Ethinylestradiol with norgestimate
Brand names: Cilique, Lizinna
A combined oral contraceptive of ethinylestradiol with norgestimate, a progestogen also used for moderate acne in women seeking contraception.
Adult dose
Dose auto-extracted from UK Summary of Product Characteristics (SPC) via the eMC — not yet clinician-verified. Always confirm against the product SmPC and your local formulary before prescribing.
Contraindications
- Presence or risk of venous thromboembolism — current VTE (on anticoagulants) or history of DVT/PE; known hereditary or acquired predisposition (APC-resistance including Factor V Leiden, antithrombin-III deficiency, protein C deficiency, protein S deficiency); major surgery with prolonged immobilisation; high risk of VTE due to multiple risk factors
- Presence or risk of arterial thromboembolism — current or previous ATE (e.g. myocardial infarction) or prodromal condition (e.g. angina pectoris); cerebrovascular disease (current or previous stroke, or TIA); known hereditary or acquired predisposition (hyperhomocysteinaemia, antiphospholipid antibodies); history of migraine with focal neurological symptoms
- High risk of arterial thromboembolism due to multiple risk factors or one serious risk factor such as diabetes mellitus with vascular symptoms, severe hypertension or severe dyslipoproteinaemia
- Acute or chronic liver disease, including hepatitis (viral or non-viral) or severe cirrhosis, or a history of these conditions until at least 3 months after abnormal liver function tests have returned to normal; hepatic adenomas or carcinomas
- Known or suspected sex-steroid influenced malignancies (e.g. of the genital organs or the breast)
- Undiagnosed vaginal bleeding
- Hypersensitivity to the active substances or to any of the excipients
- Concomitant use with medicinal products containing ombitasvir/paritaprevir/ritonavir and dasabuvir, or medicinal products containing glecaprevir/pibrentasvir
Side effects
- Headache (27.9% in pooled clinical trials — the most commonly reported ADR)
- Vaginal infection (7.5%), genital discharge (6.0%)
- Breast pain (5.7%)
- By-cycle reactions, highest in cycle 1: dysmenorrhoea 40.4%, nausea 29.1%, metrorrhagia 26.3%, gastrointestinal disorder (reported as nausea or vomiting) 24.6%, abnormal withdrawal bleeding 16.9%, vomiting 7.0%; amenorrhoea also reported
- Diarrhoea (11.8%) and back pain (5.4%) — most commonly reported reactions identified during post-marketing experience with norgestimate and ethinyl estradiol tablets
- Increased risk of arterial and venous thrombotic and thromboembolic events, including myocardial infarction, stroke, transient ischaemic attacks, venous thrombosis and pulmonary embolism
Interactions
- Medicinal products containing ombitasvir/paritaprevir/ritonavir and dasabuvir, or glecaprevir/pibrentasvir — concomitant use is contraindicated (stated in SPC §4.3 cross-referring to §4.4 and §4.5; the full §4.5 interaction section was not captured in this bundle — clinician to review it)
Clinical monograph
How it works
It suppresses ovulation via the hypothalamic-pituitary axis and thickens cervical mucus and alters the endometrium; norgestimate has relatively low androgenic activity, contributing to its benefit in acne.
Prescribing in practice
- Norgestimate-containing pills carry one of the lower VTE risks among combined contraceptives and are an acceptable first-line option, but UKMEC contraindications still apply.
- Screen for migraine with aura, cardiovascular risk factors and thrombosis history before prescribing.
- Advise on missed-pill rules and reduced efficacy with enzyme inducers or significant vomiting or diarrhoea.
Monitoring
Check blood pressure and reassess cardiovascular and VTE risk at initiation and at periodic review.
Counselling the patient
- Take at the same time each day and follow missed-pill advice.
- Any improvement in acne may take a few cycles to appear.
- Seek urgent help for leg swelling, chest pain, breathlessness or sudden severe headache.
Evidence & guidelines
MHRA and UKMEC place norgestimate-containing combined pills among the lower VTE-risk options suitable for first-line use.
Reference: FSRH CHC guideline; UKMEC; Drug verified in RxNorm (NLM); confirm dosing against the manufacturer SPC (eMC). Verify against your local formulary and current prescribing references before prescribing. The structured dose values shown have been reviewed by a clinician. Monograph status: clinician-reviewed (2026-07-04).
Related
Curated clinical cross-links plus same-class fallbacks.
- Spinal Anaesthesia Hypotension Management · AAGBI; ASA
- Pre-Eclampsia / Eclampsia in ED · NICE NG133; RCOG Green-top 10A
- Suspected Ectopic Pregnancy · NICE NG126; RCOG Green-top 21
- Polycystic Ovary Syndrome (PCOS) · International PCOS Guideline 2023; NICE CKS
- Pre-eclampsia Management · NICE NG133 2019
- Ectopic Pregnancy · NICE CG154 / RCOG GTG 21