trastuzumab · Medicine question

Does anastrozole affect the pharmacokinetics of trastuzumab?

iatroX medicinesPublished 8 November 2026

The answer

Answer

Concomitant anastrozole did not appear to influence the pharmacokinetics of trastuzumab (Herceptin), although no formal drug interaction studies have been performed.

Sources for this answer

Herceptin 150mg Powder for concentrate for solution for infusionRoche Products Limited · emc · SmPC §4.5 Interaction with other medicinal products · Version 52Document updated 5 January 2026

Sources checked 8 November 2026

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