A common example of an antihistamine is: A) acetaminophen. B) Tegretol. C) Coumadin. D) Benadryl.

## Step 1<br />Antihistamines are a type of medication that are used to treat conditions such as allergies, hives, and the common cold. They work by blocking the effects of histamine, a substance in the body that causes allergic symptoms.<br />## Step 2<br />Among the options provided, Benadryl is a common example of an antihistamine. It is also known as diphenhydramine, and it is used to relieve symptoms of allergy, hay fever, and the common cold.<br />## Step 3<br />The other options, acetaminophen, Tegretol, and Coumadin, are not antihistamines. Acetaminophen is a pain reliever and a fever reducer. Tegretol is an anticonvulsant used to control seizures. Coumadin is a blood thinner used to prevent blood clots.