I believe this product was under recall last year... it is now only available on a restricted basis. I wouldn't risk trying this, ever.
From the website:
IMPORTANT SAFETY INFORMATION: Owners should be advised of the potential for adverse reactions, including anaphylaxis, and be informed of the clinical signs associated with drug toxicity including digestive, hematological, or neurological reactions that can occur and may be serious. Owners should be advised to contact their veterinarian immediately if signs of toxicity are observed. The vast majority of patients with drug related adverse reactions have recovered when the signs are recognized and veterinary care, if appropriate, is initiated. ProHeart 6 should not be used in sick, debilitated or underweight animals or animals with a history of weight loss. Use with caution in dogs with pre-existing allergic disease. A small percentage of dogs showed mild, transient swelling or itching at the injection site.
ProHeart 6 is available only through a restricted distribution program. Veterinarians enrolled in this program can receive and administer ProHeart 6. In addition, ProHeart 6 dog owners must be advised of the risks of ProHeart 6 and sign an Owner Consent Form prior to the first administration. To obtain additional information including a copy of the product labeling,
click here or call 1-855-424-7349.
*Ancylostoma caninum and
Uncinaria stenocephala