Additional Information

Description

Diphenhydramine 50 mg/mL is an antihistamine primarily used for the relief of allergic reactions, including symptoms such as itching, hives, and rashes. It functions as an antagonist to histamine receptors, particularly the H1 receptors, which are responsible for allergic responses in the body. This medication is commonly used in emergency situations for acute allergic reactions, including anaphylaxis, and is also indicated for the treatment of motion sickness and as a short-term sleep aid.

The medication works by blocking the effects of histamine, which is released during allergic responses and triggers symptoms such as swelling, redness, and itching. By preventing histamine from binding to its receptors, diphenhydramine reduces these symptoms and provides relief to patients suffering from allergic reactions. It has mild sedative properties, which contribute to its use in the management of insomnia or anxiety-related conditions.

Adverse effects of diphenhydramine include drowsiness, dizziness, dry mouth, blurred vision, and urinary retention, particularly in older adults. Due to its sedative effects, it should be used cautiously in combination with other CNS depressants. The injection form is typically used when rapid relief is needed, as it allows for faster absorption and action compared to oral preparations.