HumatroPen® Injection Device
HumatroPen is designed to provide flexibility and accuracy in dosing through wide dose ranges and fine dose increments. Each patient or the patient's parent or guardian must carefully read the HumatroPen User Manual and the Patient Information on Cartridges, which includes reconstitution instructions, before using the HumatroPen. The User Manuals can be downloaded from the User Manuals section of this page, and you can view the Patient Information on Cartridges here.
To help you select which HumatroPen may be appropriate for your patient, use the HumatroPen Selection Tool to view dose ranges and dose increments for each HumatroPen.
Select Safety Information
- Hypersensitivity Humatrope is contraindicated in patients with a known sensitivity to somatropin or the supplied diluent. Localized reactions are the most common hypersensitivity reactions. Patients with a known sensitivity to either metacresol or glycerin should not receive Humatrope reconstituted with the supplied diluent for Humatrope.
To help patients start treatment successfully, Humatrope DirectConnect provides—at no cost:
*In-home training subject to state regulations and availability of trained Nurse Educators.
We’ll talk with your patient/caregiver to understand their needs as we schedule personal HumatroPen® training. If needed, we’ll train multiple caregivers and conduct multiple sessions. We will help make training more convenient for your patients and their caregivers. To schedule training or learn more about Humatrope DirectConnect, please have your patient call 1-84Humatrope (1-844-862-8767) 8 AM to 8 PM, Monday–Friday Eastern time.
Click the image below to visit the patient site and watch a step-by-step instructional video about how to use the HumatroPen.
View User Manuals
Each patient or the patient's parent or guardian must carefully read the HumatroPen® User Manual before using the HumatroPen (please see links below). In addition, you can provide the Humatrope Vial (5 mg) Instructions for Use if your patients happen to be prescribed the Humatrope vial and syringe.
- Humatrope is available in a 5 mg vial.
- Each vial is supplied in a combination package with an accompanying 5 mL of diluent.
- If sensitivity to the Diluent for Humatrope should occur, the vials may be reconstituted with Bacteriostatic Water for Injection (Benzyl Alcohol preserved), United States Pharmacopoeia (USP) or Sterile Water for Injection, USP.
- When Humatrope is reconstituted with Bacteriostatic Water for Injection, USP, the solution should be kept refrigerated at 36° to 46°F (2° to 8°C) and used within 14 days.
- It is important to note that benzyl alcohol used as a preservative in Bacteriostatic Water has been associated with toxicity in newborns. Therefore, Bacteriostatic Water for Injection must not be used to reconstitute Humatrope for use in a newborn infant. When Humatrope is to be administered to a newborn infant, it should be reconstituted with the diluent provided or, if the infant is sensitive to the diluent, Sterile Water for Injection, USP.
- When reconstituted with Sterile Water for Injection, the solution should be kept refrigerated at 36° to 46°F (2° to 8°C) and used within 24 hours. Use only 1 dose per Humatrope vial and discard the unused portion.
About HumatroPen Selection
After calculating the appropriate dose, locate that dose in the columns below and then look to the far left to determine the number of doses that a single cartridge may provide. This can help you prescribe the appropriate number of cartridges and let you inform patients how often they will need to change the cartridge in their Pen.
- Growth hormone (GH) deficiency.
- Turner syndrome.
- Idiopathic short stature, defined by height standard deviation score ≤-2.25, associated with growth rates unlikely to result in normal adult height, in whom other causes of short stature have been excluded.
- SHOX deficiency.
- Small for gestational age birth, with failure to show catch-up growth by 2 to 4 years of age.
- Adult-onset, as a result of pituitary disease, hypothalamic disease, surgery, radiation therapy, or trauma; or
- Childhood-onset. Patients treated for GH deficiency in childhood who have closed epiphyses should be reevaluated to determine if they should continue growth hormone.
- Acute Critical Illness: Somatropin should not be used to treat patients with acute critical illness due to complications following open heart surgery, abdominal surgery or multiple accidental trauma, or those with acute respiratory failure. A significant increase in mortality has been reported in such cases.
- Prader-Willi Syndrome in Children: Somatropin should not be used in pediatric patients with Prader-Willi syndrome who are severely obese, have a history of upper airway obstruction or sleep apnea, or have severe respiratory impairment. There have been reports of sudden death when somatropin was used in such patients. Humatrope is not indicated for the treatment of pediatric patients who have growth failure due to genetically confirmed Prader-Willi syndrome.
- Active Malignancy: Somatropin is contraindicated in patients with any evidence of active malignancy. Growth hormone deficiency may be an early sign of a pituitary tumor or other intracranial tumor; the presence of such a tumor should be excluded before initiation of somatropin treatment.
- Diabetic Retinopathy: Somatropin is contraindicated in patients with active proliferative or severe non-proliferative diabetic retinopathy.
- Closed Epiphyses: Somatropin should not be used for growth promotion in pediatric patients with closed epiphyses.
- Hypersensitivity: Humatrope is contraindicated in patients with a known sensitivity to somatropin or the supplied diluent. Localized reactions are the most common hypersensitivity reactions. Patients with a known sensitivity to either metacresol or glycerin should not receive Humatrope reconstituted with the supplied diluent for Humatrope.
- Acute Critical Illness: Increased mortality in patients with acute critical illness due to complications following open heart surgery, abdominal surgery or multiple accidental trauma, or those with acute respiratory failure has been reported after treatment with pharmacologic doses of somatropin.
