Somatropin injection comes as a solution (liquid) in prefilled dosing pens and cartridges and also as a powder in vials and cartridges to be mixed with liquid to be injected subcutaneously (under the skin). Your doctor will tell you how often to use somatropin injection based on your condition and age. Use somatropin injection at around the same time on each scheduled day. Use somatropin injection exactly as directed. Ask your doctor or pharmacist to explain any part you do not understand. Do not use more or less of it or take it more often than prescribed by your doctor.Your doctor may start you on a low dose of somatropin injection and may gradually increase your dose.You may receive your first dose of somatropin injection in your doctor's office or your doctor may allow you or a caregiver to perform the injections at home. Before you use somatropin injection for the first time, you or the person who will be giving the injections should read the manufacturer's information for the patient that comes with it. These instructions describe how to inject a dose of somatropin. Be sure that you understand these directions. Ask your healthcare provider if you have any questions about how or where to inject the medication or how to dispose of used needles and syringes after you inject the medication.Continue to use somatropin injection even if you feel well. Do not stop using somatropin injection without talking to your doctor.Always look at somatropin solution before injecting it. Check that the expiration date has not passed and that the liquid is clear and colorless. The liquid should not contain visible particles. Do not use if it is expired or if the liquid is cloudy or contains particles.Do not reuse or share syringes, needles, injection pens, or vials of medication. Dispose of used syringes, needles, injection pens, and vials in a puncture resistant container that is out of the reach of children. Talk to your doctor or pharmacist about how to dispose of the puncture-resistant container.Ask your pharmacist or doctor for a copy of the manufacturer's information for the patient.Other uses for this medicine, Somatropin is a human growth hormone (HGH, hGH) used to treat growth failure, short bowel syndrome, and HIV-associated wasting. Includes side effects, interactions, and indications., GH is a 191- amino acid, single-chain polypeptide that is synthesized, stored and secreted by somatotropic cells within the lateral wings of the anterior pituitary gland. A recombinant form of HGH called somatropin (INN) is used as a prescription drug to treat children's growth disorders and adult growth hormone deficiency..