Zomacton or somatropin, is a medication that is used in hormone replacement therapy for a deficiency in human growth hormone. The hormone in the medication is made by using E. Coli or mammal cells.

Zomacton is one of several types of human growth hormone medications and is used for several different conditions. Growth hormone deficiency, failure to grow, and AIDS wasting are some of the indications for the medication.

Different forms of somatropin should not be used interchangeably as each may have different indications and dosing recommendations.