The exact dosage and schedule of administration is not yet established and pets that are being treated with flea antigen injections have to be monitored for reactions or overdose. (vetinfo.com)
The side effects of flea antigen injections are rare. (vetinfo.com)
However cats suffering from underlying conditions such as mange, bacterial pyoderma and yeast dermatitis may not benefit with flea antigen injections. (vetinfo.com)