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Thyroxine Sodium 50 mg Tablets for Dogs - Effective Treatment for Hypothyroidism
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Home Dog Veterinary Diets Thyrox-50 Levothyroxine Sodium 50 mcg Tablets
Levothyroxine Sodium 25 mg tablets for pets, used for managing hypothyroidism in dogs and cats.
Thyroxine Sodium Tablets 25 mg for Cat $36.50 – $106.50Price range: $36.50 through $106.50
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Thyrox-50 Levothyroxine Sodium 50 mcg Tablets

Rated 4.67 out of 5 based on 3 customer ratings
(3 customer reviews)

$36.50 – $106.50Price range: $36.50 through $106.50

Thyrox-50 Levothyroxine Sodium 50 mcg Tablets – Macleods Pharmaceuticals

Thyrox-50 contains 50 mcg (0.05 mg) of levothyroxine sodium per tablet, a synthetic form of the thyroid hormone T4. Manufactured by Macleods Pharmaceuticals, this prescription medicine is marketed for thyroid hormone replacement in people with hypothyroidism.

Product details:

  • Brand: Thyrox-50
  • Active ingredient: Levothyroxine sodium (thyroxine sodium)
  • Strength: 50 mcg per tablet
  • Manufacturer: Macleods Pharmaceuticals
  • Form: Oral tablets
  • Quantity options: 100, 200 or 300 tablets
  • Prescription required: Yes

Important for pet owners: Thyrox-50 is not established as an FDA-approved veterinary formulation for dogs. Consult your veterinarian about an appropriate, approved canine thyroid medicine and never substitute or adjust thyroid medication without veterinary direction.

Review the product specifications and select your required tablet quantity.

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SKU: N/A Categories: Dog, Pharmacy, Veterinary Diets, Allergy Relief, Skin & Coat
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Description

Thyrox-50 Levothyroxine Sodium 50 mcg Tablets

Thyrox-50 is a prescription thyroid hormone replacement medicine manufactured by Macleods Pharmaceuticals. Each tablet contains 50 mcg of levothyroxine sodium, a synthetic version of thyroxine (T4), the hormone normally produced by the thyroid gland.

Levothyroxine is used in managing hypothyroidism, a condition where the thyroid gland does not produce sufficient thyroid hormone.

Thyrox-50 Product Specifications

Specification Details
Product name Thyrox-50
Generic ingredient Levothyroxine sodium
Also known as Thyroxine sodium
Tablet strength 50 mcg (0.05 mg)
Manufacturer Macleods Pharmaceuticals
Dosage form Oral tablet
Available quantities 100, 200 and 300 tablets
Prescription Required

What Is Levothyroxine Sodium?

Levothyroxine sodium is a synthetic form of the thyroid hormone T4. Thyroid hormones are involved in regulating metabolism, body temperature, energy use and other normal physiological functions.

Levothyroxine replacement therapy is used when the body cannot produce sufficient thyroid hormone. The appropriate dose and formulation depend on the individual patient’s diagnosis, laboratory results and clinical response.

Levothyroxine for Dogs: Important Veterinary Information

Dogs can develop hypothyroidism when their thyroid gland produces insufficient thyroid hormone.

Common signs may include:

  • Reduced energy or unusual tiredness
  • Unexplained weight gain
  • Hair thinning or hair loss
  • Dry or abnormal skin and coat
  • Reduced tolerance to cold temperatures

These symptoms can also occur with other diseases. A veterinarian must confirm the diagnosis through appropriate examination and testing.

In the United States, FDA-approved canine levothyroxine products include Thyro-Tabs Canine and ThyroKare. Veterinary formulations have their own prescribing instructions and monitoring requirements.

Thyrox-50 is a human-market levothyroxine product. It must not be represented as equivalent to an FDA-approved canine formulation or substituted for a prescribed veterinary medicine without professional authorization.

Available Tablet Quantities

MomasPets currently lists three purchase quantities:

  • 100 tablets
  • 200 tablets
  • 300 tablets

Each tablet contains 50 mcg of levothyroxine sodium. Select the required quantity using the product options above. Packaging configuration and prescription verification requirements should be confirmed before fulfillment.

