How Long Does It Take for Allergy Medicine to Work? For lots of people, allergy treatment is reactive. You get stuffed up, your eyes water, and then you go to the medicine cabinet for relief.

Benadryl (diphenhydramine ... used for the treatment of allergies as well as motion sickness and nausea. First-generation H1 antihistamines like Benadryl work differently than second-generation ...

To treat dog allergies, travel jitters ... This sweetener is toxic for dogs. How long does it take for Benadryl to work in dogs? The effects of Benadryl can usually be seen within 30 minutes ...