Harmonet (Ethinylestradiol, Gestodene)

Harmonet is prescribed for several hormonal indications related to reproductive health.

• Prevention of pregnancy as a combined oral contraceptive.
• Regulation of the menstrual cycle, helping to achieve more predictable bleeding patterns.
• Management of moderate to severe dysmenorrhea associated with ovulatory cycles.
• Treatment of acne that is responsive to hormonal therapy.
• Reduction of the risk of ovarian cyst formation in women with a history of functional cysts.

Like all hormonal contraceptives, Harmonet may cause a range of side effects; most are mild and resolve without treatment, but some require medical attention.

Common

• Nausea or mild stomach upset, often occurring during the first weeks of therapy.
• Breast tenderness or slight enlargement, which usually diminishes after continued use.
• Headache or migraine episodes, which may be relieved with over‑the‑counter analgesics.
• Spotting, breakthrough bleeding, or irregular periods, especially during the initial cycles.

Serious

• Leg pain, swelling, or sudden shortness of breath that could indicate a blood clot (deep‑vein thrombosis or pulmonary embolism).
• Severe hypertension or a rapid rise in blood pressure, which may present with headache, visual changes, or chest discomfort.
• Liver problems such as jaundice, dark urine, or persistent abdominal pain, suggesting hepatic dysfunction.

Before starting Harmonet, certain health considerations should be reviewed to ensure safe use.

• Contraindicated in women who are pregnant, breastfeeding, or have known or suspected pregnancy.
• Not recommended for individuals with a history of thromboembolic disorders, stroke, or myocardial infarction.
• Caution in smokers aged 35 years or older due to increased cardiovascular risk.
• Evaluate liver disease, as impaired hepatic function can affect hormone metabolism.
• Review any history of hormone‑sensitive cancers, such as breast or endometrial cancer.
• Consider potential worsening of migraine with aura.

Harmonet can interact with other medicines, which may alter its effectiveness or increase the risk of adverse events.

Avoid

• Strong enzyme inducers such as rifampicin, carbamazepine, phenytoin, or St John’s wort, which can reduce contraceptive efficacy.
• Certain antiviral medications (e.g., some protease inhibitors) that may affect hormone levels.

Use with caution

• Antifungal agents like ketoconazole or itraconazole, which can increase hormone concentrations.
• Selective serotonin reuptake inhibitors (SSRIs) that may heighten the risk of bleeding.
• Non‑steroidal anti‑inflammatory drugs (NSAIDs) that can increase blood pressure.