Harmonet (Ethinylestradiol, Gestodene)

Harmonet is indicated for women who seek reliable hormonal contraception and for the prevention of unintended pregnancy.

• Primary indication: prevention of pregnancy in women of reproductive age.
• Use as a combined oral contraceptive in a 21‑day active tablet regimen followed by a hormone‑free interval.
• May be prescribed for cycle regulation when menstrual irregularities are related to hormonal imbalance.
• Can be used as part of a contraceptive plan that includes barrier methods for added protection.
• Suitable for women who have no contraindications to estrogen‑containing contraceptives.

Side effects reported with Harmonet vary in frequency; most are mild and transient, while rare events may require medical attention.

Common

• Nausea or mild stomach upset
• Headache or migraine‑like pain
• Breast tenderness or enlargement
• Spotting or breakthrough bleeding between periods

Serious

• Deep vein thrombosis or pulmonary embolism
• Severe allergic reaction such as rash, itching, swelling
• Liver dysfunction indicated by jaundice or abnormal liver tests

Before prescribing Harmonet, clinicians assess individual risk factors and medical history to ensure safe use.

• Do not use if you have a history of thromboembolic disorders, stroke, or myocardial infarction.
• Avoid if you are pregnant, breastfeeding, or suspect pregnancy.
• Caution in smokers over 35 years of age due to increased cardiovascular risk.
• Review liver disease, hypertension, or diabetes before initiating therapy.
• Consider alternative contraception if you have migraine with aura.
• Monitor blood pressure regularly during use.
• Discuss any history of hormone‑sensitive cancers with your healthcare provider.

Harmonet can interact with other medicines, affecting its efficacy or increasing the risk of adverse effects.

Avoid

• Enzyme‑inducing anticonvulsants such as carbamazepine, phenytoin, or rifampicin.
• Certain antiretroviral drugs (e.g., efavirenz) that lower estrogen levels.
• St. John’s wort and other herbal supplements that induce hepatic metabolism.

Use with caution

• Antibiotics like tetracycline or metronidazole that may reduce contraceptive effectiveness.
• Antifungal agents (e.g., fluconazole) that can increase hormone concentrations.
• Diuretics or antihypertensives that may affect fluid balance and blood pressure.