🐕 Dogs · Veterinary Condition
Hypothyroidism in Dogs
Canine hypothyroidism affects ~0.2% of dogs, predominantly middle-aged large breeds. Diagnosis: TT4 + fT4 + TSH. Treatment is lifelong levothyroxine replacement.
Symptoms to watch for
- •Weight gain without increased appetite
- •Lethargy, exercise intolerance
- •Bilateral truncal alopecia
- •Cold intolerance
- •Recurrent skin/ear infections
- •Bradycardia
Treatment options
LevothyroxineFirst-line
BID starting dose, then titrate to TT4 target. Compounded liquid for precise small-breed dosing.
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FAQs — Hypothyroidism in Dogs
What is the best medication for hypothyroidism in dogs?
The first-line medications for hypothyroidism in dogs are: levothyroxine. Treatment selection depends on disease severity, concurrent conditions, and individual patient response. Always confirm dosing with your veterinarian.
What are the symptoms of hypothyroidism in dogs?
Common symptoms include: Weight gain without increased appetite; Lethargy, exercise intolerance; Bilateral truncal alopecia; Cold intolerance. Any persistent or worsening symptoms warrant veterinary evaluation.
How is hypothyroidism diagnosed?
Canine hypothyroidism affects ~0.2% of dogs, predominantly middle-aged large breeds. Diagnosis: TT4 + fT4 + TSH. Treatment is lifelong levothyroxine replacement.
How much does dog hypothyroidism treatment cost?
Monthly medication cost varies by drug, dog size, and pharmacy. On Script Unlock, verified pharmacies bid competitively for your prescription, typically saving 30-70% vs vet clinic dispensing. Upload your prescription to see real-time pricing.
Sources & review
Reviewed by: ScriptUnlock Pharmacy Verification Team
Last reviewed: June 2026
Sources cited:
- • ACVIM Consensus on Hypothyroidism
- • AAHA Endocrine Guidelines
This information is educational and does not substitute for veterinary advice. Always confirm diagnosis, dosing, and treatment plan with your veterinarian. ScriptUnlock connects pet owners to verified pharmacies; we do not provide veterinary advice.