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3. How to take Eltroxin® Tablets


Eltroxin 50 and 100 micrograms Tablets

Levothyroxine sodium
Read all of this leaflet carefully before you start taking this medicine.
Keep this leaflet. You may need to read it again. If you have any further questions, ask your
doctor or pharmacist. This medicine has been prescribed for you. Do not pass it on to others. It
may harm them, even if their symptoms are the same as yours. If any of the side effects become
serious, or if you notice any side effects not listed in this leaflet, please tell your doctor or
The product is known by the name above but will be referred to as Eltroxin® Tablets
throughout the rest of this leaflet.
In this leaflet:
1. What Eltroxin® Tablets are and what they are used for
2. Before you take Eltroxin® Tablets
3. How to take Eltroxin® Tablets
4. Possible side effects
5. How to store Eltroxin® Tablets
6. Further information

1. What Eltroxin® Tablets are and what they are used for
Eltroxin contains levothyroxine sodium which is a synthetic form of the hormone thyroxine.
Thyroxine is normally in the body produced by the thyroid gland in the neck. It controls many bodily
functions, mainly to do with growth and energy.
Eltroxin® is used to treat an under active thyroid which is not producing enough thyroxine.

2. Before you take Eltroxin® Tablets
DO NOT take Eltroxin Tablets if:
• you know that you are allergic to levothyroxine sodium or any of the other ingredients of
Eltroxin® (see section 6 of this leaflet)
• you have been told that your thyroid is overactive (where your thyroid gland produces too much
Please tell your doctor if any of the above applies to you.
Take special care with Eltroxin® Tablets if you:
• suffer from diabetes. The dosage of your diabetic treatment may need to be altered.
• suffer from high blood pressure, heart failure or a heart attack
• suffer from any condition which affects your adrenal glands (your doctor will be able to advise you)
• you are over 50 years of age
• have a long standing history of low thyroxine levels.
It is important that your doctor is aware if any of the above apply to you.
Taking other medicines:
Please tell your doctor or pharmacist if you are taking or have recently taken any other medicines,
including medicines obtained without a prescription, especially if you are taking:
• digoxin, used to treat heart problems including an irregular heart beat
• insulin and other treatments for diabetes
• colestyramine and colestipol, used to reduce the level of cholesterol in the blood
• calcium supplements, used to treat low levels of calcium in your blood
• antacids, used to treat indigestion
• rifampicin, used to treat infections
• iron preparations, used to treat anaemia
• cimetidine, used to treat excess acid in the stomach
• beta-blockers (e.g. propranolol) used to treat high blood pressure
• drugs used to treat epilepsy (e.g. phenytoin, carbamazepine, primidone, barbiturates)
• anticoagulants (e.g. warfarin) used to thin the blood and treat blood clots
• drugs used to treat depression and other conditions, including amitriptyline, imipramine and
• oral contraceptives (“the pill”)
• steroids and other hormone treatments such as male hormone replacement therapies
• anti-inflammatory drugs e.g. phenylbutazone and aspirin
• decongestant medicines such as phenylephrine, or adrenaline (for treatment of severe allergies)
• imatinib, used for the treatment of cancer
• sodium polystyrene sulfonate, used in the treatment of kidney failure
• sucralfate, used for the treatment of gut ulcers
• ketamine, used as an anaesthetic.
Pregnancy and breast feeding:
If you are pregnant particularly in the first three months or planning to become pregnant or are
breast-feeding discuss your medication with your doctor. The decision on whether it is best to take
Eltroxin® tablets during pregnancy or breast feeding will be made by your doctor.
Ask your doctor or pharmacist for advice before taking any medicines.
Driving and using machines:
Eltroxin® tablets should not interfere with your ability to drive or use machinery.
Important information about some of the ingredients of Eltroxin® Tablets:
This medicine also contains lactose, a sugar. If you have been told by your doctor that you have
an intolerance to some sugars, contact your doctor before taking this medicine.

