What Are PARP Inhibitor Drugs Used For?

PARP proteins help repair certain types of DNA damage. Blocking these proteins can make it harder for a cancer cell to repair itself. The effect is more useful in some tumours with weakness in another DNA repair pathway, including some cancers linked with BRCA changes.

Doctors may use these medicines after another treatment, for maintenance, or when a cancer has returned, depending on the cancer type, test results and previous treatment. A genetic result can be inherited or limited to tumour cells, so the two types may require different testing.

Take the medicine exactly as prescribed and keep laboratory and clinic appointments. Blood tests may be used to check blood counts, kidney function and liver function. Tell the oncology team about fatigue, nausea, vomiting, diarrhoea, appetite changes or new medicines.

Ask whether your treatment plan depends on a tumour biomarker or an inherited genetic finding. Do not change the dose or stop treatment without advice, even if side effects improve or you feel well.

Contact your oncology team promptly for fever, infection symptoms, unusual bruising or bleeding, marked breathlessness, severe weakness, persistent vomiting or diarrhoea, or reduced urine. These symptoms can need assessment while you are taking a PARP inhibitor.

Ask why this medicine is suitable, which test supports its use, how long treatment is planned, and which blood tests are needed. Ask about contraception or pregnancy, interactions with current medicines, and what symptoms should trigger a same-day call.