Ortho Tri-Cyclen Lo 28 contains a combination of two hormones: 0.5 mg of norethindrone (a progestin) and 20 mcg of ethinyl estradiol (an estrogen). These hormones work together to prevent pregnancy primarily by suppressing ovulation, thickening cervical mucus to block sperm, and altering the uterine lining to hinder implantation.
How the Hormones Work
Norethindrone primarily affects the uterine lining and cervical mucus, while Ethinyl estradiol plays a more significant role in suppressing ovulation. The combined action of these hormones provides highly effective contraception.
Important Considerations
Remember to consult your doctor before starting Ortho Tri-Cyclen Lo 28, especially if you have a history of blood clots, high blood pressure, liver disease, or breast cancer. This medication carries potential side effects, including mood changes, weight fluctuations, and headaches. Regular check-ups are recommended to monitor your health while using this contraceptive.
Proper Usage
Take one tablet daily at the same time each day, following the order on the package. Consistent usage is critical for its effectiveness. If you miss a pill, follow the instructions in the patient information leaflet provided with your prescription.


