Recommended Dose: Take one tablet orally once daily at the same time each day for 21 consecutive days, followed by a 7-day tablet-free interval. Start the next pack on the 8th day, regardless of whether withdrawal bleeding has ended.

Time: It is recommended to start on the first day of menstruation. Withdrawal bleeding usually occurs 2–3 days after the last tablet.

Instructions for use: Swallow the tablet with water and follow the order indicated on the blister pack. If a tablet is missed by 12 hours or less, take it immediately. If more than 12 hours have elapsed, contraceptive protection may be reduced and additional barrier contraception should be used for 7 days. Treatment for acne or hirsutism generally requires 3–6 months before clinical improvement can be assessed.

Interaction: Enzyme-inducing medicines (e.g., rifampicin, carbamazepine, oxcarbazepine, topiramate, and St. John’s wort) may reduce contraceptive and anti-androgen efficacy. Do not use concurrently with other hormonal contraceptives.

Side effects: Common adverse reactions include breakthrough bleeding, breast tenderness, headache, nausea, mood changes, weight changes, and decreased libido. Rare but serious reactions include venous or arterial thromboembolism, myocardial infarction, stroke, severe liver disorders, and hypersensitivity reactions.