Prescription, Dosage and Monitoring

Levothyroxine is a prescription medicine. The correct dosage depends on the patient and the particular formulation.

For dogs diagnosed with hypothyroidism, a veterinarian determines the appropriate medication and treatment schedule. Thyroid blood tests and clinical monitoring help assess treatment response and the need for dosage adjustments.

Do not calculate a dose using a general online dog-weight table. Do not switch between levothyroxine formulations, split tablets, or change treatment without the prescribing veterinarian’s instructions.

Side Effects and Precautions

Excess thyroid hormone exposure in dogs can cause symptoms including:

  • Restlessness or unusual nervousness
  • Excessive thirst or urination
  • Increased heart rate
  • Panting
  • Vomiting or diarrhea
  • Weight loss despite increased appetite

Contact a veterinarian promptly if these symptoms occur during thyroid treatment.

Particular caution is required for dogs with certain underlying medical conditions, including heart disease or adrenal disorders.

Product Storage and Handling

Store according to the manufacturer’s packaging instructions. Keep tablets in their appropriate container, protected from unsuitable storage conditions and out of reach of children and animals.

Ordering Information

Review the product name, active ingredient, tablet strength and selected quantity before proceeding. Prescription verification and fulfillment remain subject to applicable requirements.

For US orders, MomasPets generally communicates an estimated delivery window of 10–15 days, subject to the order’s eligibility and confirmed shipping arrangements.

 

Reviews (3)

3 reviews for Thyrox-50 Levothyroxine Sodium 50 mcg Tablets

  1. Oscar Hughes – July 3, 2026

    Rated 5 out of 5

    The website made it simple to find and order Thyroxine Sodium Tablets 50 MG for Dog. The product page was clean, direct, and easy to use.

  2. Emily Carter – July 3, 2026

    Rated 4 out of 5

    The product information for Thyroxine Sodium Tablets 50 MG for Dog was presented neatly. It helped me review the basics before buying, and the checkout experience was smooth.

  3. Lauren Reed – July 4, 2026

    Rated 5 out of 5

    The product information for Thyroxine Sodium Tablets 50 MG for Dog was presented neatly. It helped me review the basics before buying, and the checkout experience was smooth.

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FAQs

FAQs

What is Thyrox-50 50 mcg?

Thyrox-50 is a prescription medicine containing 50 micrograms of levothyroxine sodium per tablet. It is manufactured by Macleods Pharmaceuticals and marketed for thyroid hormone replacement.

Is Thyrox-50 the same as Thyro-Tabs Canine?

No. Both contain levothyroxine sodium, but Thyro-Tabs Canine is an FDA-approved veterinary product for dogs. Thyrox-50 is a different branded formulation and should not be treated as an interchangeable veterinary product.

Is 50 mcg the same as 50 mg?

No. 50 mcg equals 0.05 mg. A 50 mg dose is 1,000 times greater than 50 mcg. Always verify the medication label and prescribed strength.

What is levothyroxine used for in dogs?

Veterinarians prescribe appropriate levothyroxine formulations for dogs diagnosed with hypothyroidism. The treatment replaces insufficient thyroid hormone and requires veterinary monitoring.

Can I give my dog Thyrox-50 tablets?

Do not give your dog Thyrox-50 without explicit direction from a licensed veterinarian. The correct veterinary formulation, strength and dose must be established by the veterinarian.

How long does levothyroxine treatment take to work in dogs?

Some dogs receiving appropriate veterinary levothyroxine treatment show improved activity within a few weeks. Skin and coat changes can take several months. Response varies and should be evaluated by the veterinarian.

What quantities are listed by MomasPets?

The product page currently offers 100, 200 and 300 tablet quantity options. Confirm the supplied packaging configuration and prescription requirements before ordering.

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    Thyroxine Sodium 50 mg Tablets for Dogs - Effective Treatment for Hypothyroidism

    Thyrox-50 Levothyroxine Sodium 50 mcg Tablets

    Rated 4.67 out of 5
    $36.50 – $106.50Price range: $36.50 through $106.50 Select options
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