Kliogest (Norethisterone Acetate, Estradiol)

Kliogest is a combined estrogen‑progestogen oral contraceptive that acts on the hypothalamic‑pituitary‑ovarian axis to prevent pregnancy.

• Contraception: provides reliable prevention of pregnancy when taken as directed.
• Menstrual cycle regulation: helps establish a predictable monthly bleeding pattern.
• Dysmenorrhea management: reduces menstrual pain and heavy bleeding associated with the cycle.

• Kliogest combines estradiol, an estrogen that stabilises the endometrium, with norethisterone acetate, a progestogen that suppresses the mid‑cycle luteinising hormone surge. Together they inhibit ovulation, thicken cervical mucus and alter endometrial development, creating multiple barriers to fertilisation and implantation.

Kliogest may cause a range of adverse reactions, most of which are mild and transient.

Common Side Effects

• Nausea: mild stomach upset, often resolves with continued use.
• Headache: tension‑type or migraine‑like pain.
• Breast tenderness: temporary swelling or discomfort.
• Spotting or breakthrough bleeding: irregular light bleeding between periods.
• Mood changes: irritability or mild depressive symptoms.
• Weight fluctuation: slight increase or decrease in body weight.

Serious or Rare Side Effects

• Venous thromboembolism: deep vein thrombosis or pulmonary embolism.
• Hypertension: sudden increase in blood pressure.
• Liver dysfunction: jaundice or abnormal liver enzymes.
• Severe allergic reaction: rash, swelling, or difficulty breathing.
• Visual disturbances: sudden loss of vision or eye pain.
• Cardiovascular events: stroke or myocardial infarction.

Before prescribing Kliogest, clinicians should evaluate individual risk factors and counsel patients on safe use.

• Contraindications: avoid in women with known thromboembolic disorders, active liver disease, or hormone‑dependent cancers.
• Smoking: do not use in patients over 35 who smoke regularly.
• Cardiovascular risk: assess history of hypertension, diabetes, or hyperlipidaemia.
• Medication review: check for drugs that may increase clotting risk.
• Pregnancy testing: confirm non‑pregnant status before initiation.
• Store at ambient temperature: keep below 25°C, retain in original packaging, protect from moisture and direct sunlight.

Kliogest can interact with several medicines that alter hormone metabolism or increase clotting risk.

Major Interactions (Avoid)

• Anticoagulants (e.g., warfarin): may enhance anticoagulant effect and increase bleeding.
• Certain antiretrovirals (e.g., protease inhibitors): can reduce contraceptive efficacy.
• St. John’s wort: induces hepatic enzymes, lowering hormone levels.

Moderate Interactions (Monitor Closely)

• Anticonvulsants (e.g., carbamazepine, phenytoin): may decrease hormone concentrations.
• Antibiotics (e.g., rifampicin): may modestly reduce effectiveness.
• Herbal supplements (e.g., ginseng): could affect hormone metabolism.