Mycophenolate is used off-label as a steroid-sparing treatment for selected autoimmune eye and neurologic conditions. CellCept contains mycophenolate mofetil; Myfortic contains delayed-release mycophenolic acid. These formulations require different prescriptions and should not be exchanged without supervision.

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

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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

Dosing

  • Mycophenolate mofetil (CellCept): eye specialists may use 1,000-1,500 mg twice daily; the FAST uveitis trial used 1,500 mg twice daily
  • Doses usually start lower and are adjusted to tolerance and blood tests
  • Myfortic has a different dose and release pattern; do not substitute it milligram for milligram
  • Follow the formulation-specific instructions about food

Side Effects

Common

  • Nausea, vomiting
  • Diarrhea
  • Abdominal pain
  • Headache

Serious (Monitor For)

  • Bone marrow suppression
  • Increased infection risk
  • Lymphoma and skin-cancer risk with immunosuppression
  • 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.

  • Pregnancy testing is needed immediately before starting and again 8-10 days later, with repeat tests at follow-up
  • Use a label-approved contraception plan throughout treatment and for 6 weeks afterward. Some methods, such as an IUD, can be used alone; other options require two methods. Oral contraceptive pills need an additional method
  • Stop mycophenolate at least 6 weeks before trying to conceive and only under your doctor's supervision
  • Sexually active male patients and/or their partners should use effective contraception during treatment and for at least 90 days afterward
  • 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?

Tell the prescriber about persistent diarrhea, vomiting, or abdominal pain. They may adjust the dose, food instructions, or formulation. CellCept and Myfortic are not interchangeable; do not change products or doses yourself.

How long until it works?

Full effect may take 2-3 months. Your doctor may overlap it with steroids initially.

References