How to Inject Omnitrope
Omnitrope (somatropin) is a recombinant human growth hormone given by subcutaneous injection, typically once daily. Use a prefilled pen or cartridge with pen injector as prescribed. Common sites are abdomen, upper arm, thigh, or buttocks—rotate to avoid irritation. Clean skin with alcohol swab, pinch skin, insert needle at 45-90 degree angle, inject slowly, then withdraw. Do not shake vial or pen.[1][2]
Preparing the Dose
For Omnitrope Pen 5 or 10:
- Check expiration and storage (refrigerate 36-46°F; don't freeze).
- Wipe rubber stopper with alcohol.
- Attach new needle, prime by dialing 2 units and pressing injection button until drops appear.
- Dial prescribed dose (usually 0.015-0.03 mg/kg/day for growth failure).[1]
Vials require reconstitution with bacteriostatic water, gentle swirling (no shaking), then drawing into syringe.[2]
Dosage by Condition
| Condition | Starting Dose | Max Dose | Notes |
|-----------|---------------|----------|-------|
| Growth hormone deficiency (kids) | 0.015-0.03 mg/kg/day | Body surface area-adjusted | Titrate based on growth response |
| Turner syndrome | 0.045-0.05 mg/kg/day | - | Split doses if >0.05 mg/kg |
| Prader-Willi | 0.5 mg/m²/day | 1 mg/m²/day | With diet/exercise |
| Idiopathic short stature | 0.45-0.475 mg/kg/week | Divided daily | Up to 4 years treatment |
| Adults (GHD) | ≤0.04 mg/kg/week | Titrate to IGF-1 | Divided 6-7 days/week[1][2] |
Adjust for age, weight, IGF-1 levels. Miss a dose? Skip and resume next day—don't double.
Storage and Handling
Refrigerate unused pens/vials. After first use, Omnitrope Pen good for 28 days at room temp (<77°F) or fridge. Discard if cloudy, discolored, or past 28 days. Needles one-time use only.[1]
Common Mistakes to Avoid
- Injecting IV/IM—subQ only.
- Sharing pens (infection risk).
- Overdosing without doctor adjustment.
- Ignoring rotation—lipohypertrophy risk.
What If I Miss a Dose or Have Side Effects?
Skip missed dose. Side effects: injection site reactions, headache, joint pain, swelling. Serious: high blood sugar, scoliosis progression (kids), increased cancer risk if predisposed. Stop and call doctor for severe pain, vision changes, or breathing issues. Overdose symptoms: hip/knee pain—seek ER.[2]
Always follow your doctor's instructions—dosing is individualized. Not for self-diagnosis.
[1]: Omnitrope Prescribing Information (Sandoz)
[2]: Drugs.com - Omnitrope