Heartgard For Puppies Side Effects. O tremors o dilated pupils o loss of body weight o death to minimize adverse effects, administer exactly as directed by your veterinarian; Heartgard® is safe to use in pregnant and lactating pets.
Heartgard has shown a wide margin of safety at the recommended dose level in dogs (see precautions for exceptions) including pregnant or breeding bitches, stud dogs and puppies aged 6 or more weeks. Dogs and cats that take the medication can become anxious, agitated or depressed. Side effects for the treatment injections, particularly melarsomine and thiacetarsamide, can be nasty, including diarrhea, vomiting, loss of appetite and jaundice.
