Long Acting Reversible Contraceptives (LARCs) are effective forms of birth control that work without requiring you to take any additional action for a long time. LARCs include implants like Nexplanon and IUDs. The advantage of using a LARC is that it doesn’t require a patient to do anything (other than see a healthcare professional regularly). It is generally more effective because it removes the need for patients to remember to do something every day or once a month.