Monoclonal antibody (targeted cancer therapy)
Last reviewed June 2026
Who is this for?
Trastuzumab hyaluronidase (sold as Herceptin SC) is an injection given under the skin that works by targeting a protein called HER2 found on the surface of certain cancer cells, helping your immune system find and destroy those cancer cells while slowing their growth.
Binds to human epidermal growth factor receptor 2 (HER2) on cancer cell surfaces, blocking HER2-mediated signaling and promoting antibody-dependent cellular cytotoxicity and apoptosis; hyaluronidase enhances subcutaneous tissue permeability for improved drug delivery.
Prescription Required
You need a doctor's prescription to buy this drug.
Explore this drug
This is NOT a tablet — it is an injection given under the skin (subcutaneous) by a trained healthcare worker in a hospital or cancer treatment centre. The usual dose is a fixed 600 mg injection given once every 3 weeks. You cannot take this at home on your own. Your oncologist will determine how many cycles you need based on your cancer stage.
If you miss your scheduled injection appointment, contact your cancer doctor or treatment centre as soon as possible to reschedule. Do not try to double up on doses. Your doctor will adjust your treatment schedule accordingly.
Only receive this drug at a recognised cancer treatment centre with qualified oncologists — never buy from unverified sources or roadside sellers. Your doctor should check your heart function regularly with tests before and during treatment. If you notice unusual breathlessness, persistent cough, or swollen ankles, report to your doctor immediately — do not wait for your next appointment.
Anthracycline chemotherapy drugs (like doxorubicin) — taking them together significantly increases the risk of heart damage. Other cancer drugs like paclitaxel or docetaxel may increase side effects when used in combination. Always tell your oncologist about every medicine, herb or supplement you are taking.
Check your specific combination
Is it safe to take Trastuzumab with your other drugs?
This drug is NOT safe during pregnancy — it can cause serious harm or death to an unborn baby, and women must use effective contraception during treatment and for at least 7 months after the last dose; breastfeeding should also be avoided.
This medicine must be stored in a refrigerator between 2°C and 8°C — it must NOT be left in room temperature or exposed to Nigerian heat or sunlight, as it will spoil. Do not freeze it. It is stored and handled by the hospital or pharmacy, so you normally will not need to store it yourself. Keep away from children.
For information only — not medical advice. Always talk to a doctor or pharmacist before changing your medication.
Names this drug is sold under — especially in Nigerian and West African pharmacies
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Counterfeit Drug Warning
Fake drugs are a serious problem in Nigeria. Always buy from a registered pharmacy. If the packaging looks different from what is described above, do not use it.