Deworming Dose and Frequency (WHO Preventive Chemotherapy)
Gives the WHO deworming dose and how often, by group and local worm prevalence.
Open the calculator → Runs in your browser. Data leaves only if you deliberately send a problem report from the interactive tool.
Example
- Group
- Child (12 months to school age)
- Age in months
- 36
- Local soil-transmitted helminth prevalence
- Over 50%
Result: Albendazole 400 mg or mebendazole 500 mg, a single dose.
The tool opens with these values already filled in. Replace them with your own.
What you enter
- Group
- Age in months (child)
- Local soil-transmitted helminth prevalence
- Trimester (pregnant)
- Hookworm/whipworm 20%+ and anemia 40%+ (pregnant)
How this is calculated
Citation
World Health Organization. Guideline: preventive chemotherapy to control soil-transmitted helminth infections in at-risk population groups. Geneva: WHO; 2017. Read the source ↗
A reference and educational tool. Not medical, legal, or financial advice, and not a substitute for clinician judgment.