Work out the weight-based maximum daily hydroxychloroquine dose for lupus and rheumatoid arthritis, capped at 400 mg.
Result
How to use this tool
Use actual body weight in kg, or pounds with the unit switch.
The rheumatology cap applies to lupus and rheumatoid arthritis.
The prescriber rounds to a practical tablet dose.
Eye screening and prescriber review govern long-term use.
Formula & worked example
At 60 kg the rheumatology maximum is 5 x 60 = 300 mg per day (1.5 x 200 mg tablets, rounded by the prescriber). At 80 kg the uncapped 400 mg is reached exactly, and heavier weights stay capped at 400 mg.
Limitations — read this before you rely on it
Published/labelled maximum only; actual dosing is clinician-determined and malaria regimens differ. This tool is for education only and is not medical advice. Talk to a clinician about any result that worries you, and never change treatment because of a calculator result.
Frequently asked questions
For lupus and rheumatoid arthritis, guidance caps hydroxychloroquine at 5 mg/kg of actual body weight per day, up to 400 mg daily.
Higher long-term doses raise the risk of retinal damage, so the cap and regular eye screening protect vision.
Malaria treatment and prophylaxis use different prescriber regimens; this tool’s daily maximum is the rheumatology cap, not a malaria schedule.
200 mg tablets are the usual strength; the prescriber rounds the calculated dose to a practical tablet regimen.
Anyone with eye disease, severe kidney or liver disease, or interacting medicines needs prescriber review first.