Levothyroxine is prescribed as a hormone replacement.

Formulation – Levothyroxine is formulated using lactose, magnesium stearate, maize starch, stearic acid and pregelatinised maize starch.

Levothyroxine is a drug that belongs to the Thyroids drug class, and it has been found useful in additional to its main prescribed use to treat underactive thyroid. If any side effects are caused by this drug a range of alternative drugs, listed further down this guide, may be prescribed.

Side Effects / Precautions

Levothyroxine does have quite a number of side effects and those side effects which you may experience when taking it include Weight loss. Tremor. Headache. Nausea. Vomiting. Diarrhoea. Stomach cramps. Nervousness.

Levothyroxine does have side effects as mentioned above, and if you experience any of the above side effects, you should consult a doctor or medical professional immediately. As a precaution you should also have a discussion with your doctor to see if this drug is suitable for you if you have any pre-existing medical conditions.


Synthroid – One of the many different alternative drugs that you may be prescribed is this one, and it is a drug that has been found to be a good alternative should you be suffering from an underactive thyroid. There are several other alternatives you could be prescribed by your doctor for that condition and they are Synthroid.