Levothyroxine is used to treat hypothyroidism (low thyroid hormone). This medicine helps reduce the symptoms of low thyroid hormone such as sensitivity to cold, weight gain, dry skin, and lack of energy. It is also used to treat or prevent goiter (enlarged thyroid gland) caused by hormone imbalances, surgery, cancer, or radiation treatment. Besides, this medication is prescribed for thyroiditis, thyroid cancer, and thyroid nodules. This medicine may also be used to treat other conditions as determined by your doctor.

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What does Levothyroxine treat?

Levothyroxine is used to treat those who have a condition called Hyperthyroidism where the thyroid gland is underactive. Inadequate levels of the thyroid hormone can impair normal mental and physical activity besides cause symptoms like dry skin, sensitivity to cold, weight gain and lack of energy. It also serves to prevent Goiter which is the enlargement of the thyroid gland due to hormone imbalances, surgery, cancer or radiation treatment. This is also indicated for the treatment of conditions such as thyroiditis, thyroid cancer and thyroid nodules. This may be used in other treatments based on the decision of your physician.

Levothyroxine Side Effects:

Levothyroxine does not have any major side effects and if any, they are minor and temporary. In rare cases, there might be major side effects and immediate medical attention must be sought. Side effects cannot be anticipated in advance.

Side effects of Levothyroxine may include headache, hair loss, weight loss, diarrhea, sensitivity to heat, nervousness, insomnia, sweating, tiredness and increased appetite. This is not the complete list though.

In case, there is a change in intensity of side effects or if any new side effects develop, make sure you consult your doctor.

Dosage Instructions:

Follow the Levothyroxine dosage prescribed by your physician. The dosage could vary based on individual patient requirements. Always take this medication with a full glass of water.

Missed a dose?

Take it immediately once you remember. In case, this time is closer to the next dosage, skip it and get back to the prescribed schedule. Never ever double the doses unless your doctor specifically instructs you so.


Don’t waste any time and seek immediate medical attention.

Drug Interactions

Drug interactions must be considered before starting to take any kind of drug. Drug interactions might happen either when Levothyroxine is taken along with another drug or with particular foods. To prevent any kind of negative interaction, make sure you inform your doctor of any drugs you are taking including OTCs, vitamins, minerals, herbal medicine and so on.

Levothyroxine interacts with:

  • Digoxin
  • Conjugating Estrogens
  • Sucralfate

Levothyroxine may interact with tricyclic antidepressants, anti-diabetes medications and antacids with aluminum. The list above is not exhaustive and drugs other than those could also interact with Levothyroxine.

It’s important that you do not stop or start taking any medicine without the consent of your physician.

Where can I buy Levothyroxine over the counter?

If your hypothyroidism is caused by some sort of iodine deficiency, your doctor may recommend an iodine supplement like Levothyroxine over the counter. Additionally, magnesium and selenium supplements might also help in improving the condition. As always, ask the doctor before consuming any supplements.

Can I buy Levothyroxine without a prescription?

The thyroid gland makes thyroid hormones that can help in controlling energy levels and growth. Levothyroxine medicine is taken to replace the missing thyroid hormone thyroxine. Levothyroxine without prescription is not available as it is only prescription medication. It comes as tablets or as a liquid that one might swallow.

What to ask your doctor before you start on Levothyroxine tablet?

  • Can I take Levothyroxine along with other drugs? 
  •  Are there certain foods, beverages and products to be avoided while on Levothyroxine?
  •  What is the dosage of Levothyroxine to be consumed?
  •  How should I use Levothyroxine? 
  •  How will Levothyroxine work in my body?
  •  How can the drug interactions and side effects of Levothyroxine be minimized or completely avoided?


The health and medical information that we have provided are meant to supplement and not substitute the advice of your physician, pharmacists or other health care professionals. This does not suggest that usage of Levothyroxine is safe appropriate or effective for you. Always ensure that you take this or any other drug only after consulting your physician.