Epinephrine auto-injectors may lose potency within hours when stored in a hot vehicle, a new study revealed.

The study, published in The Journal of Allergy and Clinical Immunology, found that short-term exposure to heat in a car on a sunny day can decrease the concentration of epinephrine in auto-injectors.

Patients may be tempted to leave their epinephrine auto-injector in their vehicle while running errands or going out, but the study urges patients to reconsider. If a degraded epinephrine auto-injector is used by patients, it could result in underdosage during anaphylaxis, a potentially life-threatening allergic reaction.


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