Assume the recommended single dose of an antihistamine for a child weighing 48-59 lbs is 2.00 teaspoons (tsp) If 1.00 tsp contains 12.5 mg per 5 ml of the active ingredient in the antihistamine how many milligrams of actiive ingredient does the recommended does for a child weighing 48-59Ibs contain? assume that 1.00 tsp =5ml Active ingredient:mg