Thyro Tabs (Levothyroxine Sodium) for Dogs, 0.8 mg

Synthetic T4 Hormone Replacement Tablet for Hypothyroid Dogs

Product Description

Thyro-Tabs Canine (Levothyroxine Sodium Tablets, USP) 0.8 mg is an FDA-approved prescription thyroid hormone replacement for dogs, supplied in bottles of 120 or 1,000 blue oval scored tablets. Each tablet contains 0.8 mg levothyroxine sodium — a synthetic form of T4 bioidentical to the hormone the canine thyroid naturally produces. Indicated for managing hypothyroidism in dogs, it restores normal metabolic function by supplementing deficient circulating thyroid hormone levels through consistent daily oral dosing.

Benefits

• Restores Normal Metabolism: Corrects low thyroid hormone levels in hypothyroid dogs, helping to normalize metabolic function with consistent daily dosing.
• Clinically Proven Success Rate: In a US field study, 75.6% of evaluable dogs achieved treatment success with TT4, fT4, and TSH normalized at Day 182.
• Resolves Hypothyroid Signs: Weight gain, lethargy, alopecia, seborrhea, hyperpigmentation, and elevated cholesterol generally improved throughout the field study period.
• Bioidentical T4 Formula: The levothyroxine sodium in Thyro-Tabs Canine is structurally identical to the thyroid hormone a healthy canine thyroid gland produces naturally.
• Scored for Dose Adjustment: The 0.8 mg blue tablet is scored to allow splitting, giving the prescribing vet flexibility when fine-tuning the maintenance dose.
• Human-Grade Manufacturing: Thyro-Tabs Canine is produced under the same FDA manufacturing standards as the human levothyroxine formulation, in the same facilities.

Ingredients

Active Ingredients

Levothyroxine Sodium (Anhydrous): 0.8 mg per tablet

How to Use

Dosage and Administration Instructions

• Prescription Required: Federal (USA) law restricts Thyro-Tabs Canine to use by or on the order of a licensed veterinarian only.
• Starting Dose: Begin at 0.1 mg per 10 lbs (0.01 mg/lb; 0.022 mg/kg) body weight once every 24 hours, or as a divided dose every 12 hours.
• Dose Monitoring Schedule: Serum TT4 should be rechecked 4 to 6 hours after the tablet alongside clinical signs every 4 to 8 weeks until the dog is stable.
• Food Timing Consistency: Stick to the same routine every day, either always with food or always without, as switching back and forth sends TT4 levels in unpredictable directions.
• Reduced Bioavailability with Food: Levothyroxine absorption in dogs sits at just 10 to 20 percent fasted; food at dosing time lowers it further.
• Formulation Switching Caution: Switching from another levothyroxine brand means TT4 levels and clinical response need rechecking, as absorption can differ.
• Lifelong Therapy Expected: Canine hypothyroidism is a lifelong condition; do not stop Thyro-Tabs without first consulting the prescribing veterinarian.

Disclaimer: This dosage information is provided by the manufacturer. Always consult your veterinarian before administering or adjusting any supplement for your pet.

Additional Information

Precautions

• Thyrotoxicosis Contraindication: Do not give Thyro-Tabs to any dog already diagnosed with thyrotoxicosis or uncorrected adrenal insufficiency.
• Heart Disease Monitoring: Dogs with concurrent cardiac disease starting thyroid replacement need careful monitoring during the dose-establishment phase.
• Concurrent Cardiac Medication: Both levothyroxine dose and any cardiac drug may need adjustment based on clinical response in dogs with heart conditions.
• Breeding and Pregnant Dogs: Safety in breeding, pregnant, or lactating dogs has not been evaluated; always seek veterinary guidance before use in these animals.
• Drug Interactions to Report: Antacids, corticosteroids, insulin, and anticonvulsants may each affect levothyroxine absorption or effectiveness; tell the vet about all current medications.
• Secure from All Pets: Dogs, cats, and other household animals must never have access to this thyroid supplement, as accidental consumption can cause serious harm.

