Natalizumab and Ocrelizumab: Drug Interaction Guide
Quick answer: This is a major interaction — avoid combining Natalizumab and Ocrelizumab unless specifically directed by your doctor.
How Natalizumab interacts with Ocrelizumab
Both agents suppress immune function through different pathways, increasing risk of serious infections including progressive multifocal leukoencephalopathy. Overlapping biologic immunosuppression increases cumulative risk.
What you should do
Avoid concurrent use. Use specialist-directed washout and risk assessment when switching disease-modifying therapy.
Key facts
Severity
Major — avoid combination
Mechanism
Both agents suppress immune function through different pathways, increasing risk of serious infections including progres...
Action
Avoid concurrent use. Use specialist-directed washout and risk assessment when switching disease-modifying therapy.
Frequently asked questions
Can I take Natalizumab and Ocrelizumab together?
No — this combination should generally be avoided. Avoid concurrent use. Use specialist-directed washout and risk assessment when switching disease-modifying therapy.
What is the severity of this interaction?
The interaction between Natalizumab and Ocrelizumab is classified as Major — avoid combination. Both agents suppress immune function through different pathways, increasing risk of serious infections including progressive multifocal leukoencephalopathy. Overlapping biologic immunosuppression increases cumulative risk.
What should I do if I'm prescribed both?
Avoid concurrent use. Use specialist-directed washout and risk assessment when switching disease-modifying therapy. Always consult your prescribing clinician — do not stop or change medications without medical guidance.
Last reviewed: by iMedic Medical Editorial Team. Our editorial process.