Standard Procedure for Reconstituting Omnitrope Powder
Omnitrope (somatropin) 5.8 mg powder for solution comes as a lyophilized vial that requires mixing with a diluent before injection. This is a prescription product; follow your doctor's instructions and the package insert exactly. Always use sterile technique to avoid contamination.
1. Wash hands and clean the tops of the powder vial and diluent cartridge (Bacteriostatic Water for Injection) with alcohol swabs.
2. Remove the diluent cartridge from refrigeration and let it reach room temperature (up to 30 minutes if cold).
3. Peel off the protective tab from the reconstitution device (pre-assembled cartridge holder with vial adapter).
4. Insert the diluent cartridge into the holder with the open end first, then screw the powder vial tightly onto the adapter until it locks.
5. Slowly twist the dilution knob clockwise 90 degrees to release the diluent into the powder vial. Do not shake.
6. Wait 3 minutes for the powder to fully dissolve. Gently swirl if needed; the solution should be clear.
7. Turn the knob another 90 degrees clockwise to draw the mixed solution back into the cartridge.
The mixed solution is now ready for loading into a compatible pen injector (like Omnitrope Pen 5 or 10) for dosing.[1][2]
Storage After Mixing
Store the cartridge at 36-46°F (2-8°C) in the refrigerator (up to 28 days). Do not freeze or expose to heat/light. Discard if cloudy, discolored, or past expiration.[1][2]
Common Mistakes and What Happens If...
- Shaking the vial: Causes protein denaturation, making it ineffective. Always swirl gently.
- Using wrong diluent: Only use the provided Bacteriostatic Water; tap water or saline can cause instability.
- Mixing too fast: Leads to incomplete dissolution or foaming. Patience prevents bubbles that affect dosing accuracy.
- Ignoring temperature: Cold diluent injected too quickly risks discomfort or poor mixing.[2]
Dosage and Who It's For
Typical pediatric dose: 0.03-0.045 mg/kg/day subcutaneously. Adults with growth hormone deficiency: 0.15-0.3 mg/day, titrated. Not for self-adjustment—physicians calculate based on weight, IGF-1 levels, and condition (e.g., GHD, Turner syndrome).[1]
Where to Get Supplies and Alternatives
Requires a prescription. Kits include powder vial, diluent cartridge, and device. If issues arise, contact Sandoz (manufacturer) at 1-877-OMNI-ROPE or your pharmacy. Alternatives like Norditropin or Genotropin use pre-filled pens (no mixing needed).[1][3]
[1]: Omnitrope Prescribing Information, Sandoz Inc., https://www.omnitrope.com/
[2]: Omnitrope Patient Instructions for Use, https://www.omnitrope.com/hcp/resources
[3]: Drugs.com - Omnitrope, https://www.drugs.com/omnitrope.html