Adults and children 12 years of age and older: At the onset of symptoms, dissolve 2 tablets under the tongue every 15 minutes for 1 hour. If necessary, dissolve 2 tablets under the tongue 15 minutes before meals until symptoms are relieved. Children under 12 years of age: Ask a doctor. Stop use and ask a doctor if symptoms persist continuously for more than 7 days or worsen. If you have trouble swallowing or persistent abdominal pain, see a doctor promptly. If pregnant or breast-feeding, ask a health professional before use.