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Does Ravulizumab Interact with Crovalimab?

CDI records a major classification for Ravulizumab and Crovalimab. The stored summary is: Formation of dual targeting drug complexes (DTDCs) when switching between crovalimab and ravulizumab can result in Type III hypersensitivity reactions. DTDCs expected to clear in longer timeframe than eculizumab. The mechanism involves crovalimab and ravulizumab bind different epitopes on c5, forming dtdcs that may trigger type iii hypersensitivity reactions. Patients taking both medications should consult their healthcare provider before starting, stopping, or changing the dosage of either drug. This record was extracted from drug labeling through openFDA. NIH/NLM RxNorm is used for drug identities. The summary and severity classification are CDI's processed information, not a verbatim source quotation. Product, route, and patient circumstances matter.

Severity
Major
Ravulizumab Class
Complement Inhibitor
Crovalimab Class
Complement C5 Inhibitor
Management
Close medical supervision required
Data Source
U.S. FDA via OpenFDA

Recorded Mechanism

Crovalimab and ravulizumab bind different epitopes on C5, forming DTDCs that may trigger Type III hypersensitivity reactions

What To Tell Your Doctor or Pharmacist

If you are taking Ravulizumab and your doctor is considering prescribing Crovalimab (or vice versa), make sure to:

  • Inform your doctor and pharmacist of all current medications, including over-the-counter drugs and supplements
  • Ask whether the benefits of combining these medications outweigh the risks for your specific situation
  • Ask what symptoms to watch for that would indicate the interaction is causing problems
  • Ask how frequently you should be monitored while these are co-prescribed
  • Ask whether any dosage adjustments are needed
  • Never stop or change either medication without first consulting your healthcare provider
💊 Ravulizumab(Ultomiris)+💊 Crovalimab(Piasky)

Severity & Interaction Details

⚠️
major
Use with caution — major interaction
Serious risk of clinically significant harm. Generally avoid; if used, monitor closely.
Severity scale
MinorContra
On record
Yes
Drug A class
Complement Inhibitor
Drug B class
Complement C5 Inhibitor
Source
NLP:crovalimab

What this means in plain English

Formation of dual targeting drug complexes (DTDCs) when switching between crovalimab and ravulizumab can result in Type III hypersensitivity reactions. DTDCs expected to clear in longer timeframe than eculizumab.

About Ravulizumab and Crovalimab

Ravulizumab is a Complement Inhibitor, while Crovalimab is a Complement C5 Inhibitor. You may recognize them by the brand names Ultomiris and Piasky. Both Ravulizumab and Crovalimab carry an FDA boxed warning — the agency's most serious safety designation.

Source and Limitations

This record was produced by automated extraction from drug-label information, including AI processing. The summary and mechanism are not verbatim FDA quotations. The drug profiles below may describe different formulations from the source label. Confirm the exact product and route with your pharmacist. This page does not establish independent clinical review.

📖 Source: NLP:crovalimab

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How this information is prepared: CDI uses automated extraction, including AI, to summarize drug labeling from openFDA and includes separately identified curated-reference records. RxNorm helps identify medications; it does not verify interaction claims. Extracted summaries and CDI severity classifications can contain errors and are not verbatim FDA statements or independent clinical review. Maintained by CheckDrugInteractions.com. See our methodology or report a correction at support@checkdruginteractions.com.

Data sourced from U.S. FDA drug labeling via openFDA and the NIH National Library of Medicine, supplemented with a small number of well-established interactions from curated clinical references. For informational purposes only. Always consult your pharmacist or physician.

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