ETHAMBUTOL 400 MG TABLETS

Active substance: ETHAMBUTOL HYDROCHLORIDE

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PATIENT INFORMATION LEAFLET
Ethambutol 100 mg Tablets
Ethambutol 400 mg Tablets
(ethambutol hydrochloride)
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 your 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 gets serious, or if you notice any side effects not listed in
the leaflet, please tell your doctor or pharmacist.

In this leaflet
1. What Ethambutol Tablets are and what they are used for
2. Before you take Ethambutol Tablets
3. How to take Ethambutol Tablets
4. Possible side effects
5. How to store Ethambutol Tablets
6. Further Information
1. WHAT ETHAMBUTOL TABLETS ARE AND WHAT THEY ARE USED FOR
The active ingredient in your tablets is ethambutol hydrochloride, which belongs to a
group of medicines called anti-tuberculosis drugs. These are used to treat and
prevent tuberculosis which is an infectious disease mainly affecting the lungs.

2. BEFORE YOU TAKE ETHAMBUTOL TABLETS
Do not take these tablets if you:
• are allergic (hypersensitive) to ethambutol, or to any of the other ingredients
(these are listed in section 6, Further Information)
• have problems with your eyes or your eyesight (unless your doctor has decided it
is essential).
Take special care with Ethambutol Tablets:
Before you take Ethambutol Tablets you should tell your doctor if you have:
• problems with your eyesight - your doctor will arrange for a full check of your
eyesight before you start taking this medicine. If you notice any changes to your
vision whilst taking this medicine, you MUST inform your doctor straight away.
Young children or people with communication difficulties should be closely
monitored by their parents or carers for any signs of problems with their
eyesight.
• kidney problems as your doctor may decide to adjust the dose of Ethambutol
Tablets.

Taking other medicines
Ethambutol Tablets should not be taken at the same time as antacid medicines
containing aluminium hydroxide (used to relieve heartburn and indigestion), as this
can make ethambutol less effective.
Although ethambutol is not known to be affected itself by any other drugs or to affect
other drugs, make sure your doctor knows if you are taking any other medicines.
Always tell your doctor or pharmacist about all the medicines you are taking. This
means medicines you have bought yourself as well as those you have on
prescription from your doctor.
Pregnancy and breast-feeding
You should not take this medicine if you are pregnant or breast-feeding, or if you are
trying for a baby, unless your doctor considers it essential. Speak to your doctor
before taking the tablets.
Driving and using machinery
Ethambutol can cause problems with eyesight, or tingling/numbness in hands or
feet. You should not drive or operate machinery if it has this effect on you.

3. HOW TO TAKE ETHAMBUTOL TABLETS
The tablets should be swallowed whole with a drink of water. They should be taken
as a single dose once a day.
The doctor will decide what dose of tablets you need to take. The dose varies from
person to person depending on age, weight and whether it is being used for
treatment or prevention of tuberculosis.
If you suffer from any kidney problems your doctor may do blood tests to check
whether you need to take a lower dose than usual.
Always take the tablets exactly as the doctor has told you. The dose will be on the
pharmacist’s label. If you are not sure, ask your doctor or pharmacist. Carry on
taking them for as long as you have been told unless you have any problems in
which case, check with your doctor.
Adults:
For prevention and first time treatment of tuberculosis: The usual dose is 15 mg per
kg of body weight each day.
Second time (or subsequent) treatment of tuberculosis: The usual dose is 25 mg per
kg of body weight each day for the first 60 days, reducing to 15 mg per kg of body
weight each day for as long as necessary.
Children:
For prevention of tuberculosis: The usual dose is 15 mg per kg of body weight each
day.
First time, second time (or subsequent) treatment of tuberculosis: The usual dose is
25 mg per kg of body weight each day for the first 60 days, reducing to 15 mg per kg
of body weight each day for as long as necessary.

