rHGH Somatropin 45iu Vial 3 Vial + BW UNITROPIN (somatropin [rDNA origin] for injection) is indicated for replacement of endogenous human growth hormone (hgh) in select patient populations with growth hormone deficiency, generally due to inadequate secretion of endogenous human growth hormone (hgh). In vitro, preclinical, and clinical tests have demonstrated that UNITROPIN lyophilized powder is therapeutically equivalent to human growth hormone of pituitary origin and achieves similar pharmacokinetic profiles in normal adults