Benadryl (diphenhydramine) and Mucinex (guaifenesin) are over-the-counter medications used to address symptoms related to colds, allergies, and respiratory illnesses. Benadryl is an antihistamine used to
Benadryl (diphenhydramine) and Mucinex (guaifenesin) are over-the-counter medications used to address symptoms related to colds, allergies, and respiratory illnesses. Benadryl is an antihistamine used to