Buy Citrucel Online (Methylcellulose)
What is Citrucel?
What is Citrucel?
Citrucel (methylcellulose) is a fiber supplement used to relieve occasional constipation and aid in digestive health. Citrucel contains methylcellulose fiber and may be used to treat other conditions as determined by your healthcare provider. It is available over-the-counter (OTC).
Purchase Citrucel on Universal Drugstore and save today!
Order Citrucel online today and save!
Purchase Citrucel from Universal Drugstore today and save!
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- All Strength's
- 500mg
Citrucel brand
Citrucel 500mg
Currently Unavailable
Product of United Kingdom
Marketed as Celevac in United Kingdom.
Methylcellulose (generic Citrucel)
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Important information about Citrucel
The active ingredient in Citrucel is methylcellulose. Methylcellulose is a type of soluble fiber that makes stool softer, and it’s also known as a bulk-forming fiber laxative. It works by pulling water from your intestines into the stool so the stool is easier to pass, thus increasing bowel movements. Through this mechanism, Citrucel results in constipation relief.
Follow all directions given to you by your doctor and read all documents provided, including the full Prescribing Information, FDA-Approved Product Labeling, Instructions for Use, and Medication Guide before using Citrucel. However, the following is a synopsis of the general guidelines for the use of Citrucel:
- Always take Citrucel with a full glass of water. If you don’t drink enough fluids, there is a risk of choking. For additional information, please see the warnings below.
- For Citrucel caplets:
- The recommended dose for adults and children 12 years old and over is 2 caplets by mouth. Then, you can increase as needed up to 6 times per day. Do not take more than 12 caplets per day.
- The recommended dose for children 6-11 years old is 1 caplet, then increasing as needed up to 6 times per day. Do not take more than 6 caplets per day.
- For children under 6 years of age, consult your healthcare professional.
- For Citrucel Orange (Citrucel powder orange flavor):
- The recommended dose for adults and children 12 years old and over is 1 heaping tablespoon mixed in a full glass of cold water, increasing as needed 1 heaping tablespoon at a time, up to 3 times per day.
- The recommended dose for children 6-11 years old is 2.5 level teaspoons mixed in a full glass of cold water, then increasing as needed 2.5 level teaspoons at a time, up to 3 times per day.
- For children under 6 years of age, consult your healthcare professional.
- If constipation symptoms last longer than 7 days or rectal bleeding occurs at any time, contact your healthcare provider.
- Citrucel products are gluten-free.
- Citrucel Sugar Free contains phenylalanine. Do not use this medication if you have phenylketonuria.
The most common side effects of Citrucel seen in clinical trials as compared to placebo include:
- Bloating or excess gas.
- Abdominal pain.
- Cramping.
Some individuals may experience serious side effects while using Citrucel. These side effects may require immediate medical attention. If you experience any of the following, contact your healthcare provider or seek emergency medical help:
- Allergic reaction. Signs include hives, rash, or swelling of the face, lips, or tongue.
- Choking. Seek immediate medical attention if you notice chest pain, vomiting, or difficulty swallowing or breathing.
These are not all of the possible side effects of Citrucel. You should always seek medical advice from your healthcare provider for any questions or concerns about your medical condition or treatment. Read all patient information, medication guides, or drug information sheets that come with this medication. You can also report adverse effects to the Food and Drug Administration at www.fda.gov/medwatch or 1-800-FDA-1088.
Before starting Citrucel, it is crucial to discuss any existing health conditions with your healthcare provider. You should be sure that your healthcare provider is aware of all your medical conditions, including if you have:
- Rectal bleeding.
- Sudden changes in bowel movements.
- Stomach pain.
- Nausea or vomiting.
Boxed Warning
- There is a risk of choking if you take Citrucel without enough fluids. It may swell up and block your throat. Do not take Citrucel if you have difficulty swallowing. If you experience chest pain, vomiting, or difficulty swallowing or breathing after taking Citrucel, seek immediate medical attention.
- Difficulty swallowing.
- Allergy to Citrucel or any ingredients in the formulation.
Citrucel, when used appropriately, should generally produce a bowel movement in 12-72 hours.
