Answer to Question 1
ANS: A, B, C, D
Antihistamines reduce the symptoms of nasal itching, sneezing, rhinorrhea, lacrimation, and conjunctival itching through local and systemic actions. Antihistamines are H1 antagonists or blockers, may be administered orally, are distributed systemically, and do not reduce nasal congestion.
Answer to Question 2
ANS: B, C, D
All histamines cause anticholinergic adverse effects such as dry mouth, constipation, and urinary retention. Therefore, fluids and fiber should be increased in the diet when taking antihistamines. It is important to seek approval from the health care provider if currently using other scheduled medications with antihistamines. Blurred vision is an adverse effect of antihistamine use; patients should be urged to use caution because their cognitive and sensory abilities are impaired. Because of the sedative effect of most antihistamines, patients feel a decrease in energy. OTC medications must be approved by the health care provider to prevent drug interactions.