Levonorgestrel Leon Farma (Levonorgestrel)

Levonorgestrel acts within the hormonal contraceptive pathway to prevent unintended pregnancy.

• Emergency contraception: provides post‑coital prevention of pregnancy when taken within the recommended time frame.
• Contraception: used as a progestin‑only method to inhibit ovulation and fertilization in women of reproductive age.
• Hormonal birth control: incorporated into regimens for ongoing prevention of pregnancy under medical supervision.

• Levonorgestrel is a synthetic progestogen that binds to progesterone receptors in the hypothalamus and pituitary, suppressing the luteinizing hormone surge and thereby inhibiting ovulation. It also induces changes in cervical mucus, making it less permeable to sperm, and alters the endometrial lining to reduce the likelihood of implantation.

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

Common Side Effects

• Nausea: mild to moderate upset stomach.
• Headache: occasional tension‑type headache.
• Breast tenderness: temporary discomfort.
• Menstrual changes: spotting or altered flow.
• Abdominal pain: cramping or discomfort.
• Fatigue: feeling unusually tired.

Serious or Rare Side Effects

• Thromboembolic events: deep‑vein thrombosis or pulmonary embolism.
• Severe allergic reaction: rash, swelling, or anaphylaxis.
• Liver dysfunction: jaundice or elevated enzymes.
• Ectopic pregnancy: if pregnancy occurs despite use.
• Persistent pelvic pain: may indicate serious gynecologic condition.
• Vision changes: rare visual disturbances.

Before using Levonorgestrel, certain precautions should be observed to ensure safety.

• Assess contraindications: review patient history for thromboembolic disorders, hormonal cancers, or severe liver disease.
• Avoid use in pregnancy: the product is not indicated for pregnant women.
• Consider drug interactions: evaluate concurrent use of enzyme‑inducing or inhibiting medications.
• Monitor for adverse reactions: advise patients to report severe abdominal pain, unusual bleeding, or signs of thrombosis.
• Store at ambient temperature: keep below 25°C in the original packaging, protect from moisture.

Levonorgestrel can interact with several medicines, affecting its efficacy or safety.

Major Interactions (Avoid)

• Enzyme inducers (e.g., rifampicin, carbamazepine): may markedly reduce contraceptive effectiveness.
• Antiepileptic drugs that induce CYP3A4: can lower levonorgestrel plasma levels.
• Hormonal therapies for breast cancer: concurrent use may be contraindicated.

Moderate Interactions (Monitor Closely)

• Antifungal azoles (e.g., ketoconazole): may increase levonorgestrel concentrations.
• Protease inhibitors (e.g., ritonavir): can alter drug metabolism.
• St. John’s wort: may decrease effectiveness, requiring additional contraceptive measures.