Levonorgestrel Rowex (Levonorgestrel)

Levonorgestrel is a synthetic progestogen used in hormonal contraception and emergency contraception pathways.

• Emergency contraception: prevents pregnancy when taken shortly after unprotected sex.
• Regular contraception: provides ongoing birth control as a progestin‑only method.
• Menstrual cycle regulation: can be used to adjust timing of menses in certain clinical protocols.

• Levonorgestrel binds to progesterone receptors in the hypothalamus and pituitary, suppressing the luteinizing hormone surge and thereby inhibiting ovulation. It also induces changes in the cervical mucus and endometrial lining, making the environment less suitable for sperm penetration and implantation of a fertilized egg.

Levonorgestrel may cause a range of adverse reactions, from mild to serious.

Common Side Effects

• Nausea: mild to moderate stomach upset.
• Headache: transient tension‑type headaches.
• Abdominal pain: cramping or discomfort.
• Fatigue: feeling unusually tired.
• Dizziness: light‑headed sensations.
• Menstrual changes: spotting or altered flow.

Serious or Rare Side Effects

• Allergic reaction: rash, swelling, or anaphylaxis.
• Severe abdominal pain: could indicate ectopic pregnancy.
• Chest pain: may signal cardiovascular issues.
• Blood clots: rare thromboembolic events.
• Liver dysfunction: abnormal liver enzymes.
• Severe mood changes: depression or suicidal thoughts.

Before using Levonorgestrel Rowex, certain safety considerations are recommended.

• Assess medical history: verify absence of active thromboembolic disease or severe liver impairment.
• Confirm non‑pregnancy: ensure a negative pregnancy test prior to administration.
• Review concurrent medications: check for drugs that may reduce efficacy.
• Monitor for adverse reactions: advise patients to report severe abdominal pain, allergic signs, or unusual bleeding.
• Store at ambient temperature: keep below 25°C in the original packaging, protect from moisture.

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

Major Interactions (Avoid)

• Rifampin: induces metabolism, reducing contraceptive efficacy.
• Anticonvulsants (e.g., carbamazepine, phenytoin): lower plasma levels, risking failure.
• St. John’s Wort: herbal inducer that may diminish effectiveness.

Moderate Interactions (Monitor Closely)

• Azole antifungals (e.g., ketoconazole): may increase levonorgestrel concentrations.
• Protease inhibitor antiretrovirals: can alter drug metabolism.
• Estrogen‑containing hormonal therapies: may raise thromboembolic risk when combined.