Fertility, Pregnancy and Contraception — on Pazopanib

Your oncology team or GP will advise you on the most appropriate method for your situation. The prescribing guidance calls for highly effective contraception — methods with very low failure rates when used correctly, such as an intrauterine device, a hormonal implant, or a combination of two methods. Condoms alone are generally not considered sufficient as a single method. Ask your team to review your current contraception before treatment starts so there is no gap in cover.

Contact your oncology team the same day — do not wait for a scheduled appointment. Do not stop pazopanib on your own without speaking to your team first, because stopping abruptly has its own clinical implications. Your oncologist will arrange urgent referral to a specialist centre experienced in managing cancer during pregnancy. The risk to the pregnancy is real, and decisions need to be made jointly by your oncologist and an obstetrician together, not separately.

Yes. The pazopanib prescribing information requires male patients whose partners can become pregnant to use effective contraception throughout treatment and for two weeks after the last dose. Whether pazopanib passes into semen in quantities that could harm a pregnancy is not fully established, but the precaution is standard and should be followed. Discuss the most appropriate contraceptive method with your partner's oncology team before treatment begins.

Pazopanib has shown effects on reproductive function in animal studies, and there is a possibility it may reduce fertility in humans. Whether any effect is temporary or long-lasting after treatment ends is not established, because long-term fertility data from trials is limited. This uncertainty is precisely why the most important conversation to have is before you start treatment, when options such as egg or sperm banking are still available. Do not wait until after your first cycle to raise this.

Yes, and this is worth raising at your first appointment if you want to keep the possibility of children open. Egg freezing and sperm banking are established procedures. They are generally more straightforward to arrange before targeted therapy begins, because treatment can affect egg and sperm quality. Your oncologist can refer you to a fertility preservation service. Treatment timelines are sometimes tight, so mention this early so the referral can happen without delaying your cancer treatment.

The prescribing information advises against breastfeeding during treatment and for at least two weeks after the last dose, covering the time the drug takes to clear from the body. After that period, pazopanib itself is no longer the constraint — but whether breastfeeding is appropriate will also depend on whether you are starting a new treatment, which may carry its own requirements. Confirm with your oncologist before resuming or beginning breastfeeding, rather than assuming the two-week mark is the only consideration.