Aside from possible sedation, what other common side effect should individuals be counselled about in their use of 'classic' antihistamines?

Name: Aside from possible sedation, what other common side effect should individuals be counselled about in their use of 'classic' antihistamines?
Brand: Quizplus
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Question

Quizplus · Accepted Answer

Classic antihistamines such as diphenhydramine can cause sedation as well as urinary retention, gastrointestinal upset, and dry mouth. Therefore, individuals should be counselled about these common side effects.

Aside from Possible Sedation, What Other Common Side Effect Should