Eltroxin (Levothyroxine)

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Eltroxin Brand

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Levothyroxine (Generic alternate to Eltroxin) Generic
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Eltroxin is an orall medication indicated to treat an underactive thyroid (hypothyroidism). It is a synthetic version of the hormone thyroxine, which is normally produced by the thyroid gland. It contains an active ingredient called Levothyroxine. Levothyroxine works by replacing the missing thyroid hormone in the body.

Levothyroxine replaces or provides more thyroid hormone to the body when the thyroid gland is unable to produce enough thyroxine. Thyroxine is responsible for regulating metabolism and other bodily functions. By increasing the levels of thyroid hormone in the body, Eltroxin helps to reduce the symptoms of an underactive thyroid gland (hypothyroidism), which commonly include fatigue, weight gain, and depression.

Uses and Dosage

Levothyroxine is typically taken in the form of tablets, which should be taken by mouth as instructed by your doctor. The recommended dosage is usually once daily on an empty stomach, 30 minutes to 1 hour before breakfast. Take the tablet with a full glass of water unless your doctor gives you other instructions.

Be sure to swallow it whole without crushing, splitting, or chewing tablet. However, if you are giving the tablet to an infant or child who cannot swallow whole tablets, you can crush the tablet and mix it with 1 to 2 teaspoons of water. Then, give the mixture to the child immediately using a spoon or dropper. Do not prepare the mixture in advance or mix the tablet in soy infant formula. Always follow your doctor's instructions carefully and talk to your pharmacist if you have any questions about taking levothyroxine.

Side effect

Common Side Effects of Eltroxin (Levothyroxine):

  • Chest pain
  • Diarrhea
  • Feeling restless/excited.
  • Fever
  • Headache
  • Inability to sleep
  • Muscle weakness/cramps, tremors
  • Palpitations (irregular heartbeat)
  • Rapid breathing
  • Sweating/flushing
  • Vomiting
  • Weight loss

Serious Side Effects of Eltroxin (Levothyroxine):

  • Appetite changes
  • Decreased fertility
  • Diarrhea
  • Fatigue
  • Fever
  • Flushing
  • Hair loss (temporary; particularly in children during the first month of treatment)
  • Headache
  • Increased sweating
  • Menstrual cycle changes
  • Muscle cramps
  • Muscle weakness
  • Nervousness or irritability
  • Restlessness
  • Sensitivity to heat
  • Sleepiness
  • Stomach cramps
  • Tremor (shaking)
  • Trouble sleeping
  • Upset stomach
  • Weight changes

Form and Strength

Eltroxin (Levothyroxine) is available in the following forms and strength:

Levothyroxine: Tablet

  • 88 mcg


  • Eltroxin can interact with other medications, including blood thinners, diabetes medications, and antidepressants. Inform your doctor of all medications you are taking before starting treatment with Eltroxin.
  • Taking too much Eltroxin can have adverse effects, including tremors, nervousness, rapid heartbeat, chest pain, and gastrointestinal issues. It is important to follow your doctor's dosage instructions carefully to avoid any potential overdose.
  • Women who are pregnant or breastfeeding should talk to their doctor before taking Eltroxin, as it may have an impact on the developing fetus or nursing infant.
  • Eltroxin may not be recommended for individuals with certain medical conditions, such as heart disease, diabetes, or adrenal gland issues.
  • Before taking Eltroxin, individuals with pre-existing medical conditions such as heart disease, high blood pressure, diabetes, or adrenal gland issues, should inform their doctor, as these conditions can affect how this medication works.
  • Some individuals may experience severe allergic reactions to Eltroxin. Symptoms may include difficulty breathing, hives, and swelling of the face, lips, tongue, or throat. If you experience any of these symptoms, seek immediate medical attention.
  • Individuals taking Eltroxin need to have regular blood tests to monitor their thyroid hormone levels, to determine if the medication is working properly and to ensure dosage adjustments are made if necessary.
  • Taking too much Eltroxin can result in symptoms like fever, sweating, confusion, chest pain, irregular heartbeat, and fainting. In some cases, an overdose of levothyroxine can be life-threatening. Follow your doctor's instructions carefully to avoid an overdose.

Frequently Asked Questions (FAQ)

Can Eltroxin be used to treat hyperthyroidism?

No, Eltroxin is not used to treat hyperthyroidism. In fact, it can make hyperthyroidism worse.

How is Eltroxin taken?

Eltroxin is usually taken once a day on an empty stomach, at least 30 minutes before breakfast. It should be taken at the same time every day.

Can Eltroxin be taken with other medications?

Your doctor needs to know about all the medications you are taking, as some can interact with Eltroxin. For example, calcium supplements, iron supplements, and antacids can reduce the absorption of Eltroxin.

How long does it take for Eltroxin to work?

Eltroxin may take several weeks for Eltroxin to start working. Continue taking Eltroxin as prescribed by your doctor, even if you do not feel any different at first.

Are there any foods or supplements that should be avoided while taking Eltroxin?

It is best to take Eltroxin on an empty stomach, at least 30 minutes before breakfast. Calcium supplements, iron supplements, and antacids should be taken at least 4 hours before or after Eltroxin. Foods high in fiber can also reduce the absorption of Eltroxin, so it is best to wait at least 2 hours after taking Eltroxin before eating foods high in fiber.


It's important to purchase Eltroxin from verified Canadian pharmacy.

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