Adrenaline, also known as epinephrine, is a hormone and medication used primarily to treat severe allergic reactions (anaphylaxis), asthma attacks, and cardiac arrest. It binds to adrenergic receptors, which trigger the body’s "fight or flight" response. However, its use has contraindications, such as in patients with certain heart conditions. Adrenaline may also cause drug interactions with beta-blockers, MAO inhibitors, and other medications. Common adverse effects include increased heart rate, anxiety, and tremors. Users of adrenaline must be aware of these risks, and healthcare providers should carefully evaluate the patient's condition before administering the drug.
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