Adults and children 6 years of age and older: At the onset of symptoms, allow 2 tablets to dissolve under the tongue every 4 to 6 hours, up to 2 days maximum. Discontinue as soon as symptoms disappear. Children under 6 years of age: Ask a doctor. Drink plenty of clear fluids to help prevent dehydration cause by diarrhea. Ask a doctor before use if you have fever, bloody or black stool, mucus in your stool. Stop use and ask a doctor if symptoms persist for more than 2 days or worsen. If pregnant or breast-feeding, ask a health professional before use. Keep out of reach of children. In case of accidental overdose, get medical help or contact a Poison Center right away.