Drug interactions
Peginterferon alfa 2b + Tolterodine
Severity: Minor
Peginterferon alfa 2b and Tolterodine: minor 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
Peginterferon alfa-2b may alter CYP2D6 activity, with inconsistent effects reported, so tolterodine exposure could change unpredictably. The clinical significance is uncertain and likely small.
What this interaction means in plain words
Peginterferon alfa 2b and Tolterodine have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised.
Peginterferon alfa 2b belongs to Anti Virals; Tolterodine belongs to Genitourinary.
Why it happens
Interferon may modulate CYP2D6 activity, but the direction and size of the effect are not well established.
What to do
No empirical dose change is needed. Monitor response and anticholinergic adverse effects if therapy is started or stopped.
What to ask your pharmacist
- Is there anything I should notice while taking both?
- Do I need to tell my doctor at the next visit?
Pro+ members
Unlock the full page
Create an account and start a Pro+ trial to unlock the full management advice for Peginterferon alfa 2b and Tolterodine, the additional notes, the evidence detail and the whole-prescription interaction checker.
- Full clinical management advice
- Additional notes
- Evidence detail
- Interaction checker for a whole prescription
Try Pro+ free for 14 days on the web. No card needed.
Other interactions of Tolterodine
Other interactions of Peginterferon alfa 2b
Frequently asked questions
Can I take Peginterferon alfa 2b with Tolterodine?
MediHelp rates the interaction as minor. Peginterferon alfa 2b and Tolterodine have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised. Peginterferon alfa-2b may alter CYP2D6 activity, with inconsistent effects reported, so tolterodine exposure could change unpredictably. The clinical significance is uncertain and likely small.
How serious is the interaction between Peginterferon alfa 2b and Tolterodine?
MediHelp rates it minor, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: No empirical dose change is needed. Monitor response and anticholinergic adverse effects if therapy is started or stopped.
What other medicines interact with Tolterodine?
MediHelp also lists interactions of Tolterodine with, for example, Clarithromycin, Clozapine, Cobicistat. The full list is on the Tolterodine page.
Full monographs, dosing and an interaction checker in the MediHelp app
Open the complete reference, check multi-drug interactions and use dosing tools in the MediHelp app.
