For safety reasons, it is recommended that women use the lowest effective dose of medroxyprogesterone.
(To learn more about the 2.5-mg strength of medroxyprogesterone acetate, as well as the other forms and strengths, click Medroxyprogesterone. This eMedTV article gives a comprehensive overview of this prescription drug, with information on how it works, who makes it, what to do in cases of overdose, and more.)