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What Is Glycerin?

Glycerin, also called glycerol, is an ingredient used in several types of products. In a rectal suppository, it acts as a laxative for occasional constipation. It helps draw water into the stool and stimulates a bowel movement.

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What Is Glycerin?

Glycerin, also called glycerol, is an ingredient used in several types of products. In a rectal suppository, it acts as a laxative for occasional constipation. It helps draw water into the stool and stimulates a bowel movement.

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How Glycerin Works

Rectal glycerin acts locally in the lower bowel. It helps soften stool and prompts the rectum to empty. A suppository may produce a bowel movement within 15 minutes to one hour.

How to Use Glycerin Suppositories

Insert the suppository into the rectum according to the package directions. Adult products may have different directions from products made for children. Do not use more than the labeled amount or use it for longer than directed.

Possible Side Effects

Glycerin suppositories may cause rectal discomfort or a burning sensation. Stop using the product and seek medical advice if rectal bleeding occurs or constipation persists. Ask a clinician before use if you have abdominal pain, nausea, vomiting, or a lasting change in bowel habits.

Other Uses of Glycerin

Glycerin also appears in skin care products and as an ingredient in medicines. Its purpose depends on the product and how it is used. A skin product should never be substituted for a rectal laxative.

Frequently Asked Questions About Glycerin

How quickly does a glycerin suppository work?

It may produce a bowel movement within 15 minutes to one hour. Follow the timing and directions on your specific product.

Can glycerin suppositories be used every day?

Follow the product label and avoid extended use unless a clinician advises it. Persistent constipation needs medical evaluation.

Is glycerin taken by mouth for constipation?

Glycerin suppositories are for rectal use only. Check the route on the package before using any glycerin product.

Can children use glycerin suppositories?

Some products are made for children, but doses and age limits vary. Choose an age-appropriate product and follow its label.

References

Children's Glycerin Suppositories 1.2 g. DailyMed (National Library of Medicine). https://dailymed.nlm.nih.gov/dailymed/fda/fdaDrugXsl.cfm?setid=80a5a944-2882-4f8d-a955-ef827cead5f0. Date Accessed October 6, 2026.

Constipation in children - Diagnosis & treatment. Mayo Clinic. https://www.mayoclinic.org/diseases-conditions/constipation-in-children/diagnosis-treatment/drc-20354248. Date Accessed October 6, 2026.

Emollients: Creams, Soaps, Moisturizers, Ointments, Benefits. Cleveland Clinic. https://my.clevelandclinic.org/health/treatments/23305-emollients. Date Accessed October 6, 2026.

Glycerin Rectal Suppositories. Cleveland Clinic. https://my.clevelandclinic.org/health/drugs/23729-glycerin-rectal-suppositories. Date Accessed October 6, 2026.

GLYCERIN- glycerin suppository. DailyMed (National Library of Medicine). https://www.dailymed.nlm.nih.gov/dailymed/drugInfo.cfm?setid=94e4a6f3-43d0-b2a5-e053-2a95a90aa115. Date Accessed October 6, 2026.