Levostrol (Ethinylestradiol, Levonorgestrel)

Levostrol is a combined hormonal contraceptive that acts on the reproductive endocrine system to prevent pregnancy and manage menstrual disorders.

• Prevention of pregnancy: provides reliable contraceptive protection for women of reproductive age.
• Regulation of menstrual cycles: helps achieve more predictable bleeding patterns.
• Management of hormone‑related menstrual disorders: can reduce dysmenorrhea and heavy menstrual bleeding.

• Ethinylestradiol and Levonorgestrel bind to estrogen and progesterone receptors, respectively, suppressing the hypothalamic‑pituitary‑gonadal axis. This inhibition prevents the mid‑cycle luteinizing hormone surge, thereby blocking ovulation, while also thickening cervical mucus and altering the endometrial lining to reduce the likelihood of implantation.

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

Common Side Effects

• Nausea: mild to moderate stomach upset.
• Breast tenderness: discomfort or swelling of the breasts.
• Headache: occasional throbbing or tension‑type pain.
• Spotting between periods: light vaginal bleeding.
• Weight gain: modest increase in body weight.
• Mood changes: irritability or mild mood swings.

Serious or Rare Side Effects

• Deep vein thrombosis: blood clot formation in the legs.
• Pulmonary embolism: clot migration to the lungs.
• Stroke or transient ischemic attack: neurological events.
• Myocardial infarction: heart attack risk.
• Severe allergic reaction: rash, swelling, or anaphylaxis.
• Liver dysfunction: jaundice or abnormal liver enzymes.

Before prescribing Levostrol, clinicians should evaluate patient history and risk factors.

• Contraindicated in pregnancy: product must not be used by pregnant women.
• Avoid in women with a history of thromboembolic disorders: increased risk of clotting events.
• Do not use in smokers over 35 years: higher cardiovascular risk.
• Monitor blood pressure regularly: oral contraceptives may elevate blood pressure.
• Assess liver function: hepatic disease may affect drug metabolism.
• Store at ambient temperature: keep below 25°C, in the original pack, and protect from moisture.

Levostrol can interact with several medication classes, altering its effectiveness or safety profile.

Major Interactions (Avoid)

• Enzyme‑inducing anticonvulsants (e.g., carbamazepine, phenytoin): may reduce contraceptive efficacy.
• Rifampin or other strong CYP3A4 inducers: can decrease hormone levels.
• Protease inhibitors (e.g., ritonavir): may increase hormone concentrations leading to toxicity.

Moderate Interactions (Monitor Closely)

• Tetracycline antibiotics: may slightly reduce effectiveness.
• St. John’s wort: may lower hormone levels.
• Diuretics that cause electrolyte imbalance: may affect fluid balance and blood pressure.