Somatropin is a form of human growth hormone important for the growth of bones and muscles.

Somatropin is used to treat growth failure in children and adults who lack natural growth hormone. This includes people with short stature due to Noonan syndrome, Turner syndrome, Prader-Willi syndrome, short stature at birth with no catch-up growth, and other causes.

Somatropin is also used in adults to treat short bowel syndrome, or to prevent severe weight loss related to AIDS.

Somatropin may also be used for purposes not listed in this medication guide.

You should not use this medicine if you are allergic to somatropin or benzyl alcohol, or if you have:

• a serious illness due to lung failure, or complications from recent surgery, injury, or medical trauma;
• closed epiphyses;
• active cancer;
• eye problems caused by diabetes (diabetic retinopathy); or
• you are being treated for Prader-Willi syndrome and you are overweight or have severe breathing problems (including sleep apnea).

Tell your doctor if you have ever had:

• cancer (especially during childhood);
• diabetes;
• breathing problems, sleep apnea (breathing stops during sleep);
• a pituitary gland disorder;
• abnormal curvature of the spine (scoliosis);
• underactive thyroid;
• a head injury or brain tumor; or
• childhood brain cancer and radiation treatment.

In some cases, somatropin should not be used in a child. Certain brands of somatropin contain an ingredient that can cause serious side effects or death in very young infants or premature babies. Do not give this medicine to a child without medical advice.

Tell your doctor if you are pregnant or breastfeeding.

Use Saizen Kit (Injectable) exactly as directed on the label, or as prescribed by your doctor. Do not use in larger or smaller amounts or for longer than recommended.

Get emergency medical help if you have signs of an allergic reaction: hives; difficult breathing; swelling of your face, lips, tongue, or throat.

Serious breathing problems may occur in patients with Prader-Willi syndrome who use somatropin. If you have Prader-Willi syndrome, call your doctor promptly if you develop signs of lung or breathing problems such as shortness of breath, coughing, or new or increased snoring.

Also call your doctor at once if you have:

• pain in your knees or hips, walking with a limp;
• ear pain, swelling, warmth, or drainage;
• numbness or tingling in your wrist, hand, or fingers;
• severe swelling or puffiness in your hands and feet;
• changes in behavior;
• vision problems, unusual headaches;
• changes in the shape or size of a mole;
• pain or swelling in your joints;
• pancreatitis--severe pain in your upper stomach spreading to your back, nausea and vomiting;
• high blood sugar--increased thirst, increased urination, dry mouth, fruity breath odor;
• increased pressure inside the skull--severe headaches, ringing in your ears, dizziness, nausea, vision problems, pain behind your eyes; or
• signs of an adrenal gland problem--extreme weakness, severe dizziness, weight loss, changes in skin color, feeling very weak or tired.

Common side effects may include:

• pain, itching, or skin changes where the medicine was injected;
• swelling, rapid weight gain;
• muscle or joint pain;
• numbness or tingling;
• stomach pain, gas;
• headache, back pain; or
• cold or flu symptoms, stuffy nose, sneezing, sore throat, ear pain.

This is not a complete list of side effects and others may occur. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.

If you use Zorbtive to treat short bowel syndrome, avoid drinking fruit juices or soda beverages.

Avoid drinking alcohol if you have short bowel syndrome. Alcohol can irritate your stomach and could make your condition worse.