Always take Eltroxin® Tablets exactly as your doctor has told you. Do NOT take more than your
doctor tells you to. You should check with your doctor or pharmacist if you are not sure.
Swallow the tablets with a glass of water, preferably before breakfast.
The usual starting dose for adults is 50 to 100 micrograms daily. This may be adjusted after a few
weeks depending on the response to your treatment which will be monitored by blood tests.
For patients over 50 years the starting dose will not usually exceed 50 micrograms.
Children under 12 years:
The dose for children depends on their age, weight and the condition being treated.
Your child will be monitored to make sure he/she gets the right dose. Give your child this medicine
at least half an hour before the first meal of the day.
Congenital hypothyroidism in infants:
Initially 10 to 15 micrograms/kg body weight a day for the first 3 months. The dose will then be
adjusted depending on response to treatment.
Acquired hypothyroidism in children:
Initially 12.5 to 50 micrograms a day. The dose should be increased gradually every 2 to 4 weeks
depending on response to treatment. If required the tablets can be dissolved in 10 to 15ml of
drinkable water and given freshly prepared with some more liquid (5 to 10ml).
In the event of stopping treatment, Eltroxin® tablets should be withdrawn gradually under the
supervision of your doctor.
If you take more Eltroxin® Tablets than you should:
If you think that you, or any other person, have taken too many tablets, contact your doctor or
hospital casualty department immediately. Take any remaining tablets and this leaflet with you so
that the medical staff knows exactly what you have taken.
If you forget to take your Eltroxin® Tablets:
If you miss a dose but remember within two or three hours you can still take that dose. If you miss
a dose for longer then do not catch up. Wait until your next dose is due and take the normal amount.

4. Possible side effects
Like all medicines, Eltroxin® tablets can sometimes cause side effects, although not everybody gets them.
The following effects can occur if your initial dose of the medicine is too high:
All medicines can cause allergic reactions although serious allergic reactions are rare. Any
sudden wheeziness, difficulty in breathing, swelling of the eyelids, face or lips, rash or itching
(especially affecting your whole body) should be reported to a doctor immediately.
• fever
• intolerance to heat
• mild hair-loss is seen in children
• loose stools
• tremor (shaking), restlessness, excitability
• difficulty sleeping
• rapid heart beat or angina (pain in the chest on exercise).
You should consult your doctor if any of the above effects occur. The effects usually go away when
the dose has been changed.
Other side effects you could experience are:
• irregular heart beats, palpitations (thumping heart beats)
• muscle cramps or weakness
• vomiting
• headaches, flushing, sweating
• loss of weight
• in women – changes to your periods.
If any of the side effects become serious, or if you notice any side effects not listed in this leaflet,
please tell your doctor or pharmacist.

5. How to store Eltroxin® Tablets
Keep this medicine out of the sight and reach of children.
Do not use Eltroxin® tablets after the expiry date which is stated on the box. The expiry date refers
to the last day of that month. If your tablets are out of date, take them to your pharmacist who will
get rid of them safely.
Do not store above 25°C. Store in the original package and protect from light and moisture.

6. Further information
What Eltroxin Tablets contain:
This leaflet concerns two strengths of Eltroxin® tablets. Each strength contains respectively 50 and
100 micrograms of anhydrous levothyroxine sodium. The other ingredients are sodium citrate,
lactose, maize starch, acacia powder, magnesium stearate and purified water.
What Eltroxin® Tablets look like and contents of the pack:
Each tablet is scored on one side and engraved on the other with either
50mcg – FW21
100mcg – FW31
They are packed in a blister pack of 28, 56 or 112 tablets and polypropylene containers of 28, 56,
100, 112, 500 or 1000 tablets. Not all pack sizes may be marketed.
Marketing Authorisation Holder:
Mercury Pharma Group Limited,
No.1 Croydon, 12-16 Addiscombe Road, Croydon CR0 0XT, UK.
Custom Pharmaceuticals Ltd.,
Tecore House, Conway Street, Hove, East Sussex, BN3 3LW, UK
This leaflet was last revised in March 2012.
Eltroxin is a registered trademark of Mercury Pharma Group Limited.

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Source: Medicines and Healthcare Products Regulatory Agency

Disclaimer: Every effort has been made to ensure that the information provided here is accurate, up-to-date and complete, but no guarantee is made to that effect. Drug information contained herein may be time sensitive. This information has been compiled for use by healthcare practitioners and consumers in the United States. The absence of a warning for a given drug or combination thereof in no way should be construed to indicate that the drug or combination is safe, effective or appropriate for any given patient. If you have questions about the substances you are taking, check with your doctor, nurse or pharmacist.