason tons of college students take them to study, it works extremely well regardless if you have adhd or not.
I’ve also seen caffeine mentioned but there isn’t much evidence to support that either. Ágoston C, Urbán R, Horváth Z, van den Brink W, Demetrovics Z. Self-Medication of ADHD Symptoms: Does Caffeine Have a Role? Front Psychiatry. 2022 Feb 3;13:813545. doi: 10.3389/fpsyt.2022.813545. PMID: 35185656; PMCID: PMC8850715.
If you truly think you have adhd, talk to a doctor. But don’t bare it off this perceived “paradoxical calming effect”