What is NDC 79903-100?

79903-100 is the product NDC for Equate Muscle Cramp and Spasm Relief, Magnesium sulfate heptahydrate 6 [hp_X]/100mL liquid, listed with the FDA by Walmart, inc. It has 1 package NDC, shown above in 10- and 11-digit form.

What drug is associated with this NDC?

Equate Muscle Cramp and Spasm Relief (Magnesium sulfate heptahydrate).

What is the active ingredient?

Magnesium sulfate heptahydrate.

Walmart, inc, NDC labeler code 79903. The labeler is the company responsible for the label; it may be the manufacturer, a repackager or a distributor.

What other NDCs exist for Equate Muscle Cramp and Spasm Relief?

None: this is the only finished product listed under this name.

Is there a related HCPCS / J-code?

Not in Med-Code's curated HCPCS directory.

Equate Muscle Cramp and Spasm Relief NDC 79903-100

NDC codes

FDA NDC Directory

Product NDC (as listed)79903-100Labeler and product segments. Claims need a package NDC.

Product NDC at billing width79903-0100Add the package segment from the table below.

Package NDCs as listed with the FDA, and the 11-digit 5-4-2 form used on claims. The highlighted digit is the added leading zero.
Package NDC	11-digit (billing)	Package	Copy
79903-100-18	7990301001879903010018	100 mL in 1 BOTTLE (79903-100-18)Marketed from Apr 19, 2022

How the 11-digit form is made: The product segment has 3 digits, so one leading zero is added to it (5-3-2 → 5-4-2). Formatting the NDC does not by itself make it billable — the product, package and quantity must match what was dispensed or administered, and payer rules apply. Conversion rules

Product information

Brand name (proprietary): Equate Muscle Cramp and Spasm Relief
Generic name (nonproprietary): magnesium sulfate heptahydrate
Active ingredients: Magnesium sulfate heptahydrate — 6 [hp_X]/100mL
Dosage form: Liquid
Route: Topical
Labeler: Walmart, incNDC labeler code 79903
Product type: Over-the-counter drug
Marketing category: Unapproved homeopathic
Marketing start: Apr 19, 2022
Listing expires: Dec 31, 2026
Other FDA classes: Increased Large Intestinal Motility (Physiologic effect)Inhibition Large Intestine Fluid/Electrolyte Absorption (Physiologic effect)Inhibition Small Intestine Fluid/Electrolyte Absorption (Physiologic effect)Magnesium Ion Exchange Activity (Mechanism)Osmotic Activity (Mechanism)Stimulation Large Intestine Fluid/Electrolyte Secretion (Physiologic effect)
Identifiers: Product ID 79903-100_462e8076-724c-ee44-e063-6294a90a8311SPL ID 462e8076-724c-ee44-e063-6294a90a8311SPL set ID dd07a317-abc0-18e8-e053-2995a90ae5a9UNII SK47B8698TUPC 0681131071338
Pharmacologic class: Calculi Dissolution Agent; Osmotic Laxative

Billing references

What Med-Code can say about coding this product, and where each statement comes from. Nothing here is inferred from the name alone.

HCPCS codeNo match

No HCPCS code in Med-Code's directory. Topical products like this are usually dispensed by a pharmacy and billed by NDC.

NDC on a medical claim

N479903010018 followed by a unit qualifier and the quantity

Package 79903-0100-18. Unit qualifiers: F2 (international unit), GR (gram), ME (milligram), ML (milliliter), UN (unit (each)). The qualifier and quantity depend on what was given. About the N4 qualifier

Product label

Current FDA label (SPL), effective Dec 17, 2025.

Indications (excerpt from the label)

Uses Prevents Cramps and Spasms Releases Muscle Tightness Relieves Muscle Soreness

Excerpt only. Read the full label for complete information.

Full label on DailyMed (opens in a new tab)

About NDC 79903-100

What is NDC 79903-100?: 79903-100 is the product NDC for Equate Muscle Cramp and Spasm Relief, Magnesium sulfate heptahydrate 6 [hp_X]/100mL liquid, listed with the FDA by Walmart, inc. It has 1 package NDC, shown above in 10- and 11-digit form.
What drug is associated with this NDC?: Equate Muscle Cramp and Spasm Relief (Magnesium sulfate heptahydrate).
What is the active ingredient?: Magnesium sulfate heptahydrate.
Who is the labeler?: Walmart, inc, NDC labeler code 79903. The labeler is the company responsible for the label; it may be the manufacturer, a repackager or a distributor.
What other NDCs exist for Equate Muscle Cramp and Spasm Relief?: None: this is the only finished product listed under this name.
Is there a related HCPCS / J-code?: Not in Med-Code's curated HCPCS directory. See Billing references above.

Equate Muscle Cramp and Spasm Relief (Magnesium sulfate heptahydrate) NDC 79903-100