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Use our Plaquenil dosage calculator to check a weight-based daily safety value. Learn the formula, see an example, and know when to ask your care team.
| Parameter | Value | Source |
|---|---|---|
| Retinal-Safety Dose Ceiling | ≤5.0 mg/kg real body weight/day | AAO 2016 revision (Marmor MF, et al. Ophthalmology. 2016;123(6):1386-1394) |
| Previous (2011) Guideline | ≤6.5 mg/kg ideal body weight/day | Superseded by the 2016 revision -- real weight now used instead of ideal weight |
| Toxicity Risk at Recommended Dose | <1% at 5 years, <2% at 10 years, up to ~20% after 20 years | AAO 2016 revision |
| Scope | Long-term chronic autoimmune-disease dosing only | Does not apply to malaria prophylaxis or malaria-treatment dosing (different protocols) |
Need help with a Plaquenil dosage check? Our Plaquenil dosage calculator gives a weight-based daily safety value for long-term use. Enter your weight in pounds or kilos. You can also add your daily dose to compare the two values.
This tool is a guide, not a doctor. It does not set your dose or tell you to change your pills. Your care team must choose the right dose for you.
For long-term use, a common eye-safety guide sets a daily limit of 5 mg per kg of actual body weight.
Formula: Weight in kg × 5 = daily safety value in mg.
If your weight is in pounds, first use this formula:
Weight in kg = weight in pounds ÷ 2.2046226218.
This value is a safety check. It is not a dose plan. Your health, kidney function, and other risks may change what is right for you.
Enter your actual body weight.
Pick pounds (lb) or kilograms (kg).
If you know your daily dose, enter it in mg. This step is not required.
Select the calculate button to see your result.
Read the safety note. Ask your care team if your dose is above the result or if you are not sure what it means.
Say your weight is 60 kg. The math is simple.
60 × 5 = 300 mg per day.
The result is a daily safety value of 300 mg. It does not mean that you should take 300 mg. Your doctor or pharmacist must check your full care plan before any dose choice.
If you weigh 132.28 lb, the tool first changes that value to about 60 kg. It then uses the same formula.
A Plaquenil dosage calculator can help you check a weight-based safety value in a few steps. It can also compare that value with a dose your care team gave you. Use the result to ask clear questions, not to change your medicine on your own.
It is an online tool that uses your weight to work out a daily safety value for long-term use. It does not give a personal dose plan.
It changes pounds to kg when needed. Then it multiplies the weight in kg by 5.
No. Malaria prevention and care use other dose rules. Ask a health care pro for the right plan.
Do not stop or change your pills on your own. Contact the clinician who gave you the dose and ask them to review it.
No. A result below the limit does not prove a dose is safe for you. Your care team must review your health and eye-risk factors.