Do you need a referral for HER2-targeted therapy?

Referral requirements differ between facilities, so the oncology service can tell you whether a referral letter is necessary and which records to provide. These medicines require prescribing and monitoring by a clinical team rather than self-booking as a stand-alone treatment.

HER2 is a protein involved in cell growth. A pathology laboratory tests tumour tissue to determine whether HER2 is present at a level or in a pattern that makes targeted treatment relevant. The report and testing method need clinical review; the name of the cancer alone does not show whether this therapy fits.

HER2-targeted medicines work in different ways and may be used alone or with other cancer treatment. The oncologist selects an option according to the tumour findings, treatment setting, medicines already received and health factors that may affect monitoring.

Ask the referring clinic to include your pathology report, HER2 result, scan reports, operation notes and treatment history. If testing was done elsewhere, find out whether the oncology team needs the original slides, tissue block or a laboratory copy of the report.

Bring a complete medicine list and mention heart problems, breathlessness, pregnancy, breastfeeding or plans for pregnancy. Your team may arrange baseline checks and explain how treatment is given, which symptoms to report and how response will be assessed. Do not start, stop or change any cancer medicine without the prescribing team's instructions.

During treatment, contact the oncology team promptly about new shortness of breath, swelling, a racing heartbeat, persistent fever, troublesome diarrhoea, marked weakness or a worsening rash. The appropriate response depends on the medicine and the severity of the symptom.

Call emergency services for severe breathing difficulty, chest pain, fainting, sudden confusion or swelling of the face or throat. These symptoms need immediate assessment rather than waiting for the next treatment visit.

Ask which HER2 test supports the recommendation, whether another pathology review is needed, how the proposed medicine fits with other treatment and what monitoring is planned. You can also ask whom to contact after hours if a new symptom appears.