Medication/adult dose	Cost*
Antihistamines †
Cetirizine (Zyrtec) 10 mg orally once per day	$2.33 per day
Diphenhydramine (Benadryl) 25 to 50 mg orally every four to six hours	$0.16 to $0.24 (generic) or $0.69 to $1.05 (brand) per day
Fexofenadine (Allegra) 60 mg orally twice per day	$3.45 per day
Hydroxyzine (Atarax) 25 to 100 mg orally at bedtime as needed	$0.60 to $2.93 per day
Loratadine (Claritin) 10 mg orally once per day	$1.02 per day