Magnesium Carbonate

證據等級: L5

預測適應症: 10 個

Magnesium Carbonate: From Antacid (Symptomatic Hyperacidity) to Active Peptic Ulcer Disease

One-Sentence Summary

Magnesium carbonate is a classic acid-neutralizing antacid agent; no formal regulatory-approved indication text is on record, and it is currently not marketed in the reference market. The TxGNN model predicts it may be effective for Active Peptic Ulcer Disease, with 0 clinical trials and 4 publications currently supporting this direction, three of which are randomized controlled trials.

Quick Overview

Item	Content
Original Indication	Antacid (gastric acid neutralization / symptomatic hyperacidity) — no formal approved indication text on record
Predicted New Indication	Active Peptic Ulcer Disease
TxGNN Prediction Score	99.96%
Evidence Level	L2
US Market Status	未上市 (Not Marketed)
Number of NDAs	0
Recommended Decision	Research Question

Why is This Prediction Reasonable?

Detailed mechanism-of-action data is not available in DrugBank for this candidate. Based on known pharmacology, magnesium carbonate is a classic inorganic antacid: MgCO₃ + 2HCl → MgCl₂ + H₂O + CO₂. It neutralizes gastric hydrochloric acid on contact, raises intragastric pH, and reduces pepsin activity — the same mechanistic class documented for related magnesium/aluminum antacid combinations in the evidence pack’s own rationale notes for adjacent indications.

Active peptic ulcer disease is, by definition, an acid-mediated mucosal injury, so acid neutralization is a direct, mechanistically appropriate intervention rather than a distant repurposing leap. Historically, antacids (including magnesium- and aluminum-based combination products such as Novaluzid and Caved-S) were a first-line ulcer treatment before H2-blockers and PPIs became standard, which supports the biological plausibility of this TxGNN prediction — though the supporting literature below largely studies antacid combination products rather than magnesium carbonate as a single agent, so drug-specificity is moderate rather than high.

Clinical Trial Evidence

Currently no related clinical trials registered.

Literature Evidence

PMID	Year	Type	Journal	Key Findings
7034155	1981	RCT	Scandinavian Journal of Gastroenterology	72 patients with duodenal/prepyloric ulcers randomized to cimetidine, antacid suspension + anticholinergic, or placebo; 3-week healing rate was 67% (cimetidine) vs 50% (antacid/anticholinergic), both significantly better than placebo.
3003883	1985	RCT	Scandinavian Journal of Gastroenterology	80 patients with active duodenal ulcer received antacid tablets (1.1 g, 4×/day) alongside high- or low-fiber diets; 4-week healing rates were 67.5% (high-fiber) vs 60% (low-fiber), with no significant difference between diet arms — antacid effect not isolated.
6755656	1982	RCT	Scandinavian Journal of Gastroenterology. Supplement	Companion report to the Ström et al. trial design, comparing antacid/anticholinergic, cimetidine, and placebo in active prepyloric and duodenal ulcer patients; abstract not available.
35720246	2022	In vitro pharmacology	Medicine and Pharmacy Reports	Evaluated the acid-neutralizing capacity (ANC) and other physicochemical properties of antacid products marketed in Morocco; supports class-level mechanism but not clinical efficacy.

US Market Information

Currently not marketed in the reference market (market status: 未上市／Not Marketed). No NDA or license records are on file.

Safety Considerations

Please refer to the package insert for safety information.

Conclusion and Next Steps

Decision: Research Question

Rationale: The mechanistic link is strong (acid neutralization directly addresses peptic ulcer pathophysiology) and three RCTs support antacid efficacy in active ulcer disease, but the trials studied antacid combination products rather than magnesium carbonate as a single agent, and the drug is unmarketed with no NDA on file. This warrants formal research investigation rather than immediate go/hold classification.

To proceed, the following is needed:

TFDA/regulatory label warnings and contraindications (currently a Blocking data gap — required before any S1 safety screening)
DrugBank-sourced mechanism of action for magnesium carbonate specifically (currently a High-severity data gap)
Drug interaction (DDI) data (current query returned no results)
Trials or literature isolating magnesium carbonate as a single agent rather than combination antacid products
Disclaimer

This content is for research purposes only and does not constitute medical advice. Clinical validation is required before any clinical application.