Quick answers
- What is Methylcellulose (4000 mpa.s) used for?
- The Drug Facts label of DRx Choice Fiber Therapy (Raritan Pharmaceuticals Inc) lists these uses: relieves occasional constipation (irregularity); generally produces a bowel movement in 12 -72 hours. Warnings Choking : Taking this product without adequate fluid may cause it to swell and block your throat or esophagus and may cause choking .Do not take this product if you have difficulty in swallowing. If you experience chest pain, vomiting or difficulty in swallowing or breathing after taking this product, seek immediate medical attention. Ask a doctor before use if you have; a sudden change in bowel habits that persists over a period of two weeks; abdominal pain, nausea or vomiting Stop use and ask a doctor if; constipation lasts more than 7 days; you have rectal bleeding These could be signs of a serious condition. Keep out of reach of children. In case of overdose, get medical help or contact a Poison Control Center right away at 1-800-222-1222..
- Do I need a prescription for Methylcellulose (4000 mpa.s)?
- No. The products on this page are sold without a prescription (over the counter).
- Is a store brand the same as the name brand?
- Products listed together below have the same active ingredient, in the same amount and the same form, as registered with the FDA. Inactive ingredients (such as colors, flavors and fillers) and package sizes can differ. Compare the “Active ingredient” box on both packages, and ask a pharmacist if you are not sure.
- Has Methylcellulose (4000 mpa.s) been recalled?
- No recall linked to these products appears in the FDA enforcement reports we use.
Drug Facts label
Every over-the-counter medicine must carry a “Drug Facts” box in the same order, set by FDA rules. Below is the label of one product for each common strength and form, quoted word for word. Your own package can differ (for example, children’s products have other directions): always follow the label on your package.
DRx Choice Fiber Therapy · Raritan Pharmaceuticals Inc
Methylcellulose (4000 mpa.s) 500 mg, tablet (oral)
Active ingredient (in each caplet)
Methylcellulose (a non-allergenic fiber) 500mg
Purpose
Bulk-forming laxative
Uses
- relieves occasional constipation (irregularity)
- generally produces a bowel movement in 12 -72 hours. Warnings Choking : Taking this product without adequate fluid may cause it to swell and block your throat or esophagus and may cause choking .Do not take this product if you have difficulty in swallowing. If you experience chest pain, vomiting or difficulty in swallowing or breathing after taking this product, seek immediate medical attention. Ask a doctor before use if you have
- a sudden change in bowel habits that persists over a period of two weeks
- abdominal pain, nausea or vomiting Stop use and ask a doctor if
- constipation lasts more than 7 days
- you have rectal bleeding These could be signs of a serious condition. Keep out of reach of children. In case of overdose, get medical help or contact a Poison Control Center right away at 1-800-222-1222.
Warnings
Choking : Taking this product without adequate fluid may cause it to swell and block your throat or esophagus and may cause choking .Do not take this product if you have difficulty in swallowing. If you experience chest pain, vomiting or difficulty in swallowing or breathing after taking this product, seek immediate medical attention.
Ask a doctor before use if
you have
- a sudden change in bowel habits that persists over a period of two weeks
- abdominal pain, nausea or vomiting
Stop use and ask a doctor if
- constipation lasts more than 7 days
- you have rectal bleeding These could be signs of a serious condition.
Keep out of reach of children
In case of overdose, get medical help or contact a Poison Control Center right away at 1-800-222-1222.
Directions
Take this product (child or adult dose) with at least 8 ounces (a full glass) of water or other fluid.
- Taking this product without enough liquid may cause choking. See choking warning.
| Age | Dose | Maximum Dose |
| adults & children 12 years of age and over | start with 2 caplets. Increase as needed up to 6 times per day. | Do not exceed 12 caplets per day |
| Children 6-11 years of age | Start with 1 caplet. Increase as needed up to 6 times per day | Do not exceed 6 caplets per day |
| children under 6 years of age | Consult a physician | Consult a physician |
Inactive ingredients
adipic acid, calcium carbonate, crospovidone, FD&C yellow no. 6 lake, magnesium stearate, microcrystalline cellulose, polysorbate 80, silica. Do not use if printed seal under cap is torn or missing.
