Tigecycline Storage Basics
Tigecycline, sold as Tygacil by Pfizer, requires refrigeration for its lyophilized powder. Unreconstituted vials must be stored at 2°C to 8°C (36°F to 46°F) and protected from light until use.[1] Once reconstituted, it remains stable for up to 6 hours at room temperature or 24 hours refrigerated.[2]
Do Generics Match These Requirements?
Yes, tigecycline generics follow the same storage rules as the brand. FDA-approved generics, like those from Sandoz and Fresenius Kabi, specify refrigeration at 2°C to 8°C for unopened vials, with identical post-reconstitution stability.[3][4] No deviations appear in labeling; manufacturers align with Tygacil's monograph to ensure bioequivalence.
Why Refrigeration Matters for Tigecycline
Tigecycline's glycylcycline structure degrades faster at higher temperatures or with light exposure, risking potency loss. Real-world reports note efficacy drops if vials exceed 8°C for extended periods, prompting hospitals to use monitored fridges.[5]
Handling Reconstituted or Infused Doses
After mixing with diluents like 0.9% sodium chloride, administer within 6 hours at room temperature (≤25°C or 77°F) or 24 hours if refrigerated. Avoid freezing reconstituted product, as it causes precipitation.[1][3]
Shelf Life and Expiry Differences
Brand and generics have a 24-month shelf life when refrigerated unopened. Generics from recent approvals (e.g., 2023) match this, but check lot-specific expiry on packaging—post-expiry storage voids stability guarantees.[4]
Common Patient and Pharmacy Questions
Hospitals often ask about shipping: generics ship refrigerated via validated cold chains. For home use (rare for IV tigecycline), patients need cooler packs. Heat exposure during transport can lead to returns; pharmacies discard if chain-of-custody logs show temperature excursions.[5]
[1]: Tygacil Prescribing Information (Pfizer)
[2]: FDA Label for Tigecycline Injection (Reference Listed Drug)
[3]: Sandoz Tigecycline FDA Approval Label
[4]: Fresenius Kabi Tigecycline Label
[5]: USP <1079> Good Storage Practices