Description

        Indicated to provide thyroid replacement therapy in all conditions of inadequate production of thyroid hormones.

Generic Name

        levothyroxine (leave-oh-thigh-rock'-seen)

What is this Medication used for?

        Levothyroxine is a synthetic thyroid hormone used in the treatment of hypothyroidism.

What are the side effects?

        If given at the proper dose as determined by blood tests there should be no side effects.  Overdose will result in the symptoms of thyrotoxicosis which may include increased thirst, urination and hunger, hyperactivity, personality change, and reduced heat tolerance.

What special Precautions are there?

        This medication should not be used in animals allergic to it.  Do not use in animals with untreated adrenal insufficiency (Addison's disease), use with caution in animals with high blood pressure.   Use with caution when given with warfarin, theophylline, digoxin, phenytoin and barbiturates.  Give 1 hour before or 4 hours after vitamin/mineral combinations containing iron or calcium.  Always tell your veterinarian and pharmacist what other medications your pet is taking.  There can be differences in the action of levothyroxine when changing brands.  As a result, it may be necessary to retest T4 levels when switching brands.

In the event of an overdose.

        Contact your veterinarian or veterinary emergency room.  Symptoms of overdose may include increase thirst, urination and hunger, hyperactivity, personality change, and reduced heat tolerance.

How should I store this medication?

        Keep this medication in the container it came in, tightly closed.  Store tablets at room temperature, away from excess heat, light and moisture.  Do not store in the bathroom.  Throw away any medication that is outdated or no longer needed.  Keep out of the reach of children and pets.

        This information is for educational purposes only and is intended to be a supplement to, and not a substitute for, the expertise and professional judgment of your veterinarian.  The information is NOT to be used for diagnosis or treatment of your pet.  You should always consult your own veterinarian for specific advise concerning the treatment of your pet.

        The information is not intended to cover all possible uses, directions, precautions, warnings, allergic reactions, drug interactions or adverse effects, nor should it be construed to indicate that use of a particular drug is safe, appropriate or effective for your pet.  It is not a substitute for a veterinary exam, and it does not replace the need for service provided by your veterinarian.

You may request a refill of your pet's prescription; however, submitting this form does not guarantee that the medicine will be refilled.  All refills are reviewed by a doctor before being filled.  If there is an issue, one of our staff members will contact you.  When your prescription is ready for pick up we will contact you at your preferred method of contact.

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Last modified: 05/03/07