Underactive thyroid

Underactive thyroid, also known as hypothyroidism, is a condition where the thyroid gland does not produce enough of the thyroxine hormone in the body.

  1. Can cause fatigue and weight fluctuations
  2. Left untreated can lead to complications
  3. Medicated with hormone replacement


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0 treatment(s) for Underactive thyroid



  1. Simple tablet treatment
  2. Available in two strengths
  3. Reduces symptoms of hypothyroidism


  1. Effective thyroxine replacement
  2. Reduces symptoms such as tiredness
  3. Simple tablet or oral solution

Underactive thyroid is a condition which affects around one in 1,000 men and 15 in 1,000 women in the UK, according to the NHS. It is characterised by a low production of thyroxine by the thyroid gland, which can cause a range of symptoms including fatigue, weight gain and muscle cramps.

The condition, also known as hypothyroidism or thyroid hormone deficiency, can often be the result of the immune system wrongly attacking the thyroid gland, or a thyroid illness. This causes it to produce less thyroxine, a hormone the body needs to help it convert fat into energy. When levels of this hormone fall, the body’s faculties consequently slow down, and this can lead to symptoms such as lethargy, dry skin, sensitivity to cold, muscle aches and cramps, loss of libido, irregular periods, or constipation.

Diagnosis is carried out via a blood test. Through this, a doctor can measure how much of the hormone is present in the blood.

Levothyroxine is a common treatment for underactive thyroid. It contains a synthetic version of the hormone the thyroid produces, and helps to supplement levels in those where production of this hormone is low. This helps to offset the symptoms of hypothyroidism.

After a starting dose of this drug has been issued, a doctor will usually continue to undertake blood tests at certain intervals in order to monitor the levels of thyroxine in the patient’s body. This will help them to determine an appropriate maintenance dose.

You cannot buy medication for underactive thyroid on our site. If you wish to renew a prescription, you should contact your doctor.

Page last reviewed:  Friday, Sep 08 2017
Types of Treatment

Levothyroxine is the most typical treatment for underactive thyroid. It is a generic medicine made by a number of different manufacturers, including Actavis. Given in tablet form, this drug is available in 25, 50 or 100 microgram doses.

How do they work?

These tablets work by supplementing the hormone which is being underproduced by the thyroid gland, thyroxine. In doing so, it helps to prevent symptoms which result from a deficit of this hormone, which plays a vital part in the process of energy conversion in the body.

What are the side effects?

Several side effects have been associated with the use of this medicine although not everyone will get them. These include (but are not limited to) headache, flushing and weight loss.

Can I take them with other medications?

It depends which other treatments you are using. There are many possible contraindications listed in the clinical information for this item, so you should let your doctor know about any other prescription, non-prescription or remedial items you are taking during consultation.

Page last reviewed:  Friday, Sep 08 2017
Question and Answers

What’s the difference between the medications?

Even though it is manufactured by several different companies due to its generic status, Levothyroxine is the main ingredients and therefore performs the same function.

Should I take Levothyroxine?

It depends on whether or not your doctor thinks it is suitable. Let your prescriber know about any medical conditions you have during consultation. There are a range of health factors to consider, and you can find out more about these on the product information page. Regular testing and monitoring with your GP is also necessary when taking this treatment.

Are there different side effects?

The side effects associated with Levothyroxine are the same, no matter which pharmaceutical company makes it, as it is subject to the same manufacturing conditions. You can find out more about side effects on the product page.

Is it right for me?

If you are experiencing the symptoms of hypothyroidism for the first time, you should make an appointment with your GP. Your doctor will be able to diagnose the condition and help you determine which treatment is most suitable, after monitoring your thyroid function through various tests. If you are seeking to renew your existing prescription for thyroid treatment, you should speak to your doctor. You cannot buy underactive thyroid treatment from our service.

Page last reviewed:  Friday, Sep 08 2017
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