Hydroxychloroquine Dose Calculator

Your details

Use your actual (real) body weight. AAO guidelines specify actual body weight, not ideal or lean body weight.
kg
The total hydroxychloroquine (Plaquenil) you take each day, in milligrams. Common doses are 200 mg or 400 mg per day.
mg/day
Enter how long you have been taking hydroxychloroquine to calculate your cumulative dose and refine your retinopathy risk estimate. Leave at 0 to skip.
years
Risk factors include: renal or hepatic impairment, concurrent tamoxifen use, pre-existing retinal disease, age over 60, and obesity. They increase the urgency for earlier ophthalmology screening.
Maximum safe daily doseExceeds safe limit
350mg/day

The AAO 2016 guideline limit: weight x 5 mg/kg, capped at 400 mg/day

Your dose (mg/kg/day)5.71mg/kg/day
Dose margin50 mg/day ABOVE the safe limit
Dose statusExceeds safe limit
Retinopathy risk categoryElevated risk
5.71 mg/kg/day
Well below limit<3Within limit3-5Elevated risk5-6.5High risk6.5+

Your dose of 400 mg/day (5.71 mg/kg/day) exceeds the AAO safe limit of 350 mg/day.

  • The American Academy of Ophthalmology recommends a maximum of 5 mg/kg/day of actual body weight, capped at 400 mg/day, to minimize retinopathy risk.
  • Your current dose is 50 mg/day above the safe limit. Discuss a dose reduction with your prescribing physician.

Next stepSpeak with your prescribing doctor about reducing the daily dose to stay at or below your weight-based safe limit.

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