The typical dose of Tagamet for treating gastric ulcers is either 800 mg at bedtime or 300 mg four times daily (with meals and at bedtime). The dosage usually recommended for gastroesophageal reflux disease is 800 mg twice daily or 400 mg four times daily for 12 weeks. For people using Tagamet HB to prevent heartburn, the typical dose is one 200-mg tablet taken up to 30 minutes before a meal.
The dose of Tagamet® (cimetidine) your healthcare provider recommends will vary depending on a number of factors, including:
- Your age
- The medical condition for which you are being treated
- Other medical conditions you may have
- Other medications you may be taking.
As is always the case, do not adjust your dose unless your healthcare provider specifically instructs you to do so.
The recommended Tagamet dose for duodenal ulcers (upper intestinal ulcers) is Tagamet 800 mg at bedtime. However, your healthcare provider may recommend a lower dose (Tagamet 400 mg at bedtime) or a higher dose (Tagamet 1600 mg at bedtime). Other optional dosages are Tagamet 300 mg four times daily (with meals and at bedtime) or Tagamet 400 mg twice daily. Tagamet can also be used to prevent the duodenal ulcers from returning. After the ulcer is healed, the dose to prevent future duodenal ulcers is Tagamet 400 mg once daily at bedtime.
The recommended Tagamet dose for gastric ulcers (stomach ulcers) is either Tagamet 800 mg at bedtime or Tagamet 300 mg four times daily (with meals and at bedtime).