adrenalineautoinjector

An adrenaline auto-injector, or epinephrine auto-injector, is a compact device that delivers a fixed dose of epinephrine to treat anaphylaxis, a severe allergic reaction that can be life-threatening. It enables rapid self-administration or bystander use while awaiting urgent medical care. In many countries, they require a prescription and some training for proper use.

Epinephrine acts on alpha and beta-adrenergic receptors, constricting blood vessels, reducing airway swelling, and opening the airways. This helps counteract symptoms such as breathing difficulty, swelling, hives, and low blood pressure. It is a first-aid measure and does not replace professional medical treatment; emergency services should be contacted after use.

Most devices deliver a fixed dose, commonly 0.15 mg or 0.30 mg, with the appropriate dose depending on age and weight and local guidelines. The devices are single-use and must be replaced after activation. Brands vary, but all are designed to deliver quickly into the mid-outer thigh. Follow the device instructions for use; many devices provide indicators to confirm delivery.

Administration and storage: The injection is given intramuscularly into the outer mid-thigh and can be used through clothing. After use, seek immediate medical care, as symptoms can recur and a second dose may be needed if advised by a clinician. Store at room temperature, protect from heat, and replace before expiration.

Safety: Common side effects include rapid heartbeat, tremor, anxiety, dizziness, and pale skin. People with certain heart conditions or those on beta-blockers may have altered responses. Auto-injectors are not substitutes for medical evaluation.