https://www.cdc.gov/coronavirus/2019-ncov/if-you-are-sick/ca...
Ventolin is an inhaler. It opens up the airways during asthma attacks or similar. Pseudoephedrine is a decongestant.
The article under discussion indicates the author was given an inhaler and cough medicine at the ER and states they helped marginally.
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.
Epinephrine is used to treat potentially deadly allergic reactions. You might know it better as "an epi pen."
It is contraindicated for a long list of things, including several heart issues that are potentially similar to the heart distress covid19 is causing in some patients. I'm guessing epinephrine would be a really bad idea to use with Covid19 without a really compelling reason, especially without medical supervision.
https://www.webmd.com/drugs/2/drug-146863/epinephrine-hcl-pf...