Breast Cancer Home > Herceptin Dosage

Your dosage of Herceptin will depend on your weight, the progression of your cancer, and other factors. The dose is administered at your healthcare provider's office, a hospital, or an infusion center either once a week or once every three weeks, depending on your dosing schedule.

Herceptin Dosage: An Introduction

The dose of Herceptin® (trastuzumab) that your healthcare provider recommends will vary depending on a number of factors, including:
As is always the case, do not adjust your Herceptin dosage unless your healthcare provider specifically instructs you to do so.

Dosage of Herceptin for Breast or Stomach Cancer

There are several different dosing regimens for Herceptin, based on the severity of your cancer and the other treatments you have tried or are currently taking. Your healthcare provider will carefully choose an appropriate dosage based on these factors.
Because the dosage is calculated using your weight, it is important for your healthcare providers to have an accurate weight on record for you. If your weight changes significantly (and your healthcare provider has not recently weighed you), be sure to mention this to your healthcare provider.

General Dosing Information

Considerations for people taking Herceptin include the following:
  • Herceptin is given intravenously (by IV) once a week or every three weeks, depending on the dosing regimen.
  • Your first Herceptin infusion will last 90 minutes, and subsequent infusions may be shorter, depending on the particular dosing regimen.
  • Most people receive their Herceptin infusion at their healthcare provider's office, a hospital, or at an "infusion center."
  • For the medication to work properly, it must be taken as prescribed. Herceptin will not work as well if you stop taking it before your healthcare provider recommends.
  • If you are unsure about anything related to Herceptin or your Herceptin dosage, talk to your doctor, nurse, or pharmacist.
Written by/reviewed by:
Last reviewed by: Kristi Monson, PharmD;
Last updated/reviewed:
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