Benadryl

• Benadryl,also known as Diphenhydramine, is an effective antihistamine that will reduce swelling and itchiness associated with allergies. Even though Benadryl is found over-the-counter, it should not be administered without consulting with a vet first.
  
  

Chlor-Trimeton

• Chlor-trimeton also known as Chlorpheniramine, is another over-the-counter antihistamine that may help treat allergies and allergic reactions. As with Benadryl, it should only be given under the strict guidance of a veterinarian.
  
  

Atarax

• Atarax, also known as Hydroxyzine, is a prescription medication that blocks the production of antihistamine. It is effective in treating atopy, dermatitis and allergy symptoms.
  
  

Steroids

• In bad cases of allergies, or when quick relief is needed, steroids in the form of pills or injections may be helpful. These can often be combined with antihistamines. However, the list of side effects deriving from their use can be lengthy.
  
  

Allergy Shots

• If the source of the allergy can be identified, dogs may benefit from allergy shots. In this case, a process known as hyposensitation takes place, in which the dog's immune system should become less and less reactive to the allergen as time goes by.
  
  

Considerations

• In some cases, a combination of medications may be the winning strategy.Image by Flickr.com, courtesy of Robert S. Donovan
  
  At times, a combination of medications may be the winning strategy in dogs affected by severe allergies. This may mean the use of steroids, antihistamines and the addition of fatty acid supplements.