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Active substance(s): ATENOLOL / ATENOLOL

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2. What you need to know before you take Atenolol Tablets


Do not take this medicine if:
• You are allergic to atenolol or any of the other ingredients of this medicine (listed in section 6).
• You have ever had any of the following heart problems:
- heart failure which is not under control (this usually makes you breathless and causes your
ankles to swell)
- second- or third-degree heart block (a condition which may be treated by a pacemaker)
- very slow or very uneven heart beats, very low blood pressure or very poor circulation.
• You have a tumour called phaeochromocytoma that is not being treated. This is usually near
your kidney and can cause high blood pressure. If you are being treated for
phaeochromocytoma, your doctor will give you another medicine, called an alpha-blocker, to
take as well as Atenolol.
• You have been told that you have higher than normal levels of acid in your blood (metabolic

Read all of this leaflet carefully before you start taking this medicine because it contains
important information for you.
• Keep this leaflet. You may need to read it again.
• If you have any further questions, please ask your doctor or pharmacist.
• This medicine has been prescribed for you only. Do not pass it on to others. It may harm them,
even if their signs of illness are the same as yours.
• If you get any side effects, talk to your doctor or pharmacist. This includes any possible side
effects not listed in this leaflet. See section 4.
What is in this leaflet:
1. What Atenolol Tablets are and what they are used for
2. What you need to know before you take Atenolol Tablets
3. How to take Atenolol Tablets
4. Possible side effects
5. How to store Atenolol Tablets
6. Contents of the pack and other information

1. What Atenolol Tablets are and what they are used for
This medicine contains an active substance called Atenolol. Atenolol belongs to a group of
medicines called beta blockers.
Atenolol is used to:
• Treat high blood pressure (hypertension).
• Treat uneven heart beats (arrhythmias).
• Help prevent chest pain (angina).
• Protect the heart in the early treatment after a heart attack (myocardial infarction).
It works by making your heart beat more slowly and with less force.

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Do not take this medicine if any of the above apply to you. If you are not sure, talk to your doctor
or pharmacist before taking this medicine.

Other medicines and Atenolol tablets
Tell your doctor or pharmacist if you are taking, or have recently taken or might take any other
medicines. This includes medicines that you buy without prescription and herbal medicines. This
is because Atenolol can affect the way some other medicines work and some medicines can have
an effect on Atenolol.

Important information about some ingredients of this medicine
• Atenolol 50 mg and 100 mg Tablets contain lactose monohydrate. If you have been told by
your doctor that you have an intolerance to some sugars, contact your doctor before taking this

3. How to take Atenolol Tablets
In particular, tell your doctor if you are taking any of the following medicines:
• Clonidine (for high blood pressure or migraine). If you are taking clonidine and Atenolol
together, do not stop taking clonidine unless your doctor tells you to do so. If you have to stop
taking clonidine, your doctor will give you careful instructions about how to do it.
• Disopyramide, quinidine or amiodarone (for an uneven heart beat).
• Verapamil, diltiazem and nifedipine (for high blood pressure or chest pain)
• Digoxin (for heart problems).
• Adrenaline, also known as epinephrine (a medicine that stimulates the heart).
• Ibuprofen or indometacin (for pain and inflammation).
• Insulin or medicines that you take by mouth for diabetes.
• Medicines to treat nose or sinus congestion or other cold remedies (including those you can
buy in the pharmacy).

Always take this medicine exactly as your doctor has told you. Check with your doctor or pharmacist
if you are not sure.
• Your doctor will tell you how many tablets to take each day and when to take them.
Read the label on the carton to remind you what the doctor said.
• Swallow your Atenolol tablet whole with a drink of water.
• Try to take your tablet at the same time each day.
The recommended dose is:
• High blood pressure (hypertension): 50 mg to 100 mg a day.
• Chest pain (angina): 100 mg a day or 50 mg twice a day.

Warnings and precautions
Talk to your doctor or pharmacist before taking this medicine if:
• You have asthma, wheezing or any other similar breathing problems, or you get allergic
reactions, for example to insect stings. If you have ever had asthma or wheezing, do not
take this medicine without first checking with your doctor.
• You have a type of chest pain (angina) called Prinzmetal’s angina.
• You have poor blood circulation or controlled heart failure.
• You have first-degree heart block.
• You have diabetes. Your medicine may change how you respond to having low blood sugar.
You may feel your heart beating faster.
• You have thyrotoxicosis (a condition caused by an overactive thyroid gland). Your medicine
may hide the symptoms of thyrotoxicosis such as a fast heartbeat, tremor or excessive sweating.
• You have problems with your kidneys. You may need to have some check ups during your

If you go into hospital to have an operation, tell the anaesthetist or medical staff that you are taking
Atenolol tablets. This is because you can get low blood pressure (hypotension) if you are given
certain anaesthetics while you are taking Atenolol.

• Uneven heart beats (arrhythmias): 50 mg to 100 mg a day.

Pregnancy, breast-feeding and fertility
If you are pregnant or breast-feeding, think you may be pregnant or are planning to have a baby,
ask your doctor or pharmacist for advice before taking this medicine.

If you are an elderly person, your doctor may decide to give you a lower dose, particularly if you
have problems with your kidneys.

