How Much Benadryl do I Give my Child?

Benadryl is not recommended for children under the age of two. The dosage depends on the child’s weight. A child that weighs 17 to 21 pounds gets 3/4 tsp, 22 to 32 pounds gets 1 tsp, 33 to 42 pounds get 1 1/2 tsp and so on. The bottle tells all this information.