GnRH Analogue Therapy

GnRH analogue therapy temporarily lowers ovarian hormone activity to reduce symptoms and shrink hormone-sensitive tissue.

GnRH analogue therapy uses medicine that changes the signals between the brain and ovaries. This lowers ovarian hormone activity for a planned period, creating a temporary medical-menopause effect. It may ease hormone-sensitive symptoms and reduce the activity or size of tissue affected by hormones. The medicine may be given as an injection or another formulation, depending on the product and your treatment plan.

Treatment is usually reviewed at planned appointments. Your clinician will explain the intended benefit, how long treatment is expected to continue, and whether add-back hormones or another measure is appropriate for you.

The timing varies by the condition being treated, the medicine used and your symptoms. Hormone-related bleeding or pelvic pain may improve as ovarian activity is suppressed, but the change is not always immediate. Keep a simple record of pain, bleeding and other symptoms so your clinician can judge the response rather than relying on one difficult day.

Lower oestrogen can cause hot flushes, night sweats, vaginal dryness, reduced sexual desire, mood changes, headaches or sleep disruption. Some people notice injection-site discomfort. Tell your clinician about troublesome symptoms, especially low mood, new severe headaches or unexpected bleeding, because the plan may need review.

The course depends on why it was prescribed, your response and whether it is being used before another treatment. It is commonly planned as a limited course because prolonged low-oestrogen treatment can affect bone health and wellbeing. Do not extend, repeat or stop injections without discussing the timing with your prescriber.

The treatment suppresses ovarian hormone signals; it does not remove the underlying cause of every pelvic condition. Periods may become lighter or stop during treatment, and fertility usually returns after treatment ends, although the timing differs between people. A pregnancy plan should be discussed before starting.

A gynaecologist may consider this therapy for selected people with [Endometriosis](/conditions/endometriosis/) or an [Ovarian Endometrioma](/conditions/ovarian-endometrioma/), particularly when symptom control or treatment before a procedure is being considered. Your medical history, bone health, migraine history, mood, fertility goals and other medicines all affect the choice.

Before the first dose, the clinician confirms the reason for treatment, checks relevant health factors and explains contraception or pregnancy considerations. The medicine is then administered according to its product instructions. Follow-up checks focus on symptoms, bleeding, mood and other effects. Contact the clinic if a dose is delayed or a new medicine is prescribed.

Most people can return to usual activities unless their clinician advises otherwise. Injection soreness can be managed with the advice provided by the clinic. Symptoms related to low oestrogen may continue while treatment is active and settle after ovarian activity resumes. Keep follow-up appointments even if symptoms improve.

Discuss bone health, mood symptoms, cardiovascular history and any unexplained vaginal bleeding before treatment. Seek prompt medical advice for severe or persistent symptoms, marked mood deterioration, or a suspected allergic reaction. Urgent care is appropriate for trouble breathing, facial swelling or sudden severe pain.

Depending on the diagnosis and your goals, alternatives may include pain medicines, other hormonal treatment, surgery or observation. A [GnRH Agonist](/materials/gnrh-agonist/) is one medicine category your clinician may discuss. The right option depends on symptom pattern, fertility plans, previous treatment and examination findings.

A gynaecologist can confirm whether GnRH analogue therapy fits your diagnosis and arrange monitoring. Bring a list of medicines, allergies, previous scans or procedures, and your goals for pain control or pregnancy. Mention any [Pelvic Pain](/symptoms/pelvic-pain/) pattern, bleeding changes or mood concerns.