Antihistamine and Benadryl

Antihistamine noun - A medicine used to treat allergies and hypersensitive reactions and colds; works by counteracting the effects of histamine on a receptor site.

Benadryl and antihistamine are semantically related. In some cases you can replace term "Benadryl" with "Antihistamine", this nouns are similar.

Benadryl noun - Antihistamine (trade name Benadryl) used to treat allergic reactions involving the nasal passages (hay fever) and also to treat motion sickness.

Antihistamine and Benadryl are semantically related. You can use "Antihistamine" instead a noun "Benadryl".