Calcium Carbonate / Magnesium Hydroxide / Phenobarbital
This combination medication pairs antacids with a barbiturate sedative. Calcium carbonate and magnesium hydroxide work together to neutralize stomach acid and relieve symptoms of hyperacidity, while phenobarbital provides calming effects that may help manage anxiety or tension associated with digestive discomfort. The medication is typically used for short-term management of acid-related conditions where mild sedation may be beneficial.
A combination antacid-sedative used for relieving stomach acid symptoms accompanied by anxiety or tension.
Key facts at a glance
- RxNorm
- 691014
- Generic
- Calcium Carbonate / Magnesium Hydroxide / Phenobarbital
- Class
- multi-ingredient
- Brands
- —
- Availability
- rx
- Lactation
- unknown
- Routes
- —
- Forms
- —
- Regions
- US, EU, CN, JP
- Monitoring
- —
This page is for informational purposes only.
Do not use this information to diagnose yourself or to replace a physician's advice. Always consult a qualified healthcare provider before starting, stopping, or changing any medication. If you believe you are experiencing a medical emergency, call your local emergency number immediately.
Treatment of gastric hyperacidity conditions such as acid indigestion, heartburn, and gastritis, particularly when associated with anxiety or nervous tension. May also be used as adjunctive therapy in peptic ulcer management.
Calcium carbonate and magnesium hydroxide neutralize excess stomach acid through acid-base reactions, while phenobarbital enhances GABAergic activity in the central nervous system to produce sedative and anxiolytic effects.
May cause drowsiness; avoid alcohol and operating machinery. Not recommended for long-term use due to dependence risk from phenobarbital component. Antacids may affect absorption of other medications. Use with caution in elderly, pregnant women, and patients with liver or kidney impairment. Should not be discontinued abruptly after prolonged use.
Official drug label
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This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.
If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.
Medically reviewed by WellAlly Editorial Team Last reviewed August 28, 2026. · Read our editorial policy