- Prader-Willi Syndrome in Children: There have been reports of fatalities after initiating therapy with somatropin in pediatric patients with Prader-Willi syndrome who had one or more of the following risk factors: severe obesity, history of upper airway obstruction or sleep apnea, or unidentified respiratory infection. Male patients with one or more of these factors may be at greater risk than females. Patients with Prader-Willi syndrome should be evaluated for signs of upper airway obstruction and sleep apnea before initiation of treatment with somatropin.
- Neoplasms: An increased risk of a second neoplasm has been reported for childhood cancer survivors treated with somatropin for GH deficiency that developed following radiation to the brain/head. Intracranial tumors, in particular meningiomas, were the most common of these. The relationship between somatropin therapy and CNS tumor recurrence in adults is unknown. Monitor for progression or recurrence in patients receiving somatropin therapy who have a history of GH deficiency secondary to an intracranial neoplasm. Thoroughly consider the risks and benefits of starting somatropin in children at increased risk for developing malignancies due to certain rare genetic causes. These patients should be carefully monitored for development of neoplasms. Any pre-existing nevi should be monitored carefully for increased growth or malignant transformation.
- Glucose Intolerance and Diabetes Mellitus: Previously undiagnosed impaired glucose tolerance and overt diabetes mellitus may be unmasked during somatropin treatment. New-onset type 2 diabetes mellitus has been reported. As a result, blood glucose concentrations should be monitored periodically in all patients taking somatropin, especially in those with risk factors for diabetes mellitus. Patients with pre-existing type 1 or type 2 diabetes mellitus or impaired glucose tolerance should be monitored closely during somatropin treatment.
- Intracranial Hypertension: Intracranial hypertension with papilledema, visual changes, headache, nausea, and/or vomiting have been reported in a small number of patients treated with somatropin. Funduscopic examination is recommended at the initiation of and periodically during therapy. If papilledema is observed by funduscopy during treatment with somatropin, treatment should be stopped and the patient’s condition should be reassessed before treatment is resumed.
- Fluid Retention: Transient and dose-dependent fluid retention during somatropin replacement in adults may frequently occur.
- Hypopituitarism: In patients with hypopituitarism, standard hormone replacement therapy should be monitored closely when somatropin therapy is administered.
- Hypothyroidism: Patients treated with somatropin should have periodic thyroid function tests, and thyroid hormone replacement therapy should be initiated or appropriately adjusted in cases of unmasked or worsening hypothyroidism.
- Slipped Capital Femoral Epiphysis in Pediatric Patients: Slipped capital femoral epiphysis may occur more frequently in patients with endocrine disorders and in patients undergoing rapid growth. Any pediatric patient with the onset of a limp or complaints of hip or knee pain during somatropin therapy should be carefully evaluated.
- Progression of Scoliosis in Pediatric Patients: Progression of scoliosis can occur in patients who experience rapid growth. Somatropin has not been shown to increase the occurrence of scoliosis.
- Otitis Media and Cardiovascular Disorders in Patients with Turner Syndrome: Patients with Turner syndrome should be evaluated carefully for otitis media and other ear disorders as somatropin treatment may increase the occurrence of otitis media in these susceptible patients. In addition, patients with Turner syndrome should be monitored closely for cardiovascular disorders (e.g., hypertension, aortic aneurysm or dissection, stroke) as they are at increased risk for these conditions.
- Pancreatitis: Cases of pancreatitis have been reported rarely in children and adults receiving somatropin. Pancreatitis should be considered in any somatropin-treated patient, especially a child, who develops abdominal pain. Girls who have Turner syndrome may be at greater risk than other somatropin-treated children.
- Local and Systemic Reactions: Injection site should be rotated to avoid tissue atrophy. Patients should be informed that local or systemic allergic reactions may occur and that prompt medical attention should be sought in such cases.
- Laboratory Tests: Serum levels of inorganic phosphorus, alkaline phosphatase, parathyroid hormone and IGF-I may increase after somatropin therapy.
- Pregnancy/Nursing Mothers: Somatropin should be used during pregnancy only if clearly needed and with caution in nursing mothers because it is not known whether somatropin is excreted in human milk.
- Special Populations: The safety and effectiveness of somatropin in patients aged 65 years and over have not been evaluated in clinical studies. Elderly patients may be more sensitive to the action of somatropin and may be more prone to adverse reactions.
- Potential Drug Interactions:
- Somatropin inhibits 11β-hydroxysteroid dehydrogenase type 1 (11βHSD-1) in adipose/hepatic tissue and may significantly impact the metabolism of cortisol and cortisone. As a consequence, in patients treated with somatropin, previously undiagnosed central (secondary) hypoadrenalism may be unmasked, requiring glucocorticoid replacement therapy.
- Careful monitoring is advisable when growth hormone is administered in combination with insulin and/or other hypoglycemic agents, other drugs metabolized by CYP450 liver enzymes (e.g., hydrocortisone or other corticosteroids, sex steroids, anticonvulsants, cyclosporine), or other hormone replacement therapy.
- Common adverse reactions reported in adult and pediatric patients taking somatropin include injection site reactions, hypersensitivity to the diluent, and hypothyroidism. Additional common adverse reactions in adults include edema, arthralgia, myalgia, carpal tunnel syndrome, paresthesias, and hyperglycemia.