Combantrin Chocolate squares are effective treatment against threadworms, hookworms and roundworms. Treatments are effective as a single dose and dosage will vary based on age and body weight. Store in a cool, dry area and away from heat. If you suspect roundworm or hookworm infection, you should seek medical advice. Take a single dose, after food. Consult your doctor before giving it to children under 2 years of age. Always read the label & use only as directed. If symptoms persist, see your doctor. Statements regarding dietary supplements have not been evaluated by the FDA and are not intended to diagnose, treat, cure, or prevent any disease or health condition.