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A thermometer or snowflake marking a medicine's required storage conditions.
Also known as: Storage condition symbol, Do not refrigerate symbol, Temperature limit mark
Medicine packaging carries storage markings — a thermometer with a figure, a snowflake, a struck-through sun — stating the conditions the product must be kept in for its stated shelf life. They are not advisory: a medicine stored outside its range may lose potency without any visible change, which is why the guidance is to return a heat-exposed product to a pharmacy rather than to judge it by eye. Refrigerated products carry a narrow range that excludes freezing as well as warmth.
Matters because a medicine stored outside its range can lose potency with no visible change, which is why the advice is to take a heat-exposed product to a pharmacy rather than to judge it by appearance.
Contexts: Medicine
A narrow vertical tube with a bulb at its base drawn beside a figure and a degree mark, or a six-pointed star of fine lines.
Both are storage instructions on a medicine carton.