Years ago my doc said he could prescribe hydroxychloroquine for my arthritis. Then he told me this:
Hydroxychloroquine may cause side effects. Tell your doctor if any of these symptoms are severe or do not go away:
headache
dizziness
loss of appetite
nausea
diarrhea
stomach pain
vomiting
rash
If you experience any of the following symptoms, call your doctor immediately:
difficulty reading or seeing (words, letters, or parts of objects missing)
sensitivity to light
blurred vision
changes in vision
seeing light flashes or streaks
difficulty hearing
ringing in ears
muscle weakness
unusual bleeding or bruising
bleaching or loss of hair
mood or mental changes
irregular heartbeat
drowsiness
convulsions
decreased consciousness or loss of consciousness
thinking about harming or killing yourself
You can guess what I decided.