What is the most frequent adverse effect of antihistamine use?
A patient is diagnosed with allergic rhinitis. He reports that the medications he has tried have caused drowsiness that interferes with driving. Which of the following is the least sedating antihistamine?
Which antihistamine frequently is used to treat allergy but has minimal sedative properties?
Before starting a patient on an antihistamine such as diphenhydramine, the patient should be warned of which major side effect?
What other drug has similar side effects as diphenhydramine?
Which of the following is a TRUE statement about antihistamines?
Which is a nonsedating antihistamine?
Which of the following classes of medications may cause urinary retention by inhibiting bladder contractibility?
Which drug should be avoided with antihistamines?
In comparing first-generation antihistamines such as diphenhydramine to the newer second-generation drugs such as loratadine, there are differences that are clinically significant at a class level. While both are histamine receptor antagonists, which of the following statements best delineates the differences between these sub-classes?
In which drug category is hydroxyzine?
Which of the following best describes the primary mechanism of action of antihistamine drugs?