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Sodium hydroxide

relieves occasional constipation (irregularity) generally produces bowel movement in 1/2 to 6 hours.

Sold without prescription in some countries Oral Safety alerts on record

How to use Sodium hydroxide

What the official label says. If a doctor prescribed it, follow the prescription. Your pack's leaflet comes first if it is different.

Who it is for

Relieves occasional constipation (irregularity) generally produces bowel movement in 1/2 to 6 hours

How to take it and how often
  • Shake well before use
  • Do not exceed the maximum recommended daily dose in a 24 hour period dose may be taken once a day preferably at bedtime, in divided doses, or as directed by a doctor drink a full glass (8 oz) of liquid with each dose for accurate dosing, only use the dosing cup provided mL = milliliter age dose
  • Adults and children 12 years and over 30 mL to 60 mL
  • Children 6 to 11 years 15 mL to 30 mL
  • Children under 6 years
  • Ask a doctor
Warnings

Ask a doctor before use if you have kidney disease a magnesium-restricted diet stomach pain, nausea, or vomiting a sudden change in bowel habits that lasts over 14 days ​ Ask a doctor or pharmacist before use if you are presently taking a prescription drug. This product may interact with certain prescription drugs. Stop use and ask a doctor if you have rectal bleeding or no bowel movement after using this product. These could be signs of a serious condition. you need to use a laxative for more than 1 week If pregnant or breast-feeding, ask a health professional before use. Keep out of reach of children. …

How to store it

Each 15 mL contains: magnesium 500 mg, sodium 6 mg store at room temperature tightly closed avoid freezing Keep out of reach of children.

If you miss a dose

Take it when you remember, unless it is nearly time for the next dose. Then skip the missed one. Never take two doses at once to make up for it. Check your leaflet, as some medicines are different.

From the official U.S. FDA label for this active ingredient. Your pack may have a different strength, so always read its leaflet. If a doctor prescribed it, follow the prescription. Ask a pharmacist if you are unsure. Label dated 2023-11-08.

Brands around the world

Products with Sodium hydroxide as the active ingredient. Names differ between countries.

Safety alerts and recalls

INON ACE Antacid tablets (magnesium aluminosilicate, magnesium hydroxide and simethicone), 75-count bottle, Manufactured by: Sato Pharmaceutical Co., Ltd., NDC 49873-402-01U.S. FDA Class II
19 Dec 2025 · Sato Pharmaceutical Co., Ltd · OngoingFailed Disintegration Specifications: above the time expected.
MILK OF MAGNESIA USP, 2400 mg/10 mL, Magnesium Hydroxide, 30 mL cup, packaged in 10 cups per tray, 10 trays per carton, For Institutional Use Only, Major Pharmaceuticals, 17177 N LU.S. FDA Class II
7 Jun 2022 · Plastikon Healthcare LLC · TerminatedCGMP Deviations: products manufactured under conditions which reflect manufacturing processes that were not adequately controlled.
Magnesium Hydroxide 2400 mg, Aluminum Hydroxide 2400 mg, Simethicone 240 mg MAX, per 30 mL Oral Suspension, 30 mL cup, packaged in 10 cups per tray, 10 trays per carton, For InstitU.S. FDA Class II
7 Jun 2022 · Plastikon Healthcare LLC · TerminatedCGMP Deviations: products manufactured under conditions which reflect manufacturing processes that were not adequately controlled.
MILK OF MAGNESIA USP, 2400 mg/10 mL, Magnesium Hydroxide, 30 mL cup, packaged in 10 cups per tray, 10 trays per carton, For Institutional Use Only, Major Pharmaceuticals, 17177 N LU.S. FDA Class I
7 Jun 2022 · Plastikon Healthcare LLC · TerminatedMicrobial Contamination of Non-Sterile Products.

A recall usually affects certain batches only. Compare the lot number on your pack.

Check your pack of Sodium hydroxide

Or take photos of the pack
3 free checks left today Official sources: U.S. FDA · EMA (EU) · NAFDAC · WHO alerts

Questions about Sodium hydroxide

What is Sodium hydroxide used for?

relieves occasional constipation (irregularity) generally produces bowel movement in 1/2 to 6 hours (From the official U.S. FDA label.)

How do I take Sodium hydroxide?

Follow your prescription or the leaflet in your pack. The official label says: shake well before use do not exceed the maximum recommended daily dose in a 24 hour period dose may be taken once a day preferably at bedtime, in divided doses, or as directed by a doctor drink a full glass (8 oz) of liquid with each dose for accurate dosing, only use the dosing cup provided mL = milliliter age dose adults and children 12 years and over 30 mL to 60 mL children …

Do I need a prescription for Sodium hydroxide?

In many countries Sodium hydroxide is sold without a prescription in some strengths. Rules differ by country, so ask a pharmacist.

What brands contain Sodium hydroxide?

Sodium hydroxide is sold under names such as Milk Of Magnesia. Brand names differ between countries.

How can I check that my Sodium hydroxide is genuine?

Scan the registration number on your pack with PillVera (NAFDAC number in Nigeria, NDC in the United States, DIN in Canada), check the expiry date and buy only from licensed pharmacies.