The recommended dosage for Zantac 150 is one tablet swallowed whole with water, to relieve symptoms of adults and children over 12 years, states the company website. To prevent symptoms, the dosage is one tablet with water taken thirty minutes to one hour before consuming heartburn-causing food or drink.
Patients can take Zantac 150 when heartburn symptoms begin and feel relief within thirty minutes. Do not chew or crush the Zantac 150 tablet, and do not take more than two tablets within a 24-hour period, states the company website. If symptoms last longer than 14 days, consult a doctor. A doctor should also be consulted before giving Zantac 150 to a child younger than 12 years.