How effective is targeted therapy for lung cancer?

Some lung cancers carry changes that help cancer cells grow. A targeted medicine is selected to interfere with a particular change or pathway, so it is not suitable for every tumour. Testing may use tissue from a biopsy or another sample. Effectiveness can be judged by whether scans show shrinkage or stable disease, whether symptoms improve, and whether treatment can be continued safely. Cancer cells can sometimes change over time, which may lead the team to reassess the treatment.

Before treatment, tell your team about all medicines, vitamins and supplements, smoking, lung conditions and previous cancer therapies. Take oral treatment on the schedule provided and ask before changing a dose. Keep notes about cough, breathlessness, diarrhoea, rash, swelling, fever or unusual tiredness. Scheduled reviews allow the team to check scans, blood tests and side effects and decide whether to continue, adjust or change treatment. Never assume a new symptom is unrelated.

Call your care team promptly for worsening breathlessness, a new or persistent cough, fever, chest discomfort, severe diarrhoea, repeated vomiting, or a widespread rash. Seek emergency help for sudden severe breathing difficulty, blue lips, confusion, fainting or chest pain. Lung symptoms may reflect infection, the cancer, or a treatment reaction, so rapid assessment is safer than waiting for the next appointment.

Ask which molecular result supports this medicine, what the first signs of benefit may be, how scans will be timed, which interactions matter, and what to do if you miss a dose or develop breathing symptoms.