Thiamazole
623 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.
623
Total Reports
52
Deaths Reported
830.0%
Death Rate
Active Ingredients
Thiamazole
Administration Routes
OralUnknownTransdermalTopicalOtherAuricular (Otic)Intradermal
Species Affected
Cat 565
Unknown 38
Human 18
Dog 2
Most Affected Breeds
Domestic Shorthair 372
Cat (unknown) 73
Domestic Longhair 64
Unknown 56
Siamese 17
Maine Coon 11
Ragdoll 8
Russian 4
Cat (other) 4
Burmese 2
Most Reported Reactions
Vomiting 142
Weight loss 108
Lethargy (see also Central nervous system depression in 'Neurological') 69
Elevated alanine aminotransferase (ALT) 66
Lack of efficacy - NOS 49
Anorexia 47
Decreased appetite 45
Other abnormal test result NOS 37
Excoriation 35
Elevated blood urea nitrogen (BUN) 35
Low thyroxine (T4) 32
Pruritus 31
Outcome Breakdown
Outcome Unknown
332 (56.5%)
Recovered/Normal
163 (27.7%)
Ongoing
39 (6.6%)
Died
28 (4.8%)
Euthanized
24 (4.1%)
Recovered with Sequela
2 (0.3%)
Source: FDA Center for Veterinary Medicine — Adverse Event Reports. Data reflects voluntary submissions and may not represent actual incidence rates.