What are the ingredients in antihistamines?

Antihistamines typically contain active ingredients that block histamine receptors, with common examples being diphenhydramine, loratadine, and cetirizine. They may also include inactive ingredients such as fillers, binders, preservatives, and coloring agents to aid in formulation and stability. Additionally, some antihistamines may contain other compounds to alleviate symptoms, such as decongestants or pain relievers. Always check the specific product label for the complete ingredient list.