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There is currently no manufacturer warning information available for this drug.
Medroxyprogesterone Acetate Injectable Suspension, USP is indicated only for the prevention of pregnancy. The loss of bone mineral density (BMD) in women of all ages and the impact on peak bone mass in adolescents should be considered, along with the decrease in BMD that occurs during pregnancy and/or lactation, in the risk/benefit assessment for women who use Medroxyprogesterone Acetate Injectable Suspension, USP long-term [see Warnings and Precautions (5.1)].
Medroxyprogesterone Acetate Injectable Suspension, USP contains medroxyprogesterone acetate, a derivative of progesterone, as its active ingredient. Medroxyprogesterone acetate is active by the parenteral and oral routes of administration. It is a white to off-white; odorless crystalline powder that is stable in air and that melts between 200°C and 210°C. It is freely soluble in chloroform, soluble in acetone and dioxane, sparingly soluble in alcohol and methanol, slightly soluble in ether, and insoluble in water.
The chemical name for Medroxyprogesterone Acetate is pregn-4-ene-3,20-dione, 17-(acetyloxy)-6-methyl-, (6α-).
The structural formula is as follows:

Medroxyprogesterone Acetate Injectable Suspension, USP for intramuscular (IM) injection is available in vials and prefilled syringes, each containing 1 mL of medroxyprogesterone acetate sterile aqueous suspension 150 mg/mL.
For Medroxyprogesterone Acetate Injectable Suspension, USP vials, each mL contains:
| Medroxyprogesterone acetate | 150 mg |
| Polyethylene glycol 3350 | 28.9 mg |
| Polysorbate 80 | 2.41 mg |
| Sodium chloride | 8.68 mg |
| Methylparaben | 1.37 mg |
| Propylparaben | 0.150 mg |
| Water for injection | quantity sufficient |
When necessary, pH is adjusted with sodium hydroxide or hydrochloric acid, or both.
For Medroxyprogesterone Acetate Injectable Suspension, USP prefilled syringes, each mL contains:
| Medroxyprogesterone acetate | 150 mg |
| Polyethylene glycol 3350 | 28.5 mg |
| Polysorbate 80 | 2.37 mg |
| Sodium chloride | 8.56 mg |
| Methylparaben | 1.35 mg |
| Propylparaben | 0.147 mg |
| Water for injection | quantity sufficient |
When necessary, pH is adjusted with sodium hydroxide or hydrochloric acid, or both.