It’s important to understand a medication’s uses and side effects before giving it to your pet. This medication info sheet is meant to give you a good understanding of what DES (diethylstilbestrol) is used for, how it works, and potential side effects in cats and dogs. Always consult a veterinarian before giving your pet any medication.
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Levothyroxine
Thyro-Tabs Canine, Synthroid, Soloxine, Thyrosyn, Levothroid, Levoxyl, Unithroid, Levo-T, Eltroxin, PMS-Levothyroxine
Prescription only
Tablets 0.1mg, Tablets 0.2mg, Tablets 0.3mg, Tablets 0.4mg, Tablets 0.5mg, Tablets 0.6mg, Tablets 0.7mg, Tablets 0.8mg. Chewable tablets and powder forms are also available.
Thyroid medication; Hormone
Levothyroxine is commonly used to treat hypothyroidism in dogs.
Levothyroxine is a hormone supplement. It provides the thyroid hormone that is lacking.
There are typically no side effects when given at the appropriate dosage. However, side effects can be seen with overdosage and include tachycardia (increased heart rate), nervousness, panting, increased appetite, increased thirst, and increased urination. An acute overdosage could result in vomiting, diarrhea, hyperactivity, hypertension (high blood pressure), respiratory difficulty, and changes in pupil size.
Levothyroxine can cause adverse reactions with certain drugs including Atenolol, Enalapril, Omeprazole, and Calcium Carbonate.
Also, medications like iron supplements, sucralfate, antacids, and ciprofloxacin may keep levothyroxine from being absorbed properly by the GI tract and should be avoided. In diabetic patients, levothyroxine may alter insulin requirements.
Levothyroxine should be avoided in patients that have end-stage heart disease or untreated hypoadrenocorticism. It is contraindicated in thyrotoxicosis and should be used cautiously in patients with managed hypoadrenocorticism, cardiac disease, and diabetes.
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