Questions?
1-866-467-2748
— FDA label of DRx Choice Fiber Therapy, Raritan Pharmaceuticals Inc, effective September 8, 2026. See the official label on DailyMed →
Citrucel · Haleon US Holdings LLC
Methylcellulose (4000 mpa.s) 2 g/10.2 g, powder, for solution (oral)
Active ingredient (in each heaping tablespoon)
CITRUCEL Orange Methylcellulose (a non-allergenic fiber) 2 g Active ingredient (in each rounded tablespoon) CITRUCEL Sugar Free Methylcellulose (a non-allergenic fiber) 2 g
Purpose
Bulk-forming fiber laxative
Uses
relieves occasional constipation (irregularity) generally produces a bowel movement in 12-72 hours
Warnings
Choking: taking this product without adequate fluid may cause it to swell and block your throat or esophagus and may cause choking. Do not take this product if you have difficulty in swallowing. If you experience chest pain, vomiting, or difficulty in swallowing or breathing after taking this product, seek immediate medical attention.
Ask a doctor before use if
you have a sudden change in bowel habits that persists for two weeks abdominal pain, nausea, or vomiting
Stop use and ask a doctor if
(CITRUCEL Orange) constipation lasts more than 7 days you have rectal bleeding you fail to have a bowel movement after use These may be signs of a serious condition.
Stop use and ask a doctor if
(CITRUCEL Sugar Free) constipation lasts more than 7 days you have rectal bleeding you fail to have a bowel movement after use These could be signs of a serious condition.
Keep out of reach of children
In case of overdose, get medical help or contact a Poison Control Center right away.
Directions
MIX THIS PRODUCT (CHILD OR ADULT DOSE) WITH AT LEAST 8 OUNCES (A FULL GLASS) OF WATER OR OTHER FLUID. TAKING THIS PRODUCT WITHOUT ENOUGH LIQUID MAY CAUSE CHOKING. SEE CHOKING WARNING use product at the first sign of constipation or irregularity put one dose in a full glass of cold water stir briskly and drink promptly drinking another glass of water is helpful CITRUCEL Orange
| Age | Dose |
| adults and children 12 years of age and over | start with 1 heaping tablespoon . Increase as needed, 1 heaping tablespoon at a time, up to 3 times per day. |
| children 6 - 11 years of age | start with 2.5 level teaspoons . Increase as needed, 2.5 level teaspoons at a time, up to 3 times per day. |
| children under 6 years of age | consult a doctor |
CITRUCEL Sugar Free
| Age | Dose |
| adults and children 12 years of age and over | start with 1 rounded tablespoon . Increase as needed, 1 rounded tablespoon at a time, up to 3 times per day. |
| children 6 - 11 years of age | start with 2 level teaspoons . Increase as needed, 2 level teaspoons at a time, up to 3 times per day. |
| children under 6 years of age | consult a doctor |
Inactive ingredients
(Citrucel Orange) citric acid, dibasic calcium phosphate, FD&C yellow no. 6 lake, maltodextrin, orange flavors (natural and artificial), potassium citrate, riboflavin, soy lecithin, sucrose, titanium dioxide, tricalcium phosphate Inactive ingredients (Citrucel Sugar Free) aspartame, dibasic calcium phosphate, FD&C yellow no. 6 lake, malic acid, maltodextrin, orange flavors (natural and artificial), potassium citrate, riboflavin, soy lecithin
Questions?
(Citrucel Orange) 1-800-452-0051
— FDA label of Citrucel, Haleon US Holdings LLC, effective March 18, 2026. See the official label on DailyMed →
Fiber Therapy · Preferred Pharmaceuticals Inc.
