Updated: January 25, 2026

What Is CellCept? Uses, Dosage, and What You Need to Know in 2026

Author

Peter Daggett

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What Is CellCept?
What Is CellCept Used For?
What Does CellCept Look Like?
How Is CellCept Dosed?
How Long Do You Take CellCept?
What Else Do You Need to Know?

CellCept (mycophenolate mofetil) is used to prevent organ rejection after transplant. Here's a plain-English guide to what it is, how it's dosed, and what patients need to know.

If you or a loved one just received an organ transplant — or if a specialist has recommended CellCept for an autoimmune condition — you probably have a lot of questions. What is this medication? Why do I need it? How does it work? This guide provides a clear, patient-friendly overview of CellCept in 2026.

What Is CellCept?

CellCept is the brand name for mycophenolate mofetil (MMF), an immunosuppressant medication manufactured by Genentech (a Roche company). It belongs to a drug class called selective immunosuppressants, and it works by reducing the activity of your immune system.

It's available as a generic (mycophenolate mofetil) from multiple manufacturers. A related but different formulation called Myfortic (mycophenolate sodium delayed-release) delivers the same active drug but in a different salt form with a different release profile.

What Is CellCept Used For?

CellCept's FDA-approved uses are:

Kidney transplant: To prevent the body from rejecting a newly transplanted kidney. Approved for adults and children age 3 months and older.

Heart transplant: To prevent rejection after a heart transplant, used in combination with cyclosporine and corticosteroids.

Liver transplant: Prevents organ rejection after liver transplantation.

Graft-versus-host disease (GVHD) prevention: FDA approved in 2021 to help prevent GVHD in hematopoietic stem cell (bone marrow) transplantation.

CellCept is also widely used off-label for autoimmune diseases where the immune system needs to be suppressed, including:

Lupus nephritis (kidney inflammation due to lupus)

Vasculitis (blood vessel inflammation)

Myasthenia gravis

Autoimmune hepatitis

IgA nephropathy and other kidney diseases

What Does CellCept Look Like?

Brand CellCept comes in the following forms:

250 mg blue-brown capsules: Printed with "CellCept 250" on the blue cap and "Roche" on the brown body.

500 mg lavender film-coated tablets: Printed with "CellCept 500" on one side and "Roche" on the other.

200 mg/mL oral suspension: A liquid form used primarily for pediatric patients or adults who cannot swallow capsules/tablets.

500 mg/vial IV powder: For hospital use when oral administration is not possible (e.g., immediate post-transplant period).

How Is CellCept Dosed?

The dose of CellCept depends on the type of transplant:

Kidney transplant: 1 gram (two 500 mg tablets) twice daily — totaling 2 grams per day.

Heart transplant: 1.5 grams (three 500 mg tablets) twice daily — totaling 3 grams per day.

Liver transplant: 1.5 grams twice daily orally, or 1 gram twice daily IV when oral is not possible.

Doses should be taken approximately 12 hours apart, on an empty stomach (1 hour before or 2 hours after eating) unless otherwise directed by your doctor. Do not crush tablets or open capsules — if you cannot swallow them, ask your transplant team about the oral suspension.

How Long Do You Take CellCept?

For transplant recipients, CellCept is typically a lifelong medication. The body never stops being capable of rejecting the transplanted organ — immunosuppression maintains the fragile truce between your immune system and the donor organ. Stopping CellCept abruptly — even years post-transplant — can trigger rejection.

For autoimmune conditions, the duration varies by disease and patient response. Some patients are on CellCept long-term, while others may taper off once the disease is in remission.

What Else Do You Need to Know?

CellCept is NOT a controlled substance and does not have abuse potential.

Do not donate blood while taking CellCept (or for 6 weeks after stopping) or donate sperm (or for 90 days after stopping).

Limit sun exposure and use sunscreen SPF 30+ — CellCept increases skin cancer risk.

Avoid live vaccines while taking CellCept. Update vaccinations before starting if possible.

For a complete review of CellCept's side effects and warning signs, see: CellCept Side Effects: What to Expect and When to Call Your Doctor.

Frequently Asked Questions

CellCept (mycophenolate mofetil) is FDA-approved to prevent organ rejection in patients who have received a kidney, heart, or liver transplant, and to prevent graft-versus-host disease after bone marrow transplantation. It is also widely used off-label for autoimmune diseases including lupus nephritis, vasculitis, myasthenia gravis, and autoimmune hepatitis.

CellCept is the brand name — mycophenolate mofetil is the generic name for the same drug. Multiple FDA-approved generics are available and are considered bioequivalent to brand CellCept. Note: Myfortic (mycophenolate sodium) is a different salt form of the same active drug and is NOT directly interchangeable with CellCept without a dose adjustment.

Alcohol is not specifically contraindicated with CellCept, but alcohol can stress the liver and immune system, and may worsen GI side effects like nausea and stomach upset. Given that transplant patients are already on multiple medications with metabolic demands, it is generally advisable to discuss alcohol use with your transplant team.

For most transplant recipients, CellCept is a lifelong medication. The immune system retains the ability to reject the transplanted organ for as long as you have the organ — even decades after the transplant. Stopping immunosuppression without medical supervision can lead to acute or chronic rejection. Your transplant team will advise on any dose adjustments over time.

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