Deca Durabolin is an anabolic steroid containing nandrolone decanoate, primarily used to treat conditions like osteoporosis in postmenopausal women, anemia due to chronic renal failure or aplastic anemia, and certain protein deficiency states following major surgery or trauma. It is administered via deep intramuscular injection, typically every 2 to 3 weeks, depending on the specific condition being treated. The medication works by promoting tissue growth and improving protein synthesis in the body. Common side effects include acne, swelling of the ankles or feet, nausea, and breast enlargement. Deca Durabolin is contraindicated in individuals who are pregnant, breastfeeding, have prostate or breast cancer, or are allergic to peanuts or soy. It should be used under the supervision of a healthcare professional to monitor for potential side effects and interactions.