Methylcellulose
Methylcellulose is a bulk-forming laxative that treats constipation by absorbing water in the intestines to form a soft, bulky stool that stimulates natural bowel movements.
A bulk-forming laxative that treats constipation by absorbing water to create softer, bulkier stools.
Key facts at a glance
- ATC
- A06AX03
- RxNorm
- unknown
- Generic
- Methylcellulose
- Class
- atc-a06
- Brands
- Citrucel
- Availability
- otc
- Pregnancy
- C
- Lactation
- caution
- Half-life (h)
- 0
- Onset (min)
- 0
- Duration (h)
- 0
- Routes
- oral, ophthalmic
- Forms
- powder, capsules, eye drops, gel
- Regions
- United States, United Kingdom, Canada, Australia, Europe
- Monitoring
- fluid intake
This page is for informational purposes only.
Do not use this information to diagnose yourself or to replace a physician's advice. Always consult a qualified healthcare provider before starting, stopping, or changing any medication. If you believe you are experiencing a medical emergency, call your local emergency number immediately.
Treatment of constipation, including chronic constipation, and conditions requiring easier stool passage such as hemorrhoids, anal fissures, or postpartum constipation. Also used to promote regular bowel movements.
Methylcellulose absorbs water in the intestinal tract, swelling to form a gel-like substance that adds bulk to stool. This stimulates peristalsis (natural intestinal contractions) and softens stool, promoting regular bowel movements.
Must be taken with at least 8 ounces of liquid to prevent esophageal or intestinal blockage. May take 1-3 days to produce effect. Contraindicated in patients with bowel obstruction, difficulty swallowing, or narrow stool passages. Not for immediate relief of constipation.
Official drug label
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This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.
This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.
If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.
Medically reviewed by WellAlly Editorial Team Last reviewed August 25, 2026. · Read our editorial policy