Possible Side Effects

• Pruritus (Itching): Itching is the most frequently reported adverse event in dogs on Thyro-Tabs Canine per post-approval adverse drug experience data.
• T4 Level Imbalances: Both elevated and low serum T4 concentrations are commonly reported; regular post-dose bloodwork is essential to detect and correct these early.
• Elevated Liver Enzymes: Increases in ALP, ALT, or AST were seen in 3 field study dogs; two resolved by Day 70 and Day 126 without discontinuing therapy.
• Gastrointestinal Signs: Vomiting, diarrhea, and reduced appetite have been reported in both field study participants and post-approval adverse experience submissions.
• Increased Thirst and Urination: Polydipsia and polyuria have appeared in both field study results and post-approval reports; bring these to the vet's attention promptly.
• Skin and Coat Changes: Alopecia, dermatitis, seborrhea, and allergic reactions including hives or facial swelling have been noted in post-approval adverse event experience.

Storage Information

• Room Temperature Storage: Store at 20-25°C (68-77°F); brief excursions between 15-30°C (59-86°F) are permitted without affecting tablet potency or stability.
• Protect from Light and Moisture: Keep the bottle away from direct light and humidity to maintain the stability of the levothyroxine sodium tablets throughout their shelf life.

Shipping & Return

We offer ground, express, and priority delivery; see our shipping policy for details.

For return instructions or product concerns, please refer to our detailed refund policy.

Prescription items are NON-RETURNABLE and NON-REFUNDABLE.

Frequently Asked Questions

Q1: What is Thyro-Tabs Canine 0.8 mg levothyroxine used for in dogs?

Ans: Thyro-Tabs Canine 0.8 mg is an FDA-approved prescription T4 replacement tablet for dogs diagnosed with hypothyroidism. It supplements low circulating thyroid hormone levels to restore normal metabolism, helping resolve signs like lethargy, weight gain, and poor coat condition.

Q2: How does the Thyro-Tabs 0.8 mg blue tablet differ from other strengths?

Ans: All Thyro-Tabs Canine strengths contain the same active ingredient, levothyroxine sodium, and share the same FDA-approved indication. The 0.8 mg blue tablet is one of the higher strengths, suited to larger dogs or those whose bloodwork shows a need for a more robust daily T4 dose than lower strengths provide.

Q3: Why does food timing matter so much when giving a dog levothyroxine sodium tablets?

Ans: Dogs only absorb around 10 to 20 percent of levothyroxine orally even on an empty stomach, and having food in the stomach at the same time brings that figure down even further. Switching back and forth between giving the tablet with food one day and without it the next throws serum T4 levels around, which makes it genuinely difficult for the vet to land on a dose that works consistently.

Q4: Is Thyro-Tabs dog thyroid supplement safe for dogs with heart disease?

Ans: Thyro-Tabs Canine can be given to dogs with heart disease, but the early phase of finding the right dose needs careful watching. Bringing thyroid hormone levels up speeds the metabolism, and that added demand can put extra pressure on a heart that is already compromised. As things settle, both the levothyroxine dose and any medications the dog takes for their heart may need to be tweaked along the way.

Q5: How long will my dog need to take Thyro-Tabs levothyroxine 0.8 mg tablets?

Ans: Hypothyroidism in dogs is a condition that does not go away, so most dogs stay on Thyro-Tabs for the rest of their lives. Coming off the medication without a vet's say-so tends to bring all the original symptoms back fairly quickly. Staying on top of things with regular blood tests and vet visits helps make sure the dose keeps doing its job as the dog gets older.

Clinical Research

https://www.msdvetmanual.com/endocrine-system/the-thyroid-gland/hypothyroidism-in-animals

https://www.petmd.com/dog/conditions/endocrine/c_dg_hypothyroidism

https://dailymed.nlm.nih.gov/dailymed/fda/fdaDrugXsl.cfm?setid=38005382-289a-4293-b58e-b1cda8bc228