Elderly:
The same dosages as for adults are usually used although reduced doses may be
required in the elderly who have kidney problems; in these patients the doctor will
carry out blood tests to determine the dose required.
If you take more tablets than you should
If you have accidentally taken more than the prescribed dose, contact your nearest
hospital casualty department or tell your doctor or pharmacist immediately.
Remember to take the pack and any remaining tablets with you.
If you forget to take a dose of Ethambutol Tablets
If you forget to take a dose, take it as soon as you remember, however, if this is
within a few hours of when your next dose is due, skip the missed dose and just
carry on with the normal routine. Do not take a double dose to make up for the
forgotten dose.
If you have any further questions on the use of this product, ask your doctor or
pharmacist.

4. POSSIBLE SIDE EFFECTS
Like all medicines, ethambutol can cause side effects, although not everybody gets
them.
Some side effects can be serious.
Stop taking Ethambutol Tablets and tell your doctor straightaway if you notice
the following effects:

The following other side effects have also been reported:
• stomach problems, including loss of appetite, feeling or being sick, diarrhoea,
flatulence (wind), stomach pain, metallic taste and weight loss
• fluid in the lungs or inflammation of the lungs which may cause breathlessness,
cough and raised temperature
• numbness, pins and needles, weakness in hands and feet, burning pain, shaking
• dizziness, confusion, disorientation, hallucinations, headache, fever, generally
feeling unwell, joint pains
• high levels of uric acid in the blood (may affect more than 1 in 10 people) which
may lead to gout (pain or swelling of the joints) in some people
If any of these side effects gets serious, or if you notice any side effects not
listed in this leaflet, please tell your doctor or pharmacist.

5. HOW TO STORE ETHAMBUTOL TABLETS
Keep out of the reach and sight of children.
Do not store above 25ºC. Keep your medicine in the pack in which it was given to
you. Do not transfer your medicine to another container.
Do not take this medicine after the expiry date (Exp.) stated. The expiry date refers
to the last day of that month.
Medicines should not be disposed of via wastewater or household waste. Ask your
pharmacist how to dispose of medicines no longer required. These measures will
help to protect the environment.

• sudden wheeziness, difficulty breathing, swelling of the face, eyes, lips or
throat, flushed appearance, irregular heartbeat. (These may be symptoms of a
severe allergic reaction)
• any changes or problems with your eyesight including blurred vision, eye pain or
colour blindness (may affect more than 1 in 100 people). Usually sight will return
to normal after stopping treatment with ethambutol, but in rare cases the problem
may take longer to return to normal or become permanent.
Tell your doctor straightaway if you notice any of the following effects:

6. FURTHER INFORMATION

• skin rash and itching, a condition known as Stevens-Johnson syndrome which
involves a skin rash, possibly with peeling and blistering and a sore mouth; other
skin problems including hard lumps, red patches often on the backs of arms and
hands and blisters or peeling
• you have pale stools, blood in your urine or your skin or whites of your eyes
become yellow (as these may be signs of a liver problem)
• you develop pain in the lower back or you experience difficulty or pain in urinating
(as these may be signs of a kidney problem)
• you notice any unusual bleeding, bruising or discoloured skin (as these may be
signs of a blood disorder).

What the medicine looks like and contents of the pack
Ethambutol 100 mg Tablets are yellow, round, film coated tablets.
Ethambutol 400 mg Tablets are grey, round, film coated tablets.
Each pack contains 56 tablets.

Ethambutol Tablets are available in two strengths containing either 100 mg or
400 mg ethambutol hydrochloride as the active ingredient.
The other ingredients are sodium starch glycolate, maize starch, povidone, colloidal
anhydrous silica, microcrystalline cellulose, magnesium stearate and colours
containing polydextrose, hypromellose, titanium dioxide (E171), macrogol and
yellow iron oxide (E172); the 400 mg tablets also contain black iron oxide (E172).

Marketing Authorisation Holder:
Neolab Limited, 57 High Street, Odiham, Hants, RG29 1LF.
Manufacturer: Fannin (UK) Limited, 57 High Street, Odiham, Hants, RG29 1LF.
Date leaflet revised: August 2012
PL 08137/0171 & PL 08137/0172
If you would like this leaflet in a different format, please
contact the licence holder at the above address.

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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.

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