Driving and using machines
• Your medicine is not likely to affect you being able to drive or use any tools or machines.
However, it is best to wait to see how your medicine affects you before trying these activities.
• If you feel dizzy or tired when taking this medicine, do not drive or use any tools or machines.

People with severe kidney problems
If you have severe kidney problems your doctor may decide to give you a lower dose.

• The early treatment of a heart attack (myocardial infarction): 50 mg to 100 mg a day.

Use in Children:
This medicine must not be given to children

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If you forget to take Atenolol Tablets
If you forget to take a dose, take it as soon as you remember. However, if it is almost time for the
next dose, skip the missed dose. Do not take a double dose to make up for a forgotten dose.
If you stop taking Atenolol Tablets
Do not stop taking Atenolol tablets without talking to your doctor. In some cases, you may need to
stop taking it gradually.

4. Possible side effects
Like all medicines, this medicine can cause side effects, although not everybody gets them.
Stop taking Atenolol tablets and see a doctor or go to hospital straight away if you notice
any of the following serious side effects:
Allergic reactions:
• If you have an allergic reaction, see a doctor straight away. The signs may include raised lumps
on your skin (weals), or swelling of your face, lips, mouth, tongue or throat.
Other possible side effects:
Common (may affect up to 1 in 10 people)
• You may notice that your pulse rate becomes slower while you are taking the tablets. This is
normal, but if you are concerned please tell your doctor about it.
• Cold hands and feet.
• Diarrhoea.
• Feeling sick (nausea).
• Feeling tired.
Uncommon (may affect up to 1 in 100 people)
• Disturbed sleep.

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Rare (may affect up to 1 in 1,000 people)
• Heart block (which can cause dizziness, abnormal heart beat,tiredness or fainting).
• Numbness and spasm in your fingers which is followed by warmth and pain (Raynaud’s disease).
• Mood changes.
• Nightmares.
• Feeling confused.
• Changes in personality (psychoses) or hallucinations.
• Headache.
• Dizziness (particularly when standing up).
• Tingling of your hands.
• Being unable to get an erection (impotence).
• Dry mouth.
• Dry eyes.
• Disturbances of vision.
• Thinning of your hair.
• Skin rash.
• Reduced numbers of platelets in your blood (this may make you bruise more easily).
• Purplish marks on your skin.
• Jaundice (causing yellowing of your skin or the whites of your eyes).
Very rare (may affect up to 1 in 10,000 people)
• Changes to some of the cells or other parts of your blood. Your doctor may take blood samples
every so often to check whether Atenolol has had any effect on your blood.

• Poor circulation.
Reporting of side effects
If you get any side effects, talk to your doctor or pharmacist. This includes any possible side effects
not listed in this leaflet. You can also report side effects directly via the Yellow Card Scheme at By reporting side effects, you can help provide more information on
the safety of this medicine.

5. How to store Atenolol Tablets
• Keep this medicine out of the sight and reach of children.
• Do not use your tablets after the expiry date which is stated on the carton {EXP}. The expiry
date refers to the last day of that month.
• Store below 250C in the original package.
• Do not throw away any medicines via wastewater or household waste. Ask your pharmacist
how to throw away medicines you no longer use. These measures will help protect the

tablets. Not all pack sizes may be marketed.
Marketing Authorisation Holder and Manufacturer
Name and address:
Bristol Laboratories Ltd,
Unit 3, Canalside, Northbridge Road,
Berkhamsted, Hertfordshire,
HP4 1EG, United Kingdom
0044 (0)1442 200922
0044 (0)1442 873717
Atenolol 50 mg Film-coated Tablets; PL 17907/0094
Atenolol 100 mg Film-coated Tablets; PL 17907/0095
This leaflet was last revised in September 2016
To request a copy of this leaflet in Braille, large print or audio format, please contact the licence
holder at the address (or telephone, fax, email) above.

6. Contents of the pack and other information

Not known (frequency cannot be estimated from the available data)
• Lupus-like syndrome (a disease where the immune system produces antibodies that
attacks mainly skin and joints).

What Atenolol Tablets contain
• The active substance is atenolol. Each tablet contains 50 mg or 100 mg of atenolol.
• The other ingredients are
Tablet Core: Microcrystalline cellulose, Lactose monohydrate, Sodium starch glycolate
(Type A), Magnesium stearate, Sodium lauryl sulfate and Colloidal anhydrous silica.
Film coating: Opadry white 03F180011 containing Hypromellose, Titanium dioxide (E171),
Macrogol 8000.

Conditions that may get worse
If you have any of the following conditions, they may get worse when you start to take your
medicine. This happens rarely affecting less than 1 in 1,000 people.
• Psoriasis (a skin condition).
• Being short of breath or having swollen ankles (if you have heart failure).
• Asthma or breathing problems.

What Atenolol Tablets look like and contents of the pack.
• Atenolol 50 mg Tablets are white to off-white, circular, film-coated tablet with convex sides,
plain on one side and marked A over 50 on the other side.
• Atenolol 100 mg Tablets are white to off-white, circular, film-coated tablets with convex sides,
plain on one side and marked A over 100 on the other side.
• The tablets are available in PVC/PVdC/aluminium blister packs containing 28, 30, 56 and 60

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If you take more Atenolol Tablets than you should
If you take more Atenolol Tablets than prescribed by your doctor, talk to a doctor or go to a hospital
straight away. Take the medicine pack with you so that the tablets can be identified.

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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.