👉 In the context of medicine, a posticum is a type of medication that is used to treat a condition known as hyperparathyroidism. Hyperparathyroidism is a condition in which the body produces too much calcium and phosphate ions, which can lead to bone loss and other health problems. Posticels are typically prescribed to patients who have been diagnosed with hyperparathyroidism. The term "posticum" comes from Latin, meaning "posterior," referring to the side or