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Drug interactions

Mycophenolate mofetil + Tocilizumab

Severity: Major

Mycophenolate mofetil and Tocilizumab: major interaction.

Last updated

For healthcare professionals — reference only. This page is a brief summary, not medical advice and not a substitute for official labeling or clinical judgement. Always verify before prescribing or dispensing.

Summary

Tocilizumab blocks interleukin-6 signalling and, with mycophenolate, increases the risk of serious infections. Tocilizumab can also mask fever and inflammatory markers such as CRP, delaying recognition of infection.

What this interaction means in plain words

Mycophenolate mofetil and Tocilizumab can interact in a way that may be serious. Using them together is sometimes necessary, but it needs a deliberate decision by the prescriber, a plan for monitoring, and clear advice on the warning signs to watch for.

Mycophenolate mofetil belongs to Miscellaneous; Tocilizumab belongs to Musculoskeletal.

Evidence level: Moderate

Why it happens

Additive immunosuppression through IL-6 receptor blockade and inhibition of lymphocyte proliferation.

What to do

Screen for latent TB before starting, monitor neutrophil count, platelets and liver enzymes, and maintain a low threshold to investigate infection even without fever.

What to ask your pharmacist

  • Does the benefit of taking both outweigh the risk in my case?
  • Do I need any blood test, ECG or other check while on both?
  • What early warning signs should I watch for, and what should I do if they appear?

Bring a full list of your medicines, including over-the-counter products, supplements and herbal remedies, to every pharmacy visit.

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Frequently asked questions

Can I take Mycophenolate mofetil with Tocilizumab?

MediHelp rates the interaction as major. Mycophenolate mofetil and Tocilizumab can interact in a way that may be serious. Using them together is sometimes necessary, but it needs a deliberate decision by the prescriber, a plan for monitoring, and clear advice on the warning signs to watch for. Tocilizumab blocks interleukin-6 signalling and, with mycophenolate, increases the risk of serious infections. Tocilizumab can also mask fever and inflammatory markers such as CRP, delaying recognition of infection.

How serious is the interaction between Mycophenolate mofetil and Tocilizumab?

MediHelp rates it major, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Screen for latent TB before starting, monitor neutrophil count, platelets and liver enzymes, and maintain a low threshold to investigate infection even without fever.

What other medicines interact with Mycophenolate mofetil?

MediHelp also lists interactions of Mycophenolate mofetil with, for example, Adenovirus types 4 and 7 live, Bcg vaccine live, Influenza virus vaccine quadrivalent intranasal. The full list is on the Mycophenolate mofetil page.

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