Drug packaging may involve the addition of one or more packets intended to remove impurities and to maintain product quality.
Impurities
Packaging
water, moisture
desiccant (silica gel, other)
oxygen
vacuum, oxygen scavenger, oxygen free inert gas
impurities
sorbent
odor
sorbent, with or without a scent to mask an offensive odor
The packaging should be completely sealed to maintain the local environment.
Temperature control may be another means of preserving and maintaining the formulation.
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Specialty: Pharmacology, clinical