Levothyroxine Sodium, Usp
158 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.
158
Total Reports
3
Deaths Reported
190.0%
Death Rate
Active Ingredients
Levothyroxine Sodium, Usp
Administration Routes
OralUnknown
Species Affected
Dog 144
Unknown 9
Human 4
Cat 1
Most Affected Breeds
Mixed (Dog) 31
Unknown 17
Retriever - Golden 13
Retriever - Labrador 8
Siberian Husky 6
Beagle 6
Spitz - German Pomeranian 5
Doberman Pinscher 5
Chihuahua 5
Poodle - Miniature 4
Most Reported Reactions
Itching 23
Vomiting 20
Elevated thyroxine (T4) 19
Diarrhoea 14
Frequent urination 13
Low thyroxine (T4) 11
Lack of efficacy - NOS 11
Panting 11
Drinking a lot 11
Accidental exposure 9
Itchy skin 9
Lethargy (see also Central nervous system depression in Neurological) 9
Outcome Breakdown
Outcome Unknown
71 (47.7%)
Recovered/Normal
56 (37.6%)
Ongoing
16 (10.7%)
Died
3 (2.0%)
Recovered with Sequela
3 (2.0%)
Source: FDA Center for Veterinary Medicine — Adverse Event Reports. Data reflects voluntary submissions and may not represent actual incidence rates.