We are independent & ad-supported. We may earn a commission for purchases made through our links.

Advertiser Disclosure

Our website is an independent, advertising-supported platform. We provide our content free of charge to our readers, and to keep it that way, we rely on revenue generated through advertisements and affiliate partnerships. This means that when you click on certain links on our site and make a purchase, we may earn a commission. Learn more.

How We Make Money

We sustain our operations through affiliate commissions and advertising. If you click on an affiliate link and make a purchase, we may receive a commission from the merchant at no additional cost to you. We also display advertisements on our website, which help generate revenue to support our work and keep our content free for readers. Our editorial team operates independently from our advertising and affiliate partnerships to ensure that our content remains unbiased and focused on providing you with the best information and recommendations based on thorough research and honest evaluations. To remain transparent, we’ve provided a list of our current affiliate partners here.

What are the Side Effects of Synthroid®?

K.C. Bruning
By
Updated May 17, 2024
Our promise to you
WiseGeek is dedicated to creating trustworthy, high-quality content that always prioritizes transparency, integrity, and inclusivity above all else. Our ensure that our content creation and review process includes rigorous fact-checking, evidence-based, and continual updates to ensure accuracy and reliability.

Our Promise to you

Founded in 2002, our company has been a trusted resource for readers seeking informative and engaging content. Our dedication to quality remains unwavering—and will never change. We follow a strict editorial policy, ensuring that our content is authored by highly qualified professionals and edited by subject matter experts. This guarantees that everything we publish is objective, accurate, and trustworthy.

Over the years, we've refined our approach to cover a wide range of topics, providing readers with reliable and practical advice to enhance their knowledge and skills. That's why millions of readers turn to us each year. Join us in celebrating the joy of learning, guided by standards you can trust.

Editorial Standards

At WiseGeek, we are committed to creating content that you can trust. Our editorial process is designed to ensure that every piece of content we publish is accurate, reliable, and informative.

Our team of experienced writers and editors follows a strict set of guidelines to ensure the highest quality content. We conduct thorough research, fact-check all information, and rely on credible sources to back up our claims. Our content is reviewed by subject matter experts to ensure accuracy and clarity.

We believe in transparency and maintain editorial independence from our advertisers. Our team does not receive direct compensation from advertisers, allowing us to create unbiased content that prioritizes your interests.

There are several potential side effects of Synthroid® treatment for hypothyroidism, also known as low thyroid hormone. Most of these symptoms are mild, though there are some severe reactions to the drug that have been reported. The most severe side effects of Synthroid® are the symptoms of an allergic reaction to the drug.

One of the most common side effects of Synthroid® is temporary hair loss. This is most widespread among children who are taking the drug. The loss usually only occurs over the first month of treatment.

Some of other the milder possible side effects of Synthroid® include nausea, stomach cramps, weight loss, or increased appetite. Patients may also experience an increased sensitivity to heat, excessive sweating, or fever. Other symptoms include mental changes such as irritability or nervousness.

There are some patients who may experience diarrhea, vomiting, headache, or a tremor as side effects of Synthroid® treatment. Insomnia and changes in menstrual cycle are also possible. The mild side effects of taking the drug can be discussed with a doctor, but usually only if they become more severe or do not eventually go away on their own.

Severe side effects that arise from taking Synthroid® should be discussed with a doctor immediately. They include chest pain, which is also known as angina, and an irregular or unusually fast heartbeat. Any signs of an allergic reaction as a result of taking the drug should receive emergency medical attention. These include swelling of the throat, lips, face, or tongue and any kind of breathing problems.

There are some conditions which may make taking Synthroid® too risky, or at least require that the patient be observed carefully or take an adjusted dosage while in treatment. The drug is not safe for patients who have or have had adrenal gland problems, a heart attack, or thyrotoxicosis, which is another thyroid disorder. Patients with heart or coronary artery disease, diabetes, anemia, or pituitary gland problems should also speak with a doctor.

Synthroid® is a brand name for the drug levothyroxine. It is also marketed under the names Levothroid®, Levoxyl®, Tirosint® and Unithroid®. The drug is most commonly prescribed for the treatment of hypothyroidism, or low thyroid hormone. It can also be prescribed to treat an enlarged thyroid gland, also known as goiter. The drug works by replacing a hormone that is typically made by the thyroid gland. It helps to ensure the body’s metabolism and energy function properly.

WiseGeek is dedicated to providing accurate and trustworthy information. We carefully select reputable sources and employ a rigorous fact-checking process to maintain the highest standards. To learn more about our commitment to accuracy, read our editorial process.
K.C. Bruning
By K.C. Bruning , Former Writer
Kendahl Cruver Bruning, a versatile writer and editor, creates engaging content for a wide range of publications and platforms, including WiseGeek. With a degree in English, she crafts compelling blog posts, web copy, resumes, and articles that resonate with readers. Bruning also showcases her passion for writing and learning through her own review site and podcast, offering unique perspectives on various topics.

Discussion Comments

K.C. Bruning

K.C. Bruning

Former Writer

Kendahl Cruver Bruning, a versatile writer and editor, creates engaging content for a wide range of publications and...
Learn more
WiseGeek, in your inbox

Our latest articles, guides, and more, delivered daily.

WiseGeek, in your inbox

Our latest articles, guides, and more, delivered daily.