Which type of agent is typically used when a mild allergic reaction occurs?

Antihistamines are commonly used to manage mild allergic reactions because they work by blocking the action of histamine, a substance in the body that causes many allergic symptoms. When an individual experiences a mild allergic reaction, such as sneezing, itching, or hives, antihistamines can effectively alleviate these symptoms by preventing histamine from binding to its receptors in tissues. This results in reduced inflammation and relief from allergic symptoms.

Corticosteroids and systemic steroids are typically reserved for more severe or persistent allergic reactions due to their potent anti-inflammatory effects and the potential for significant side effects with long-term use. Epinephrine is specifically indicated for severe allergic reactions, such as anaphylaxis, and is not suitable for mild allergic reactions due to its strong effects on the cardiovascular system and need for careful administration. Thus, antihistamines are the appropriate choice for managing mild allergic reactions, providing symptomatic relief without the risks associated with the other types of agents.