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Levothyroxine Sodium is used for Less thyroid hormone production and other conditions.
This salt may also be used for purposes not listed in this medication guide.
Detailed information related to Levothyroxine Sodium's uses, side-effects, reviews, questions, interactions, and precautions is as follows:


Levothyroxine Sodium is used for the treatment, control, prevention, & improvement of the following diseases, conditions and symptoms:
  • Less thyroid hormone production
  • Levothyroxine Sodium may also be used for purposes not listed here.
Learn more: Uses

Levothyroxine Sodium Side-effects

The following is a list of possible side-effects that may occur in medicines that contain Levothyroxine Sodium. This is not a comprehensive list. These side-effects are possible, but do not always occur. Some of the side-effects may be rare but serious. Consult your doctor if you observe any of the following side-effects, especially if they do not go away.
If you notice other side-effects not listed above, contact your doctor for medical advice. You may also report side-effects to your local food and drug administration authority.
Learn more: Side-effects


Before using Levothyroxine Sodium, inform your doctor about your current list of medications, over the counter products (e.g. vitamins, herbal supplements, etc.), allergies, pre-existing diseases, and current health conditions (e.g. pregnancy, upcoming surgery, etc.). Some health conditions may make you more susceptible to the side-effects of the drug. Take as directed by your doctor or follow the direction printed on the product insert. Dosage is based on your condition. Tell your doctor if your condition persists or worsens. Important counseling points are listed below.
  • ECG is required before the treatment
  • Have diabetes, high blood pressure, heart failure or have had a heart attack, conditions that affect adrenal glands, elderly or history of hypothyroidism
  • Take skipped dose within 2 to 3 hours
  • Take this drug in the morning on an empty stomach at least half an hour before the first meal

Interactions with Levothyroxine Sodium

If you use other drugs or over the counter products at the same time, the effects of Levothyroxine Sodium may change. This may increase your risk for side-effects or cause your drug not to work properly. Tell your doctor about all the drugs, vitamins, and herbal supplements you are using, so that you doctor can help you prevent or manage drug interactions. Levothyroxine Sodium may interact with the following drugs and products:
Learn more: Interactions

When not to use Levothyroxine Sodium

Hypersensitivity to Levothyroxine Sodium is a contraindication. In addition, Levothyroxine Sodium should not be used if you have the following conditions:
  • Cardiovascular disease
  • Elderly
  • Hypertension
  • Myocardial infarction
  • Obesity
  • Uncorrected adrenal failure
  • Untreated hyperthyroidism
Learn more: Contraindications

Levothyroxine Sodium - Frequently asked Questions

  • Is Levothyroxine Sodium safe to use when pregnant?
  • Is Levothyroxine Sodium safe while breastfeeding?
    Please discuss the risks and benefits with your doctor.
  • Is it safe to drive or operate heavy machinery when using this product?
    If you experience drowsiness, dizziness, hypotension or a headache as side-effects when using Levothyroxine Sodium medicine then it may not be safe to drive a vehicle or operate heavy machinery. One should not drive a vehicle if using the medicine makes you drowsy, dizzy or lowers your blood-pressure extensively. Pharmacists also advise patients not to drink alcohol with medicines as alcohol intensifies drowsiness side-effects. Please check for these effects on your body when using Levothyroxine Sodium. Always consult with your doctor for recommendations specific to your body and health conditions.
  • Is this medicine or product addictive or habit forming?
    Most medicines don't come with a potential for addiction or abuse. Usually, government's categorizes medicines that can be addictive as controlled substances. Examples include schedule H or X in India and schedule II-V in the US. Please consult the product package to make sure that the medicine does not belong to such special categorizations of medicines. Lastly, do not self-medicate and increase your body's dependence to medicines without the advice of a doctor.
  • Can i stop using this product immediately or do I have to slowly ween off the use?
    Some medicines need to be tapered or cannot be stopped immediately because of rebound effects. Please consult with your doctor for recommendations specific to your body, health and other medications that you may be using.

Other important Information on Levothyroxine Sodium

Missing a dose

In case you miss a dose, use it as soon as you notice. If it is close to the time of your next dose, skip the missed dose and resume your dosing schedule. Do not use extra dose to make up for a missed dose. If you are regularly missing doses, consider setting an alarm or asking a family member to remind you. Please consult your doctor to discuss changes in your dosing schedule or a new schedule to make up for missed doses, if you have missed too many doses recently.

Overdosage of Levothyroxine Sodium

  • Do not use more than prescribed dose. Taking more medication will not improve your symptoms; rather they may cause poisoning or serious side-effects. If you suspect that you or anyone else who may have overdosed of Levothyroxine Sodium, please go to the emergency department of the closest hospital or nursing home. Bring a medicine box, container, or label with you to help doctors with necessary information.
  • Do not give your medicines to other people even if you know that they have the same condition or it seems that they may have similar conditions. This may lead to overdosage.
  • Please consult your physician or pharmacist or product package for more information.

Storage of Levothyroxine Sodium

  • Store medicines at room temperature, away from heat and direct light. Do not freeze medicines unless required by package insert. Keep medicines away from children and pets.
  • Do not flush medications down the toilet or pour them into drainage unless instructed to do so. Medication discarded in this manner may contaminate the environment. Please consult your pharmacist or doctor for more details on how to safely discard Levothyroxine Sodium.

Expired Levothyroxine Sodium

  • Taking a single dose of expired Levothyroxine Sodium is unlikely to produce an adverse event. However, please discuss with your primary health provider or pharmacist for proper advice or if you feel unwell or sick. Expired drug may become ineffective in treating your prescribed conditions. To be on the safe side, it is important not to use expired drug. If you have a chronic illness that requires taking medicine constantly such as heart condition, seizures, and life-threatening allergies, you are much safer keeping in touch with your primary health care provider so that you can have a fresh supply of unexpired medications.

Dosage Information

Please consult your physician or pharmacist or refer to product package.

Cite this page

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APA Style Citation

  • Levothyroxine Sodium - Uses, Side-effects, Reviews, and Precautions - TabletWise. (n.d.). Retrieved December 02, 2018, from

MLA Style Citation

  • "Levothyroxine Sodium - Uses, Side-effects, Reviews, and Precautions - TabletWise" N.p., n.d. Web. 02 Dec. 2018.

Chicago Style Citation

  • "Levothyroxine Sodium - Uses, Side-effects, Reviews, and Precautions - TabletWise" Tabletwise. Accessed December 02, 2018.

Last updated date

This page was last updated on 8/02/2018.
This page provides information for Levothyroxine Sodium in English.

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