Positives

• Patients with rheumatoid arthritis on hydroxychloroquine commonly rate it 6.0 out of 10 on Drugs.com across 149 reviews with 43% reporting a positive experience, including one patient who said after a year they had no flares, no pain, and no notable side effects Drugs.com.
• One ME/CFS patient reported a profound anti-inflammatory effect from 200mg hydroxychloroquine, and another said taking 200mg twice daily for 18 months helped their ME symptoms Phoenix Rising.
• Hydroxychloroquine is well-proven to reduce thromboembolic events in lupus and improve endothelial dysfunction, suggesting potential utility for the autoimmune-inflammatory subset of Long COVID patients Clinical Rheumatology.

Negatives

• Reddit-based research analyzing 70,000+ posts on r/covidlonghaulers found that hydroxychloroquine was notably absent from the most-discussed Long COVID self-medications, suggesting it has not generated meaningful patient enthusiasm in the community JMIR Formative Research.
  
  

Hurdles & Side Effects

• Long-term hydroxychloroquine carries a small but real risk of irreversible retinal toxicity, requiring annual ophthalmology monitoring — a barrier for patients without an autoimmune indication who would have to find a willing prescriber American Academy of Ophthalmology.