Drug Allergies in Dogs

By Moira Clune

Instructions

Vaccine Reactions

Step 1:
The most common allergic reaction to canine vaccines is swelling or hives at the injection site. Occasionally, the site will ulcerate, but most vaccine-site allergies resolve themselves within days of the injection.

Concerns surrounding the over-vaccination of dogs have led many states to change the yearly rabies vaccine to a three-year vaccine. The rabies vaccine is "...the vaccine most associated with adverse reactions because it's so potent," says veterinarian Dr. Jean Dodds. Side effects include seizures, autoimmune disorders and death.

Antibiotic Reactions

Step 1:
Red skin, blisters and skin ulcers can occur at the site of an antibiotic injection. Sometimes the underlying muscle can be affected and inflammation will cause a large lump under the skin. All of these reactions should be monitored for signs of infection and treated accordingly.

Pain Relievers

Step 1:
In the past, arthritis and surgical pain in dogs were largely ignored. With the advent of NSAID pain relievers, dogs have been able to live more comfortably. But NSAIDs come with a price: side effects that include vomiting, loss of appetite, lethargy and diarrhea. In some cases, ulcers, perforations and liver and kidney problems can occur.

The FDA recommends that dog owners read and follow label directions carefully to avoid adverse reactions.

Heartworm-Control Products

Step 1:
ProHeart 6, a convenient but dangerous heartworm-preventative injection, was recalled by the FDA in September 2004. Despite concerns from a U.S. Senator and two U.S. Representatives, ProHeart 6 was re-released in 2008. Mild symptoms include swelling and vomiting, but neurological problems, seizures and death are listed on the company's letter to veterinarians.

Flea-Control Products

Step 1:
Oral and topical flea-control preventatives can cause allergic reactions in dogs that include seizures and fluid accumulation in the lungs. The active ingredients in some of these products are known carcinogens and can cause redness, scaling skin and ulcerations.

Herbal Products

Step 1:
Natural products can cause allergic reactions in dogs. Tea tree oil and pennyroyal oil are found in many flea shampoos, and these oils can cause red, itchy skin in sensitive dogs. Citrus oils, too can cause skin reactions, and these products should never be used on cats.

Know the Signs and Symptoms

Step 1:
The symptoms of drug allergies in dogs can be missed, ignored or misdiagnosed. Know the signs and symptoms of an adverse drug reaction and watch your dog carefully after administering any drug.

Resources

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