It does have some rugged side effects at higher doses, I hope it works for the china virus.
And unusual "special cases" --- which is why you don't want to self-treat. You're gonna need a prescription.
Personal note, I was on 2x 200mg doses daily for 15 years for rheumatoid arthritis. My rheumatologist gave me quarterly blood and urine tests to monitor my levels, and I had a yearly ophthalmologist appt to check for retinopathy. Never had the least problem.