Loratadine (Claritin)

Photograph of Loratadine (Claritin) under the microscope.

Loratadine is very commonly known as Claritin, an antihistamine that is used to relieve or prevent the symptoms of hay fever and other types of allergies. Antihistamines work by inhibiting the neurotransmitter histamine, which can produce a wide spectrum of allergenic effects including itching, sneezing, runny nose, and watery eyes. Side effects include irregular heartbeat, drowsiness, confusion, dizziness, and dry mouth.

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