Methylcellulose (4000 mpa.s) 2 g/19 g, powder, for solution (oral)
Active ingredient (in each 19g adult dose/ rounded tablespoon)
Methylcellulose 2g (a non-allergenic fiber)
Purpose
Bulk-forming fiber laxative
Uses
- relieves constipation (irregularity)
- helps to restore and maintain regularity
- for treating bowel disorders when recommended by a doctor
- generally provide effect in 12-72 hours
Warnings
CHOKING: taking this product without adequate fluid may cause it to swell and block your throat or esophagus and may cause choking. Do not take this product if you have difficulty in swallowing. If you experience chest pain, vomiting, or difficulty in swallowing or breathing after taking this product, seek immediate medical attention.
Ask a doctor before use if
you have
- abdominal pain, nausea or vomiting
- a sudden change in bowel habits that persists over a period of 2 weeks
- sensitivity to any of the ingredients
Stop use and ask a doctor if
- you have rectal bleeding
- you fail to have a bowl movement after use.
- These could be signs of a serious condition.
Keep out of reach of children
In case of overdose, get medical help or contact a Poison Control Center right away at 1-800-222-1222.
When using this product
- do not exceed recommended maximum daily dose unless directed by a doctor
- do not use laxative products for a period longer than one week unless directed by a doctor
Directions
MIX THIS PRODUCT (CHILD OR ADULT DOSE) WITH AT LEAST 8 OUNCES (A FULL GLASS) OF WATER OR OTHER FLUID. TAKING THIS PRODUCT WITHOUT ENOUGH LIQUID MAY CAUSE CHOKING. SEE CHOKING WARNING
- use product at the first sign of constipation or irregularity
- put one dose in a full glass of cold water
- stir briskly and drink promptly
- drinking another glass of water is helpful
| Age | Dose |
| adults & children above 12 years of age and over | one rounded tablespoon. (19 g) in 8 ounces of water fluid up to 3 times daily at the first sign of constipation or irregularity |
| children 6 - 12 years of age | half the adult dose in 8 ounces of water once daily. |
| children under 6 years of age | ask a doctor |
Inactive ingredients
citric acid, FD&C yellow 6 aluminum lake, maltodextrin, flavor (natural and artificial), potassium citrate, silica, sucrose,
Questions?
1-800-616-2471 *This product is not manufactured or distributed by GlaxoSmithKline the distributor of CITRUCEL® Distributed by: MAJOR ® PHARMACEUTICALS 17177 N Laurel Park Drive, Suite 233 Relabeled By: Preferred Pharmaceuticals Inc. Livonia, MI 48152, USA Relabeled By: Preferred Pharmaceuticals Inc. DIRECTIONS FOR USE 1. Fill glass with at least 8 ounces of cold water. 2. Add the adult or child dose listed in the directions. 3. Stir briskly until dissolved and drink promptly. Drinking an additional glass of water is helpful. Image of pouring water into glass Image of stirring water after adding Citrucel
— FDA label of Fiber Therapy, Preferred Pharmaceuticals Inc., effective April 16, 2026. See the official label on DailyMed →
This page is not medical advice. Read the label on your package, and ask a pharmacist or doctor if you are not sure a medicine is right for you, for your child, or with your other medicines.
Same medicine, other brands
Each group lists the products that have exactly the same active ingredient, in the same amount and form, as registered with the FDA (NDC Directory). A store brand in the same group has the same medicine as the name brand; inactive ingredients, flavors and package sizes can differ. Each product links to its own official label.
