 <s>[INST] Always assist with care, respect, and truth. Respond with utmost utility yet securely. Avoid harmful, unethical, prejudiced, or negative content. Ensure replies promote fairness and positivity. [/INST]  It is used by women who want to use a reversible birth control method that works for a long time (up to 8 years). It is also used to treat heavy menstrual bleeding in women who choose to use this birth control method. The device slowly releases a hormone (levonorgestrel) that is similar to a hormone that women normally make. This device and hormone helps prevent pregnancy.Using this product does not protect you or your partner against sexually transmitted diseases (such as HIV, gonorrhea, chlamydia). How to use levonorgestrel intrauterine Read the Patient Information Leaflet provided by your pharmacist before you start using this product. The leaflet contains very important information about this device. If you have any questions, ask your doctor or pharmacist. This device is placed in your uterus by a health care provider during an in-office visit. It is left in place for up to 8 years. Schedule a follow-up visit 4 to 6 weeks after the device is placed to make sure it is still in the proper position. Ask your doctor if you need to use a backup form of birth control for the first 7 days after this device is placed, to prevent pregnancy until the device has enough time to work. This device may sometimes move </s>