What are the possible side effects of Opill?

Opill is a new progestin-only birth control pill (also called the mini-pill), that is available over the counter. A store brand version, simply called “norgestrel daily oral contraceptive,” is also available at Walgreens and CVS. Like other brands of the mini-pill, some people can have side effects. They may include headaches, bleeding changes, sore breasts, nausea, acne, and a change in your sex drive.