L-Thyroxine
32 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.
32
Total Reports
7
Deaths Reported
2190.0%
Death Rate
Active Ingredients
L-Thyroxine
Administration Routes
OralUnknown
Species Affected
Dog 32
Most Affected Breeds
Retriever - Labrador 5
Boxer (German Boxer) 3
Shar Pei 3
Beagle 2
Chihuahua 2
Retriever - Golden 2
Collie - Border 1
Spaniel - Cocker American 1
Spaniel - Springer English 1
Dachshund - Miniature 1
Most Reported Reactions
Anorexia 6
Other abnormal test result NOS 5
Vomiting 5
Lethargy (see also Central nervous system depression in 'Neurological') 5
Diarrhoea 4
Lack of efficacy - NOS 4
Weight loss 4
Death 4
Seizure NOS 3
Elevated serum alkaline phosphatase (SAP) 3
Death by euthanasia 3
Hypersalivation 3
Outcome Breakdown
Ongoing
10 (31.3%)
Outcome Unknown
8 (25.0%)
Recovered/Normal
7 (21.9%)
Died
4 (12.5%)
Euthanized
3 (9.4%)
Source: FDA Center for Veterinary Medicine — Adverse Event Reports. Data reflects voluntary submissions and may not represent actual incidence rates.