This is what Squirrel Drama-Poser says works for the Chinese Head Cold in South Africa:

Dexamethasone is used to treat conditions such as arthritis, blood/hormone/immune system disorders, allergic reactions, certain skin and eye conditions, breathing problems, certain bowel disorders, and certain cancers. It is also used as a test for an adrenal gland disorder (Cushing's syndrome).

This medication is a corticosteroid hormone (glucocorticoid). It decreases your body's natural defensive response and reduces symptoms such as swelling and allergic-type reactions.

How to use Dexamethasone

Take this medication by mouth as directed by your doctor. Take with food or milk to prevent stomach upset. Take this medication by mouth with a full glass of water (8 ounces/240 milliliters) unless your doctor directs you otherwise. If you are using the liquid form of the medication, use a medication-measuring device to carefully measure the prescribed dose. Do not use a household spoon.

Side Effects

Stomach upset, headache, dizziness, menstrual changes, trouble sleeping, increased appetite, or weight gain may occur. If any of these effects persist or worsen, notify your doctor or pharmacist promptly.

Remember that your doctor has prescribed this medication because he or she has judged that the benefit to you is greater than the risk of side effects. Many people using this medication do not have serious side effects.

Tell your doctor right away if any of these unlikely but serious side effects occur: signs of infection (e.g., fever, persistent sore throat), bone/joint pain, increased thirst/urination, fast/slow/irregular heartbeat, eye pain/pressure, vision problems, heartburn, puffy face, swelling of the ankles/feet, symptoms of stomach/intestinal bleeding (such as stomach/abdominal pain, black/tarry stools, vomit that looks like coffee grounds), pain/redness/swelling of arms/legs, tiredness, mental/mood changes (e.g., depression, mood swings, agitation), unusual hair/skin growth, muscle pain/cramps, weakness, easy bruising/bleeding, slow wound healing, thinning skin, seizures.

Looks safe enough! WTF is wrong with HCQ?????

https://www.webmd.com/drugs/2/drug-1027-5021/dexamethasone-oral/dexamethasone-oral/details