Hypothyroidism Hormone Replacement Therapy

Soloxine is a prescription medication for dogs suffering from an underperforming thyroid, or hypothyroidism. Sometimes Soloxine pet meds can be used in cats that have had their thyroid removed. By using a synthetic version of the hormone levothyroxine, Soloxine can treat loss of stamina, lethargy, fatigue, decelerated heart rate, low body temperature, weight gain, and other symptoms caused by hypothyroidism. Available in tablet form and various strengths for easy dosing.

Soloxine is a prescription medication for use in dogs with an underperforming thyroid, a condition known as hypothyroidism. Additionally, it is sometimes used in cats that have had their thyroid removed. This medication is a synthetic version of the hormone levothyroxine. Soloxine for dogs serves as a replacement therapy for this hormone.

Benefits of Soloxine:

  • Replaces levothyroxine when the thyroid is not producing enough
  • Effective treatment for dogs with hypothyroidism and cats without a thyroid gland
  • Sold in a number of concentrations for dosing convenience
  • Normalizes biological functions hindered by levothyroxine insufficiency
  • Easily administered orally by hand
  • Approved by the FDA for dogs, commonly prescribed off-label for cats
  • Treats hypothyroidism
  • Improves your pet's health and quality of life with levothyroxine replacement therapy
  • Shows results in a matter of weeks

Soloxine is only for dogs with hypothyroidism. It is also used in certain circumstances in cats that have no thyroid gland. Not for human use. Not for other animals.

Keep out of reach of children. Do not allow children to administer Soloxine. Read directions and precautionary statements before use.

Use as prescribed by your veterinarian.


    1. Give your pet Soloxine 30 minutes before feeding, unless your veterinarian advises you to administer this medication by adding it to food.
    2. Feed the prescribed dose--typically starting at 0.1 mg per 10 lbs. of body weight--twice a day to your dog.
    3. Feed the prescribed dose--typically starting at 0.05-0.1 mg--once daily to your cat.
    4. Provide your pet with plenty of water.

Note that some dogs are only dosed once per day, and that your veterinarian will recalculate dosage periodically after performing blood tests to measure levothyroxine levels. Follow your veterinarian's prescription.

Frequency of Use:

Dogs are usually given Soloxine twice a day, and cats are usually given the medication once a day. Soloxine is generally taken for life.


Store in original container and out of reach of children and animals.

Store between 59 and 86 degrees F, away from moisture and heat.

It is a violation of Federal Law to use this product in a manner inconsistent with its labeling.

Soloxine is sold in 250 and 1,000 count bottles of 0.1 mg, 0.2 mg, 0.3 mg, 0.4 mg, 0.5 mg, 0.6 mg, 0.7 mg, 0.8, and 1.0 mg.


Keep this product out of reach of children and animals. Do not use or store in or near open flame or heat.

Soloxine is only for dogs and, in some instances, cats. Do not give to other animals. Do not give to any animal that does not have a prescription for Soloxine. Not for human consumption.

Follow the package and prescription instructions carefully.

All animals react differently to levothyroxine replacement therapy. Your veterinarian will need to periodically test your pet's blood.

CAUTION: Soloxine is contraindicated in animals with hyperthyroidism, acute myocardial infarction, thyrotoxicosis, and uncorrected adrenal insufficiency.

The safety of Soloxine in pregnant animals is not known.

Use with extreme caution in older or debilitated animals, and in those with hypertension, diabetes, heart disease, or Addison's disease.

Soloxine is not associated with side effects at the proper dose. An overdose may present with fever, sleep disturbances, personality or behavior changes, increased appetite, excessive thirst and/or urine output, weight changes, or other effects. Contact your veterinarian right away if you suspect an overdose.

Allergic reactions to Soloxine are possible. Common signs include itching, hives, rash, facial swelling, closing of the throat, and difficulty breathing. Seek emergency veterinary care.

Tell your veterinarian if your pet takes an antidepressant or any other drugs or supplements. Discuss giving your pet any new supplements or medications beforehand.

If your pet takes sucralfate or an aluminum antacid, administer it either 4 hours before or after Soloxine doses.

Warranty and Manufacturer Information:


Virbac AH, Inc., Fort Worth, TX 76137

For More Information Call 1-800-338-3659

NAC No.: 10230791

Customer ServiceFree Shipping

The VetDepot Difference