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Levothyroxine is a medicine, licensed by Wockhardt, which is used to treat low levels of thyroid hormones.

You can renew your prescription and buy levothyroxine online, you can do so through our online service.

Levothyroxine 25mcg
Levothyroxine 50mcg
Levothyroxine 100mcg
28 Tablets
56 Tablets
28 Tablets
56 Tablets
28 Tablets
56 Tablets
Order now to receive your order Tuesday, February 26
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  1. Click on the green "proceed to consultation" button.
  2. Fill in our short consultation form.
  3. Choose delivery method and mode of payment.
  4. Our team of expert prescribers will assess whether medication is suitable.
  5. If you get the green light and it is deemed suitable, your order will be processed quickly and efficiently.
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About Product

What is levothyroxine?

Levothyroxine is a medicine used to treat those with an underactive thyroid.

The thyroid gland is located in your neck and is responsible for the regulation of hormones called thyroxine and triiodothyronine - also known as T4 and T3 respectively.

An underactive thyroid is often caused by an autoimmune disease. This causes the immune system, the body's natural defense mechanism, to fight tissues and cells within the body. When attacked by the immune system, the thyroid gland can become damaged and produce less of the necessary hormones.

The symptoms of an underactive thyroid can take a long time to develop.But these symptoms can include:

  • Depression
  • Dry skin and hair
  • Muscle aches
  • Sensitivity to the cold
  • Tiredness
  • Weight gain
  • Constipation
  • Slowing of movements and thoughts
  • Muscle aches, weakness and cramps
  • Brittle hair and nails
  • Decreased libido (sex drive)
  • Pain, numbness and tingling sensation in the hand and fingers
  • Irregular or heavy periods

The condition is usually diagnosed following a blood test.

If left untreated, hypothyroidism can lead to complications such as heart problems, mental health issues, peripheral neuropathy, infertility and myxoedema.

How does levothyroxine work?

Levothyroxine works to replace the hormones which your thyroid gland produces, known as thyroxine. During the course of treatment, regular blood tests will need to be taken. This is to determine the right dosage and to make sure the treatment is working for you.

Once the right dosage has been achieved, you will need further blood tests to ensure the treatment is working effectively.

It is possible to have an underactive thyroid without exhibiting any symptoms, though treatment is not usually given in these circumstances. However, treatment may be suggested if symptoms occur.

How do I take levothyroxine?

Levothyroxine should be taken once in the morning before food or caffeinated beverages, as these can effect the thyroid.

Swallow one capsule with a glass of water. Do not cut or crush the capsule.

Always follow the doctors instructions.

Always read the patient information leaflet enclosed with your medicine before taking levothyroxine.

Levothyroxine side effects and cautions

Levothyroxine doesn't tend to cause adverse effects unless the recommended dose is exceeded.

Some people may experience an adverse reaction to high levels of thyroid hormone. This is called a "Thyroid crisis" and can cause:

  • Coma
  • Confusion
  • Fast or irregular heartbeat
  • Fits
  • Heart failure
  • Jaundice
  • Low blood pressure
  • Very high temperature

If you experience signs of an allergic reaction to levothyroxine, stop taking the medicine and go straight to the hospital if you have:

  • Difficulty breathing
  • General feeling of malaise
  • Joint pains
  • Sensitivity to sunlight
  • Severe itching with raised lumps
  • Swelling of the face, tongue, lips and throat

If you are concerned about any of the risks listed above, do not hesitate to contact your GP or doctor about your treatment.

Speak to your doctor before taking levothyroxine if you:

  • Are taking medicine for diabetes, such as insulin or tablets
  • Are taking blood thinning medicine (warfarin)

Some medicine can affect the amount of levothyroxine your body absorbs. These include:

  • Antacids
  • Calcium salts
  • Colesevelem
  • Colestipol
  • Colestyramine
  • Orlistat (Weight loss medicine)
  • Sucralfate

If you are or planning on becoming pregnant, speak to your doctor before taking levothyroxine. It is generally regarded as safe to breastfeed while taking levothyroxine. Always read the patient information leaflet enclosed with your medicine before taking it.

Levothyroxine should not impact your ability to drive or operate machinery.

For more information regarding the safety of this medicine, we urge you to read the patient information leaflet.

If you experience any side effects of this medication, you can report your side effects to the Yellow Card Scheme.

Frequently asked questions about levothyroxine

How soon does levothyroxine begin to work?

It usually takes between 7 to 10 days for the levothyroxine to be absorbed by the cells. However, it can take many weeks before improvements will become noticeable.

What happens if I stop taking levothyroxine?

You should not stop taking levothyroxine without the doctors consent. If you stop taking the medicine, you may pose risks to your health such as:

  • Change in sex drive
  • Changes in blood pressure
  • Constipation
  • Depression
  • Hair loss
  • Increased cholesterol
  • Increased risk of infection
  • Infertility
  • Low body temperature
  • Memory problems
  • Menstrual irregularities
  • Weight gain

What should I do if I take more levothyroxine than I should?

Taking too much levothyroxine can lead to symptoms of an overactive thyroid. These symptoms may include:

  • Fatigue
  • Increased appetite
  • Sensitivity to heat
  • Sweating

You should never take more levothyroxine than your doctor prescribes.

What should I do if I forget to take levothyroxine?

If you forget to take your dose of levothyroxine, take it as soon as you remember.

If it is near the time of your next dose, skip the missed dose and continue your treatment as normal.

Do not double dose to make up for the missed dose.

Will it affect my contraception?

Hormonal contraceptive pills which contain oestrogen can affect the levels of levothyroxine in your body.

Your doctor may need to change your dosage of levothyroxine if you start or stop taking contraceptive pills.

How long will I need to take levothyroxine?

You will need to take levothyroxine indefinitely. Ceasing treatment early will most likely cause your symptoms to return.

Is is safe to take levothyroxine for a long time?

Yes, it is safe to take levothyroxine for a long period of time, so long as you follow your doctors prescription.

Table of contents

What is levothyroxine?

How does levothyroxine work?

How to take levothyroxine?

Levothyroxine side effects and cautions

Frequently asked questions


Treatment information

  • Product Name: Levothyroxine
  • Active Ingredients: Thyroxine and triiodothyronine
  • Manufacturer: Wockhardt
  • Administration: Oral
  • Presentation: Tablets
  • Available Strength: 25, 50, 100mcg
  • Exemption: Subject to medical prescription
  • Application: Men and women over 18 with a diagnosed underactive thyroid
  • Dosage: Take one tablet every morning without food
  • Description: Levothyroxine is a prescribed treatment for an underactive thyroid
  • Drug Class: Synthetic hormone
  • Alcohol Consumption: No influence
  • When Pregnant: Safe to take while pregnant. Please inform your prescriber if you are pregnant
  • When Breastfeeding: Safe to take while breastfeeding. Please inform your prescriber if you are breastfeeding