When Citrucel is taken with other prescription drugs, over-the-counter medications, vitamins, and supplements, it may change how they work or increase the frequency or severity of side effects. Make sure that you tell your healthcare professional about anything that you are taking to avoid any negative drug interactions, including:
- Other laxatives like Metamucil (psyllium).
- Lactulose.
- Pyridostigmine.
Citrucel (methylcellulose) is available as 500 mg caplets and 2 g/scoop fiber powder for oral solution.
Citrucel products also contain calcium. For a full list of inactive ingredients, see the manufacturer’s website.
Store Citrucel at room temperature. Keep out of reach of children and pets.
Haleon manufactures Citrucel.
Yes, there are generic versions of Citrucel (methylcellulose).
There are no withdrawal effects associated with Citrucel; however, your constipation symptoms may return if the cause was not addressed. It is always best to consult your healthcare provider before stopping any medication.
When Citrucel is used appropriately, it is likely safe in pregnancy. Talk to your doctor if you are already pregnant or if you have any plans to become pregnant. They will know or recommend what is best for you.
When Citrucel is used appropriately, it is likely safe in breastfeeding. Talk to your doctor if you are already breastfeeding or if you have any plans to breastfeed. They will know or recommend what is best for you.
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Click to joinImportant information about buying Citrucel from UniversalDrugstore™
Once you complete your order, we process, verify, and dispatch your medication. You’ll receive email updates at each stage, including tracking details once your order ships. If any additional documentation is needed (such as a valid prescription), we’ll contact you promptly. Once approved, your order is charged and delivered directly to your doorstep.
Orders are typically processed within 1–3 business days once all required documents are received and approved. Standard delivery times range from 10–18 business days, depending on your location.
Yes! Once your medication ships, you will receive an email with tracking information so you can monitor your shipment every step of the way.
Our Customer Care team is available 24/7 to assist with any order-related concerns or questions. If you experience delays, missing items, or need support, contact us using the details provided in your confirmation email.
All orders are shipped in discreet, plain packaging to protect your privacy. Medications are securely packaged to prevent damage and ensure they arrive in top condition.
Yes. We use cold-chain shipping methods to safely transport temperature-sensitive medications, ensuring they maintain proper storage conditions throughout delivery.
Shipping costs vary depending on your location and shipping method. Free shipping promotions may be available—check the checkout page for the latest offers. Orders above $100 going to a US destination will receive free shipping.
Currently, we do not bill Medicare or Medicaid directly. However, we provide detailed receipts and documentation that you can submit to your insurance provider for potential reimbursement.
Universal Drugstore does not bill private health insurance directly, but we provide a detailed invoice that you can submit to your insurer for possible reimbursement. Many insurers will accept Universal Drugstore’s documents, but if you have any questions, check with your insurance company prior to purchasing.
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Universal Drugstore offers many generic alternatives that provide the same active ingredients at a lower cost. Search for your medication and compare pricing for generic vs. brand-name options. Generic availability depends on the medication.
If your medication requires a prescription, you must upload it online, via email, or fax. Over-the-counter (OTC) medications do not require a prescription. All prescription medication purchases require a valid and approved prescription. The Universal Drugstore customer care team can contact your doctor directly to get your prescription, and ensure all information is up to date.
Yes! You can add multiple medications to your cart, including prescription, OTC, and pet medications, and complete your purchase in a single checkout process.
Yes! If your prescription includes refills, you can reorder quickly by logging into your account and selecting your medication for a hassle-free refill process. Always refill your medication proactively and ontime, to ensure you do not run out of important medication.
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- Up to 80% savings on medications
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The information, including but not limited to, text, graphics, images and other material contained on this website are for informational purposes to increase health awareness only. No material on this site is intended to be a substitute for professional medical advice, diagnosis or treatment.
Always seek the advice of your physician or other qualified health care provider with any questions you may have regarding a medical condition or treatment and before undertaking a new health care regimen, and never disregard professional medical advice or delay in seeking it because of something you have read on this website.

Jamie Winn, PharmD, is a licensed pharmacist and seasoned medical content reviewer with over 20 years of experience in clinical pharmacy, patient care, and healthcare leadership.
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Shirley is a Medical Writer and first-year Doctor of Pharmacy (PharmD) student at the University of Alberta, where she is building on her strong foundation in health sciences and patient care.
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