Levonorgestrel Xiromed (Levonorgestrel)

• Levonorgestrel is a synthetic progestogen used in hormonal contraception to prevent pregnancy.
• Contraception: Prevents pregnancy when taken as a daily oral tablet.
• Emergency contraception: Can be used within 72 hours after unprotected intercourse to reduce risk of pregnancy.
• Menstrual cycle regulation: May be prescribed to manage irregular menstrual bleeding associated with hormonal imbalance.
• Hormone therapy: Used in combination with estrogen for menopausal hormone therapy to reduce endometrial hyperplasia.
• Intrauterine device (IUD) support: Forms part of levonorgestrel‑releasing IUDs for long‑term contraception.

• Levonorgestrel binds to progesterone receptors in the hypothalamus and pituitary, suppressing the luteinizing hormone surge required for ovulation. It also thickens cervical mucus, creating a barrier to sperm penetration, and alters the endometrial lining, reducing its receptivity to implantation. These combined actions provide effective prevention of fertilization and implantation during the menstrual cycle. The drug’s high affinity for the progesterone receptor ensures sustained progestogenic activity with minimal androgenic effects.

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

Common Side Effects

• Nausea: mild stomach upset often occurring early in treatment.
• Headache: transient headache episodes.
• Breast tenderness: mild discomfort or swelling of the breasts.
• Irregular bleeding: spotting or changes in menstrual flow.

Serious or Rare Side Effects

• Thromboembolic events: rare blood clot formation requiring immediate medical attention.
• Severe allergic reaction: rash, swelling, or difficulty breathing indicating anaphylaxis.
• Liver dysfunction: abnormal liver enzymes or jaundice, though uncommon.

Before prescribing Levonorgestrel Xiromed, clinicians should consider several precautionary measures to ensure safe use.

• Contraindications: avoid in women with known hypersensitivity to levonorgestrel or other progestogens.
• Cardiovascular risk: assess history of thromboembolic disorders before use.
• Liver disease: use with caution in patients with severe hepatic impairment.
• Smoking: advise smokers to quit, as combined hormonal contraceptives increase cardiovascular risk.
• Pregnancy status: confirm the patient is not already pregnant before initiating therapy.
• Store at ambient temperature: keep below 25 °C, in the original packaging, protected from moisture and light.

Levonorgestrel can interact with other medicines, altering its effectiveness or increasing adverse effects.

Major Interactions (Avoid)

• Enzyme inducers: drugs such as rifampicin or carbamazepine may reduce levonorgestrel plasma levels, compromising contraceptive efficacy.
• Antifungal azoles: ketoconazole can increase levonorgestrel concentrations, raising risk of side effects.

Moderate Interactions (Monitor Closely)

• Antibiotics: certain antibiotics like metronidazole may slightly decrease effectiveness, requiring additional contraceptive measures.
• Antiepileptics: phenytoin may modestly lower hormone levels.
• Herbal supplements: St. John’s wort may reduce efficacy.