What is the primary purpose of cimetidine, digoxin, and diphenhydramine in the elderly?

The primary purpose of cimetidine, digoxin, and diphenhydramine in the elderly is primarily related to their individual therapeutic uses, rather than one blanket category. However, focusing on diphenhydramine, its main application is to manage allergies, as it is an antihistamine that alleviates allergic symptoms such as sneezing, runny nose, and itching.

Cimetidine is an H2 blocker commonly used to reduce stomach acid, and while it can have roles in managing conditions related to gastritis or peptic ulcers, it does not directly address allergy symptoms. Likewise, digoxin is primarily utilized to affect heart rhythm, particularly in cases of heart failure or atrial fibrillation, rather than for managing allergies.

Due to the frequent occurrence of allergic reactions and the need for symptom relief in the elderly population, diphenhydramine stands out as the most relevant medication for allergy management in this context. Thus, focusing on its role helps clarify the primary purpose of the listed medications.