Synthroid is a hormone drug indicated for individuals experiencing thyroid gland malfunctioning. This drug imitates thyroid hormone. This drug is commonly used for preventing goiter, hormone imbalance, cancer, surgery and radiation therapy. There are other uses of this drug too.


Synthroid is primarily used to treat hypothyroidism, a condition that occurs when the hormone thyroxine is not produced in the required amounts by the thyroid glands.

The drug is especially useful in those who require long-term or lifelong hormone therapy for the thyroid. The medication may also be used to treat a condition known as goiter due to the drug’s ability to the thyroid-stimulating hormone, which also induces goiter.

Other uses of Synthroid drug extend to interventional therapy in those for whom conditions like thyroid cancer or thyroid disease require suppression of the thyroid-stimulating hormone. There may be those for whom the symptoms persist even after the hormone levels have been reduced and show so in test results.

The doctor may insist on undertaking additional tests under such circumstances. Furthermore, all dietary and medical supplements that can affect the hormone levels are evaluated to provide a clearer route of therapy.

Drug information

Do not take this drug if you have any medical condition related to heart, blood sugar, blood cell count, bone, allergies, adrenal grand or, thyrotoxicosis. Synthroid mixes with the breast milk. There is no scientific evidence to prove that the medication causes problem to the unborn child or the nursing baby.

Do not continue the same dose that you had, before pregnancy. Contact a gynecologist to adjust your dose during pregnancy and breast-feeding.

Though taking Synthroid is not a complicated process, it is to be noted that the medication should not be consumed without a doctor’s consultation.

Any impurities in the drug can trigger side effects that are considered to be rare and uncommon. You should also avoid food items like high fiber food, soy related items, cotton seed and others.

Though this drug helps to reduce weight and suppresses appetite, it is very dangerous to consume this drug without consulting a doctor. Misusing this drug can cause fatal consequences too.


The Synthroid dose should be taken only as recommended by the healthcare provider and the instructions on the prescription label. It is not recommended to modify the dose on one’s own by increasing or decreasing it without the doctor’s consultation as it can affect the hormone levels.

Take the prescribed dose orally at least half an hour before taking the first meal. There are many drugs that can affect how Synthroid works. Other drugs may be safely taken with a time lapse of at least four hours.

The drug should not be skipped. If you forget a dose, take it as soon as you remember to do so. Avoid doubling the dose or increasing the dosage to make up for the missed dose.

Skip the missed dose entirely if the timing is closer to that of the next scheduled dose. In case of suspected drug overdose, get emergency medical assistance without any delay.

Side effects

Common side effects of Synthroid are

  • mild hair loss,
  • cold skin,
  • headache,
  • confusion,
  • weak pulse,
  • loss of consciousness.

The drug can also cause allergic reactions in those who are allergic to Levothyroxine. For symptoms that are persistent or severe get immediate medical assistance.

Severe adverse symptoms may be

  • difficulty breathing,
  • irregular heartbeat,
  • fever,
  • high blood pressure,
  • nausea,
  • changes in menstruation,
  • mood swings,
  • chest pain.

Relative Contraindications

As stated before, Synthroid is not for use in all types of people. If you are suffering from osteoporosis, diabetes, anema then talk to your doctor before taking this drug. This drug interacts with iron supplements, calcium carbonate supplements, antacids, sodium polystyrene, colestipol and others.


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