Although most dogs either have had or will have fleas at some point during their life, allergic reactions to flea medicines are rare. Dogs can enjoy flea-free lives if flea medications are used properly.
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Sensitivity
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A dog should be carefully watched after application of flea control medication. Signs of sensitivity include continued scratching and biting, increased activity and increased water intake.
Overdose
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Using the incorrect medication or overdosing can cause an allergic reaction. These reactions typically include staggering, stiff joints, runny eyes and excess panting.
Undermedication
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Undermedication can result in continuation of the signs of the original flea allergy. These symptoms include scratching, biting, crusty skin, and hair loss.
Other Pets
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With use of topical medication, it is very important that other animals not lick the dog's neck until the medication is dry. Ingesting liquid flea medication can cause severe allergic reactions including nausea, diarrhea, dizziness and lethargy.
Treatment
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Treatment for topically applied flea medication allergies includes bathing the dog with mild soap and water and keeping the animal quiet and under surveillance until the reaction subsides. Continued allergy symptoms require treatment by a veterinarian.
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