Melarsomine
905 adverse event reports submitted to the FDA
Important: Adverse event reports do not establish that a drug caused or contributed to the event. Consult your veterinarian before making treatment decisions.
905
Total Reports
32
Deaths Reported
350.0%
Death Rate
Active Ingredients
Melarsomine
Administration Routes
IntramuscularUnknownParenteralOralOtherSubcutaneousIntravenous
Species Affected
Dog 877
Unknown 26
Cat 2
Most Affected Breeds
Retriever - Labrador 139
Crossbred Canine/dog 105
Dog (unknown) 58
Dog (other) 56
Beagle 50
Pit Bull 42
Shepherd Dog - German 42
Unknown 32
Chihuahua 27
Boxer (German Boxer) 18
Most Reported Reactions
Lack of efficacy (endoparasite) - heartworm 339
INEFFECTIVE, HEARTWORM LARVAE 240
INEFFECTIVE, HEARTWORM ADULTS 208
Cardiac disorder NOS 99
Lack of efficacy - NOS 86
Vomiting 61
Lethargy (see also Central nervous system depression in 'Neurological') 54
Other abnormal test result NOS 50
Injection site pain 42
Elevated alanine aminotransferase (ALT) 29
Panting 29
Diarrhoea 28
Outcome Breakdown
Outcome Unknown
579 (65.7%)
Ongoing
101 (11.5%)
Recovered/Normal
93 (10.6%)
Recovered with Sequela
75 (8.5%)
Died
18 (2.0%)
Euthanized
15 (1.7%)
Source: FDA Center for Veterinary Medicine — Adverse Event Reports. Data reflects voluntary submissions and may not represent actual incidence rates.