Mycophenolate (CellCept/Myfortic)
An immunosuppressant medication used for autoimmune conditions, often as a steroid-sparing agent.
Drug Class: Immunosuppressants
Mycophenolate (brand names CellCept, Myfortic) is an immunosuppressant medication commonly used for autoimmune conditions in neuro-ophthalmology. It's generally well-tolerated and effective as a steroid-sparing agent.
Key Takeaways
- Immunosuppressant medication
- Good steroid-sparing agent
- Takes weeks to months for full effect
- GI side effects most common
- Requires birth control-causes birth defects
How It Works
Mycophenolate inhibits an enzyme needed for immune cell (lymphocyte) proliferation. By reducing these cells, it dampens the immune response causing autoimmune disease.
Common Uses
- Myasthenia gravis
- NMO and MOGAD
- Uveitis
- Other autoimmune conditions
Dosing
- Usually 1000-1500mg twice daily
- May start lower and increase
- Take on empty stomach for best absorption
- Myfortic (enteric-coated) may reduce GI side effects
Side Effects
Common
- Nausea, vomiting
- Diarrhea
- Abdominal pain
- Headache
Serious (Monitor For)
- Bone marrow suppression
- Increased infection risk
- GI bleeding
- Progressive multifocal leukoencephalopathy (rare)
Critical Warning
Mycophenolate REMS - pregnancy and contraception
Mycophenolate carries an FDA boxed warning for first-trimester pregnancy loss and major birth defects (especially facial, limb, and heart). It is dispensed under a Risk Evaluation and Mitigation Strategy (REMS) program in the US.
- Women must have a negative pregnancy test within 10 days of starting and repeat testing during treatment
- Use two reliable forms of contraception starting 4 weeks before, throughout treatment, and for at least 6 weeks after the last dose
- Stop mycophenolate at least 6 weeks before trying to conceive and only under your doctor's supervision
- Men on mycophenolate must use condoms with sexual partners who could become pregnant during treatment and for at least 90 days after the last dose
- Do not breastfeed while on mycophenolate
- If you believe you may be pregnant, contact your prescriber the same day - do not stop abruptly without a plan
Monitoring
- Complete blood count regularly
- Liver function tests
- Pregnancy testing before starting and during treatment
- Watch for signs of infection
Tips for Taking Mycophenolate
- Take on empty stomach (1 hour before or 2 hours after meals)
- Don't crush or chew capsules
- Space doses evenly
- Avoid antacids containing aluminum or magnesium
Frequently Asked Questions
Can I take this if I want to become pregnant?
No. You must stop mycophenolate at least 6 weeks before trying to conceive. Discuss family planning with your doctor-alternative medications may be needed.
Why do I have stomach problems?
GI side effects are common with mycophenolate. Taking it with food may reduce GI symptoms but lowers absorption - discuss with your prescriber whether to take it with food or to switch to the enteric-coated form (Myfortic), which may have fewer GI effects without compromising absorption.
How long until it works?
Full effect may take 2-3 months. Your doctor may overlap it with steroids initially.
Medical Disclaimer: This information is for educational purposes only and does not replace professional medical advice.
References
For current U.S. drug labeling, contraindications, boxed warnings, pregnancy/lactation language, and formulation-specific dosing, check the official label databases and your prescriber's instructions.