GnRH agonist drugs list: what to know

GnRH agonist drugs are hormone medicines that initially stimulate, then reduce, signals that tell the body to make sex hormones. Examples used in oncology include leuprolide, goserelin, and triptorelin. The exact medicine, formulation, and schedule depend on the cancer, treatment goal, and your medical history.

These medicines act on the pituitary gland, which helps control the ovaries or testes. After an initial hormonal surge, ongoing treatment can switch down the signals that support testosterone or oestrogen production. This hormone suppression may be used for hormone-sensitive cancers, including some prostate and breast cancers, as part of a wider treatment plan.

They may be given as an injection under the skin or into muscle, with a product-specific schedule. A temporary flare of hormone-related symptoms can occur near the start of treatment, so the oncology team may plan additional protection or monitoring. GnRH agonists are different from GnRH antagonists, even though both can reduce sex-hormone stimulation.

Give your team a complete list of medicines, supplements, allergies, prior hormone treatment, and conditions affecting your bones or heart. Keep injection appointments in the schedule provided; do not change or stop treatment without speaking with the prescriber. Ask how symptoms will be monitored and whether bone-health checks, symptom medicines, or other hormone treatment are appropriate.

Hot flushes, sweating, reduced sexual interest, erectile or menstrual changes, mood changes, tiredness, and changes in bone strength can occur with hormone suppression. Tell the team if these affect sleep, work, relationships, or daily activities. They can explain which symptoms are expected and what support is available.

Contact your oncology team promptly for new or worsening bone pain, difficulty passing urine, marked weakness, fainting, severe mood changes, or symptoms that begin soon after an injection. Seek urgent medical help for chest pain, severe breathlessness, sudden confusion, one-sided weakness, or a serious allergic reaction such as swelling of the face or trouble breathing. Your cancer team can give advice tailored to the specific GnRH agonist and your treatment plan.

Which GnRH agonist am I receiving, and what is its purpose in my treatment? When should hormone changes and possible initial flare symptoms be expected? How will you monitor bone, heart, mood, and sexual health? What should I do if an appointment is delayed or a side effect becomes difficult to manage?