The Food and Drug Administration announced June 5 the limited reintroduction of ProHeart 6 to the U.S. veterinary market. The injectable canine heartworm medication had been voluntarily recalled in 2004 after the FDA Center for Veterinary Medicine raised serious questions about the drug’s safety.

The agency said it is allowing the drug’s limited return to the veterinary market as part of a risk minimization and restricted distribution program designed to manage the re-introduction of ProHeart 6 to provide for safe, appropriate use of the product while minimizing risk to dogs.

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