I am 55.5 and was diagnosed with mctd last fall and the rheumatologist prescribed hydroxychloroquine 200 mg once daily and then increased my dose to 200 mg twice daily which I had to back off to every other day due to the ocular toxicity, BUT this drug really hasn’t helped me much. My severe brain fog , fatigue , stomach issues and throat soreness are still there and maybe even worse. I’m keeping a symptom log also. My rheumatologist referred me to another rheumatologist and I also have an appt now with a neurologist. I’m struggling to keep up with my job also. I don’t even think that my rheumatologist fully understands my symptoms and wonders why I would have this much brain fog :-/! Doesn’t help my cause