April 4 (Reuters) - CVS Caremark, the pharmacy benefit management subsidiary of CVS Health Corp, will add Perrigo's birth control pill to its preventive services oral contraceptives list and make it available at no cost for many plan sponsors, according to a pharmacy update on March 28.

The U.S. FDA in July approved over-the-counter use of Perrigo's drug Opill, making it the first oral contraceptive in the country which can be purchased without prescription.

Opill was first approved for prescription use in 1973.

Last month, Perrigo said Opill would be available at major retailers for a price of $19.99 and $49.99 for a one-month and three-month supply, respectively.

On Thursday, drugstore chain operator Rite Aid said Opill would be available at its pharmacies in all locations. (Reporting by Christy Santhosh and Aishwarya Jain in Bengaluru; Editing by Vijay Kishore)