Methylcellulose (4000 mpa.s) 500 mg · tablet (oral) · 12 products
Drug Facts for this strength and form ↑
| Brand or product name | Company on the label | Label |
|---|---|---|
| Amazon Fiber Therapy | Amazon.Com Services LLC | DailyMed |
| Best Choice Fiber Therapy | Best Choice (Valu Merchandisers Company) | DailyMed |
| CDMA Fiber Therapy | Chain Drug Marketing Association | DailyMed |
| Citrucel | Haleon US Holdings LLC | DailyMed |
| CVS Fiber Therapy | Cvs Pharmacy | DailyMed |
| DRx Choice Fiber Therapy | Raritan Pharmaceuticals Inc | DailyMed |
| equate Fiber Therapy | Wal-Mart Stores, Inc. | DailyMed |
| meijer Fiber Therapy | Meijer Distribution Inc | — |
| Premier Value Fiber Therapy | Pharmacy Value Alliance, LLC | DailyMed |
| QUALITY CHOICE Fiber Therapy | Chain Drug Marketing Association | — |
| Rite Aid Fiber Therapy | Rite Aid Corporation | DailyMed |
| Walgreens Fiber Therapy | Walgreens Co. | DailyMed |
Methylcellulose (4000 mpa.s) 2 g/10.2 g · powder, for solution (oral) · 3 products
Methylcellulose (4000 mpa.s) 2 g/19 g · powder, for solution (oral) · 3 products
Drug Facts for this strength and form ↑
| Brand or product name | Company on the label | Label |
|---|---|---|
| Citrucel | Haleon US Holdings LLC | DailyMed |
| Fiber Therapy | Major Pharmaceuticals | — |
| Fiber Therapy | Preferred Pharmaceuticals Inc. | DailyMed |
What pharmacies pay (NADAC)
The National Average Drug Acquisition Cost (NADAC) is the average price U.S. retail pharmacies paid to buy one unit of a medicine (one tablet, one mL or one gram), from a monthly survey of pharmacy invoices by the Centers for Medicare & Medicaid Services (CMS). State Medicaid programs use it to pay pharmacies.
This is not the price you pay. What you pay depends on your insurance (copay or coinsurance), your pharmacy and any discounts, and pharmacies also charge for filling a prescription. Ask your pharmacist or your health plan what your price will be.
| Strength and form | Generic or brand | Pharmacies pay |
|---|---|---|
| methylcellulose (4000 mpa.s) 2 g/19 g powder, for solution | Generic | $0.0133 per gram |
NADAC list of November 4, 2026; these prices took effect on October 21, 2026. Shown only where a package’s NDC code matches the NADAC list exactly, and only for that exact strength and form: nothing is averaged across strengths. Strengths and forms not listed here have no NADAC price.
Source: NADAC (National Average Drug Acquisition Cost) 2026, data.medicaid.gov (CMS) →
Companies that sell this medicine
The company named on the package (maker or distributor), as listed in the FDA NDC Directory, with its number of over-the-counter products of this medicine.
- Haleon US Holdings LLC3 products
- Chain Drug Marketing Association2 products
- Raritan Pharmaceuticals Inc2 products
- Heb1 product
- Preferred Pharmaceuticals Inc.1 product
- Rite Aid Corporation1 product
- Walgreens Co.1 product
- Cvs Pharmacy1 product
- Pharmacy Value Alliance, LLC1 product
- Wal-Mart Stores, Inc.1 product
- Major Pharmaceuticals1 product
- Best Choice (Valu Merchandisers Company)1 product
- Meijer Distribution Inc1 product
- Amazon.Com Services LLC1 product
Recalls
No recall linked to these products (by their NDC code or label) appears in the FDA enforcement reports.
Sources
- Drug labeling (SPL, openFDA) — U.S. Food and Drug Administration (FDA), FDA data exported October 30, 2026, retrieved October 31, 2026
- NDC Directory (openFDA) — U.S. Food and Drug Administration (FDA), FDA data exported October 30, 2026, retrieved October 31, 2026
- Drug recall enforcement reports (openFDA) — U.S. Food and Drug Administration (FDA), FDA data exported October 27, 2026, retrieved October 31, 2026
- FDA rule for the Drug Facts label (21 CFR 201.66)
Only medicines marketed under FDA rules for nonprescription drugs (an FDA monograph or an FDA approval) are listed. Homeopathic products are not listed: the FDA does not evaluate them for safety or effectiveness.