Harmonet (Ethinylestradiol, Gestodene)

Harmonet is a prescription combined oral contraceptive tablet that contains the synthetic estrogen ethinylestradiol and the progestogen gestodene. Marketed in the European Union, each tablet delivers a fixed dose of these hormones to provide reliable contraception. The product is taken by mouth and is classified under the ATC code G03AA07. Harmonet works by suppressing ovulation and creating cervical and endometrial conditions unfavorable for pregnancy in women of reproductive age.

Harmonet is indicated for the prevention of pregnancy in women who choose an oral hormonal method.

- Primary use: contraception for up to 12 months of continuous use. - Can be used to regulate menstrual cycles. - May be prescribed for treatment of moderate acne related to androgen excess. - Provides cycle control for women with irregular periods.

Like other combined oral contraceptives, Harmonet may cause side effects that vary in frequency and severity.

Common: - Nausea or mild stomach upset. - Breast tenderness. - Spotting or breakthrough bleeding.

Serious: - Deep vein thrombosis or pulmonary embolism. - Stroke or transient ischemic attack. - Severe liver dysfunction or jaundice.

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

- Contraindicated during pregnancy; must not be used by pregnant women. - Avoid if you have a history of thromboembolic disorders. - Use with caution if you have hypertension or diabetes. - Smoking more than 15 cigarettes per day increases cardiovascular risk. - Not recommended for estrogen‑dependent tumors or severe liver disease. - Should not be initiated within two weeks postpartum if breastfeeding.

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

Avoid: - Antibiotics such as rifampin or griseofulvin that lower hormone levels. - Anticonvulsants like carbamazepine, phenytoin, or phenobarbital. - HIV protease inhibitors (e.g., ritonavir) that may reduce contraceptive efficacy.

Use with caution: - Antifungal azoles (e.g., ketoconazole) that may increase hormone concentrations. - St. John’s wort herbal supplement, which can lower effectiveness. - Diuretics that may alter fluid balance and blood pressure.