if this is left out of the refrigerator but in a dark location, how long can this be left out before the solution is affected?
Store between 2 and 8°C. Do not freeze. Product which has been exposed to freezing should not be used. Tuberculin PPD solutions can be adversely affected by exposure to light. The product should be stored in the dark except when doses are actually being withdrawn from the vial. A vial of Tuberculin PPD which has been entered and in use for 1 month should be discarded because oxidation and degradation may have reduced the potency.
From the description above - it must be kept in the fridge. I'm not sure whether once they start using the solution, that particular vial is left outside ... if that's the case then I suppose it can be kept outside in the dark for 1 month.
- Tubersol Information for Consumers
- Tubersol Information for Healthcare Professionals (includes dosage details)
- Side Effects of Tubersol (detailed)
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