This site contains promotional information intended only for healthcare professionals resident in the United Kingdom
Menu
Close
Example of description text sitting alongside header
Example of description text sitting alongside header
Menu
Close
Example of description text sitting alongside header
Example of description text sitting alongside header
Menu
Close
Adverse event reporting can be found at the bottom of the page
Menu
Close
For TUKYSA® (tucatinib) Prescribing information click here. For Trazimera® (trastuzumab) Prescribing information click here.
TUKYSA® is indicated in combination with trastuzumab and capecitabine for the treatment of adult patients with HER2-positive locally advanced or MBC who have received at least 2 prior anti-HER2 treatment regimens.1
Combine TUKYSA and capecitabine oral therapies with either intravenous or subcutaneous trastuzumab, allowing choice for treatment at hospital, in clinic or at home
For more information about co-administered trastuzumab and capecitabine, please refer to the respective Summary of Product Characteristics.
TUKYSA should be permanently discontinued in patients unable to tolerate 150 mg orally, twice daily
Please refer to the TUKYSA Summary of Product Characteristics for full information on dose monitoring and guidance on the management of adverse events.
Please refer to the respective Summary of Product Characteristics for trastuzumab and capecitabine for dose modifications for toxicities suspected to be caused by those therapies.
| Adverse Reactions | Severity* | TUKYSA dose modification | |
|---|---|---|---|
| Diarrhoea | Grade 1 and 2 | No dose modification is required† | |
| Grade 3 without anti-diorrhoeal treatment | Initiate or intensify appopriate medical therapy. Interrupt TUKYSA until recovery to ≤Grade 1, then resume TUKYSA at the same dose level | ||
| Grade 3 with anti-diorrhoeal treatment | Initiate or internally appropriate medical therapy. Interrupt TUKYSA until recovery to ≤Grade 1, then result TUKYSA at the next lower dose level | ||
| Grade 4 | Permanantly discontinue TUKYSA | ||
| Increased ALT, AST or total bilirubin | Grade 1 bilirubin (>ULN to 1.5 x ULN) | No dose modification required | |
| Grade 2 Bilirubin (>1.5 to 3 x ULN) | Interrupt TUKYSA until recovery to ≤ Grade 1, then resume TUKYSA at the same dose level | ||
| Grade 3 ALT or AST (>5 to 20 x ULN) OR Grade 3 bilirubin (>3 to 10 x ULN) | Interrupt TUKYSA until recovery to ≤ Grade 1, then resume TUKYSA at the next level dose level | ||
| Grade 4 ALT or AST (>20 x ULN) OR Grade 4 bilirubin (>10 x ULN) | Permanently discontinue TUKYSA | ||
| ALT or AST >3 x ULN AND bilirubin >2 x ULN | Permanently discontinue TUKYSA | ||
| Other adverse reactions | Grade 1 and 2 | No dose modification is required | |
| Grade 3 | Interrupt TUKYSA until recovery to ≤ Grade 1, then resume TUKYSA at the next lower dose level | ||
| Grade 4 | Permanently discontinue TUKYSA |
*Grades based on National Cancer Institute Common Terminology Criteria for Adverse Events Version 4.03.1
†Prompt medical management should also be instituted in the event of persistence of concomitant Grade 2 diarrhoea with concomitant Grade >2 nausea and/or vomiting.1
Please refer to the TUKYSA Summary of Product Characteristics for full information on dose monitoring and guidance on the management of adverse events.
Please refer to the respective Summary of Product Characteristics for trastuzumab and capecitabine for dose modifications for toxicities suspected to be caused by those therapies.
Please refer to the TUKYSA Summary of Product Characteristics
for full information
Tablets shown not actual size
ALT: Alanine Aminotransferase, AST: Aspartate Aminotransferase; MBC: Metastatic Breast Cancer; ULN, upper limit of normal.
References:
Adverse events should be reported. Reporting forms and information can be found at https://yellowcard.mhra.gov.uk or search
for MHRA Yellow Card in Google Play or Apple App Store
Adverse events should also be reported to Pfizer Medical Information on 01304 616161
To access further materials, resources and receive communication about medicines and vaccines promoted by Pfizer.
This site is intended only for healthcare professionals resident in the United Kingdom. If you are a member of the public wishing to access information on a specific medicine, please visit www.medicines.org.uk/emc
This website is brought to you by Pfizer Limited, a company registered in England
and Wales under No. 526209 with its registered office at Ramsgate Road, Sandwich, Kent, CT13 9NJ
Copyright © 2025 Pfizer Limited. All rights reserved.
VAT registration number GB201048427
These pages are not intended for patients or for members of the general public. The healthcare professional web pages contain promotional content.
I confirm that I am a healthcare professional* resident in the United Kingdom.
If you select 'No', you will be redirected to Pfizer.co.uk where you will be able to access reference information on Pfizer's prescription medicines.
*The ABPI Code definition for healthcare professional is members of the medical, dental, pharmacy and nursing professionals and any other persons who in the course of their professional activities may administer, prescribe, purchase, recommend or supply a medicine.
PP-UNP-GBR-7812. January 2024.