Harmonet (Ethinylestradiol, Gestodene)

Harmonet is indicated for hormonal contraception and is commonly prescribed to prevent pregnancy.

• Prevention of pregnancy in women of child‑bearing potential when taken as directed.
• Regulation of menstrual cycles, providing more predictable bleeding patterns.
• Reduction of menstrual‑related symptoms such as dysmenorrhea and heavy bleeding.
• Management of acne associated with hormonal fluctuations in some users.
• Potential benefit in reducing the risk of ovarian cyst formation.

Like other combined oral contraceptives, Harmonet may cause side effects, most of which are mild and transient.

Common

• Nausea or mild gastrointestinal discomfort, often occurring during the first cycles.
• Headache or migraine, which may vary in intensity.
• Breast tenderness or enlargement, typically resolving after continued use.
• Irregular spotting or breakthrough bleeding, especially in the initial months.
• Weight gain or fluid retention, usually modest and temporary.

Serious

• Deep vein thrombosis or pulmonary embolism, presenting with leg pain, swelling, or shortness of breath.
• Severe hypertension, stroke, or myocardial infarction, requiring immediate medical attention.
• Liver dysfunction or jaundice, indicated by yellowing of the skin or eyes.

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

• History of blood clots, stroke, or other cardiovascular disease.
• Current or past breast cancer or other estrogen‑dependent tumors.
• Uncontrolled hypertension or diabetes.
• Liver disease or impaired liver function.
• Smoking in women over 35 years of age.
• Pregnancy or planning to become pregnant.
• Severe migraine with aura.

Harmonet can interact with other medicines, which may alter its effectiveness or increase risks.

Avoid

• Antibiotics such as rifampicin, certain antiepileptics, and herbal St John’s wort that reduce hormone levels.
• Medications that induce hepatic enzymes, potentially decreasing contraceptive efficacy.

Use with caution

• Antifungal agents like ketoconazole, which may increase hormone concentrations.
• Some HIV protease inhibitors and certain antidepressants that can affect hormone metabolism.
• Medications that may increase the risk of thrombosis, requiring careful monitoring.