Drug interactions
Hydroxycarbamide + Varicella virus vaccine live
Severity: Major
Hydroxycarbamide and Varicella virus vaccine live: major interaction.
Last updated Sources: Health Canada product monograph
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
Hydroxyurea can blunt the response to live varicella vaccine. In immunocompromised patients the vaccine virus may also disseminate and cause serious varicella-like disease.
What this interaction means in plain words
Hydroxycarbamide and Varicella virus vaccine live 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.
Why it happens
Drug-related immunosuppression lowers vaccine immunogenicity and permits replication of the live attenuated virus.
What to do
Avoid live varicella vaccination during hydroxyurea therapy. Vaccinate before starting treatment when possible, or defer it according to the specialist's assessment of immune status.
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?
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References
Other interactions of Hydroxycarbamide
- Didanosine + Hydroxycarbamide Contraindicated
- Hydroxycarbamide + Stavudine Contraindicated
- Adenovirus types 4 and 7 live + Hydroxycarbamide Major
- Axicabtagene ciloleucel + Hydroxycarbamide Major
- Bcg intravesical live + Hydroxycarbamide Major
- Bcg vaccine live + Hydroxycarbamide Major
Frequently asked questions
Can I take Hydroxycarbamide with Varicella virus vaccine live?
MediHelp rates the interaction as major. Hydroxycarbamide and Varicella virus vaccine live 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. Hydroxyurea can blunt the response to live varicella vaccine. In immunocompromised patients the vaccine virus may also disseminate and cause serious varicella-like disease.
How serious is the interaction between Hydroxycarbamide and Varicella virus vaccine live?
MediHelp rates it major, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Avoid live varicella vaccination during hydroxyurea therapy. Vaccinate before starting treatment when possible, or defer it according to the specialist's assessment of immune status.
What other medicines interact with Hydroxycarbamide?
MediHelp also lists interactions of Hydroxycarbamide with, for example, Didanosine, Stavudine, Adenovirus types 4 and 7 live. The full list is on the Hydroxycarbamide page.
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