Benzocaine / Calcium Carbonate / Magnesium Carbonate / Phenobarbital
This combination medication is an older formulation used to treat symptoms of hyperacidity and related gastrointestinal discomfort, including acid reflux, gastritis, and peptic ulcers. It combines antacids for acid neutralization, a local anesthetic for temporary pain relief, and a barbiturate for its sedative and anxiolytic effects.
An older combination of antacid, anesthetic, and sedative used to relieve gastric pain and acidity symptoms.
Key facts at a glance
- RxNorm
- 690250
- Generic
- Benzocaine / Calcium Carbonate / Magnesium Carbonate / 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.
This medication is used to treat conditions associated with excess stomach acid, such as gastritis, peptic ulcers, gastroesophageal reflux disease (GERD), and general gastric discomfort. It may also be prescribed for anxiety-related gastrointestinal symptoms.
Calcium and magnesium carbonates act as antacids by neutralizing stomach acid. Benzocaine provides localized numbing relief to irritated tissues in the esophagus and stomach. Phenobarbital, a barbiturate, produces sedative effects that may help reduce anxiety-related gastric spasms and promote relaxation.
This is an older medication class that is less commonly prescribed today due to the availability of safer alternatives. Phenobarbital carries risks of dependence, tolerance, and withdrawal with prolonged use. It may interact with many medications including blood thinners, other sedatives, and certain antidepressants. Patients should avoid alcohol and inform their doctor of all medications before use.
Official drug label
WellAlly may earn a referral fee from linked resources at no extra cost to you. Editorial content is never influenced by commercial relationships.
This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.
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