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Hydroxychloroquine Articles
33 articles · Updated daily
🧬 Hydroxychloroquine

Toddler Hydroxychloroquine Ingestion: Risks, Heart Effects and Treatment

One or two hydroxychloroquine tablets can seriously poison a small child. Here is how the drug affects potassium and the heart, and how emergency teams treat it.

toxicologypediatricspoisoning
✍️ Dr. James Harmon, Research Correspondent · 2026-10-26 Read →
🧬 Hydroxychloroquine

Hydroxychloroquine Cardiomyopathy: Mechanism, Warning Signs, Biopsy

Long-term hydroxychloroquine can rarely damage heart muscle by clogging the cell's recycling system. Here is how it happens, which ECG changes matter, and how biopsy confirms it.

cardiologylong-term safetyadverse effects
✍️ Dr. James Harmon, Research Correspondent · 2026-10-26 Read →
🧬 Hydroxychloroquine

Hydroxychloroquine Eye Screening: Dose, OCT Testing, and the 5-Year Mark

Hydroxychloroquine can damage the retina after years of use. Here is how weight-based dosing, OCT and visual field testing, and timing work together to catch it early.

retinopathyophthalmologysafety monitoring
✍️ Dr. James Harmon, Research Correspondent · 2026-10-19 Read →
🧬 Hydroxychloroquine

Hydroxychloroquine in Lupus Pregnancy: Flares, Safety and Heart Block

For pregnant women with lupus, continuing hydroxychloroquine lowers flare risk and appears safe for the baby. It may also reduce the risk of congenital heart block in anti-Ro-positive mothers.

pregnancylupussafety
✍️ Dr. James Harmon, Research Correspondent · 2026-10-05 Read →
🧬 Hydroxychloroquine

Hydroxychloroquine and G6PD Deficiency: Understanding the Risk

Hydroxychloroquine, chloroquine, and primaquine all carry warnings for G6PD deficiency, but their actual hemolysis risk differs sharply by chemistry and dose.

G6PD deficiencysafetymechanism
✍️ Dr. James Harmon, Research Correspondent · 2026-09-22 Read →
🧬 Hydroxychloroquine

Hydroxychloroquine: One Drug, Two Mechanisms Explained

Hydroxychloroquine fights malaria and calms lupus through the same basic trick: making acidic cellular compartments less acidic.

mechanismautoimmune disease
✍️ Dr. James Harmon, Research Correspondent · 2026-09-17 Read →
🧬 Hydroxychloroquine

Chloroquine to Hydroxychloroquine: A History of Resistance

How a bark-derived remedy from the Andes led to two related drugs, and why parasite resistance—not hydroxychloroquine—became malaria's real challenge.

drug historymalariaresistance
✍️ Dr. James Harmon, Research Correspondent · 2026-09-16 Read →
🧬 Hydroxychloroquine

Loading Doses vs Maintenance: The Pharmacokinetics of Hydroxychloroquine

Why hydroxychloroquine takes months to work and months to leave the body—and how its unusual pharmacokinetics shape dosing in lupus and rheumatoid arthritis.

dosingautoimmune diseasepharmacokinetics
✍️ Dr. James Harmon, Research Correspondent · 2026-09-14 Read →
🧬 Hydroxychloroquine

Hydroxychloroquine and Eye Exams: Retinopathy Risk Explained

Hydroxychloroquine can slowly damage the retina after years of use. Here's what the evidence shows about who is most at risk and why regular eye exams matter.

retinopathymonitoringlong-term use
✍️ Dr. James Harmon, Research Correspondent · 2026-09-14 Read →