Medical treatment of endometriosis — Rapid

Synopsis

Select safe, goal-concordant analgesic and hormonal treatment for suspected or confirmed endometriosis, monitor effectiveness and harms, and know when specialist escalation is needed.

Medical treatment aims to reduce pain and functional disruption; it suppresses disease activity while taken but does not remove lesions or guarantee permanent symptom resolution.
NICE supports a short trial of paracetamol or an NSAID, alone or together, for endometriosis-related pain, with contraindications, cumulative exposure and the person's priorities reviewed.
Offer hormonal treatment, such as a combined oral contraceptive or a progestogen, for suspected, confirmed or recurrent endometriosis; laparoscopic confirmation is not required before a therapeutic trial.
Explain that hormonal treatment can reduce pain and has no permanent adverse effect on later fertility, but most suppressive options prevent conception while used and do not improve spontaneous pregnancy rates when someone is actively trying to conceive.
Match the option to bleeding preference, contraceptive need, adherence, migraine, thrombosis risk, bone health, mood, liver disease, breastfeeding and past response rather than ranking every product identically.
NICE recommends relugolix combination therapy and linzagolix with hormonal add-back as options within their licences after previous medical or surgical treatment; these are specialist regimens, not routine first prescriptions.
GnRH agonists and antagonists reduce ovarian hormone signalling and can cause vasomotor symptoms and bone loss; add-back therapy, contraindication screening and bone-density monitoring are regimen-specific safety requirements.
Review each trial at an agreed interval for pain domains, bleeding, function, adverse effects and adherence; refer when treatment is ineffective, not tolerated, contraindicated or when endometrioma, deep disease, organ risk or fertility complexity is present.

Key red flags

A positive pregnancy test with pelvic pain or bleeding requires ectopic-pregnancy assessment; hormonal suppression must not be used as a substitute for locating the pregnancy.

Acute unilateral pain with vomiting or a known endometrioma raises torsion or cyst rupture and needs urgent gynaecology review even during established medical treatment.

Visible haematuria, flank pain, hydronephrosis or impaired renal function suggests urinary-tract involvement and needs specialist organ-protective assessment.

New focal neurological symptoms, severe depression, suicidal thinking or major deterioration temporally related to a medicine requires prompt safety review and appropriate escalation.

Chest pain, breathlessness, unilateral leg swelling or a new focal neurological deficit while taking oestrogen-containing treatment may represent thrombosis and requires emergency assessment.

Investigation priorities

Pregnancy assessmentFirst step

Exclude pregnancy before starting hormonal suppression or a GnRH regimen and investigate pregnancy-related pain promptly.

Management branches

Initial symptom treatmentStart a goal-matched therapeutic trial

Endometriosis is suspected or confirmed and acute complications have been excluded.

Discuss a short paracetamol or NSAID trial and offer combined hormonal contraception or a progestogen according to preference, fertility plans and medical eligibility.
Explain the expected bleeding pattern, contraceptive status, common adverse effects, off-label status where relevant and the time and outcome used to judge benefit.
Arrange ultrasound, referral or organ-specific investigation in parallel when indicated; symptom treatment must not become a barrier to diagnosis.

Key medicines

IbuprofenTake 400 mg orally up to three times daily, at least 4 hours apart and preferably with or after food, using the lowest effective dose for the shortest necessary time.Avoid with previous NSAID hypersensitivity, active ulcer or bleeding, severe renal, hepatic or heart failure. In pregnancy, avoid systemic NSAIDs from 20 weeks unless clinically required; if needed, use the lowest dose for the shortest time and consider antenatal monitoring after exposure for several days. They are contraindicated from 28 weeks. Review asthma, anticoagulants, cardiovascular risk, cumulative over-the-counter use and use while trying to conceive.

Dienogest 2 mgTake 2 mg orally once daily at about the same time without a tablet-free interval; begin the next pack immediately and continue regardless of vaginal bleeding.Exclude pregnancy and stop hormonal contraception before initiation; dienogest is not a contraceptive, so use a non-hormonal method if needed. Review unexplained bleeding, active thrombosis, severe liver disease, hormone-dependent malignancy, mood change and bone risks.

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