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Active ingredient

Magnesium Sulfate

25 finished FDA listings contain Magnesium Sulfate as their only active ingredient; 28 combination products also contain it.

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FDA NDC Directory

Ingredient names as written by FDA
MAGNESIUM SULFATE, MAGNESIUM SULFATE ANHYDROUS, MAGNESIUM SULFATE, UNSPECIFIED, MAGNESIUM SULFATE, UNSPECIFIED FORM
Dosage forms
Aerosol, Aerosol, Foam, Cream, Crystal, Granule, Granule, For Solution, Spray
Routes
Oral, Topical
Manufacturers / labelers
17
Strengths listed
1 g/g · 1 kg/kg · 100 g/100g · 6 [hp_x]/ml
Brand names in FDA listings
Epsom Salt, Natural Epsom Salt, Royal Epsom Salt, Theraworx Relief For Foot Cramps Foam, Theraworx Relief For Foot Cramps Roll On, Theraworx Relief For Muscle Cramps, Theraworx Relief For Muscle Cramps Roll On, Theraworx Relief For Muscle Cramps Roll-On, Winco Pure 5lb

RxNorm (National Library of Medicine)

Ingredient concept RxCUI 6585

Drugs@FDA applications

Linked only where the FDA listing’s application number matches Drugs@FDA exactly. A listing in the NDC Directory does not by itself mean FDA approval.

No matching Drugs@FDA applications.

Official labeling on DailyMed

Showing the 12 most recent of 25 labels.

Sources: FDA NDC Directory (2026-09-29), RxNorm, Drugs@FDA, DailyMed. Each source’s facts are shown separately as published.