Find Information About:

Drugs & Supplements

Get information and reviews on prescription drugs, over-the-counter medications, vitamins, and supplements. Search by name or medical condition.

Pill Identifier

Pill Identifier

Having trouble identifying your pills?

Enter the shape, color, or imprint of your prescription or OTC drug. Our pill identification tool will display pictures that you can compare to your pill.

Get Started
My Medicine

My Medicine

Save your medicine, check interactions, sign up for FDA alerts, create family profiles and more.

Get Started

WebMD Health Experts and Community

Talk to health experts and other people like you in WebMD's Communities. It's a safe forum where you can create or participate in support groups and discussions about health topics that interest you.

  • Second Opinion

    Second Opinion

    Read expert perspectives on popular health topics.

  • Community


    Connect with people like you, and get expert guidance on living a healthy life.

Got a health question? Get answers provided by leading organizations, doctors, and experts.

Get Answers

Sign up to receive WebMD's award-winning content delivered to your inbox.

Sign Up

Thyroid in Dogs
Rmagoon posted:
Hi, I have a 8 year old Lab and he was diagnosed with Thyroid when he was 4 years old. He has been taking Thyroxine ever since then. His dosage is 1 tablet every morning and the strength is 100mg. The issue I am having is that despite him being on medication he has been gaining weight and weighs 49 Kilos now. His vet has asked me to stop his medication for a 3 week period so she can do full tests again. Do you recommend that I stop medication for 3 weeks.
rohvannyn responded:
I'm guessing you mean 100 mcg, rather than mg, if he is on levothyroxine... if your vet says to keep him off it for 3 weeks then I'd trust the vet. I know that levels need to be tested periodically because synthetic thyroid hormone needs can change and often needs to be adjusted. If he is getting too much or too little, it can cause the problems you describe, and more. I know people need their thyroid hormone levels checked quite frequently whether they have hyperthyroidism or hypothyroidism, so it must be the same for dogs.


William Draper, DVM, better known as "Dr. Will," is a well-known small animal practitioner in the Atlanta, GA area. He grew up in Inglewood,...More

Helpful Tips

Helping Hospice Patients Keep Their PetsExpert
Pets are an extremely important part of our lives. And this is especially true when we are at the end of our days. What could be more ... More
Was this Helpful?
35 of 47 found this helpful

Report Problems With Your Medications to the FDA

FDAYou are encouraged to report negative side effects of prescription drugs to the FDA. Visit the FDA MedWatch website or call 1-800-FDA-1088.

Learn more about the AVMA

WebMD Special Sections