> Amphetamine salts are apparently used to treat ADHD. Some people use them illegally to concentrate for mid terms and finals at college or similar. I'm not personally aware of any valid reason to think they are appropriate for covid19.
There is a study that shows in vitro, it helps fight the flu: https://covid19data.com/2020/03/06/meth-may-fight-flu-virus-...
There are also many reports from meth users that they almost never get sick.