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Erythrocin® 500mg Tablets
Erythromycin 500mg Tablets
(erythromycin stearate)
Your medicine is known by one of the above names, but will be referred to as
Erythrocin Tablets throughout this:
Patient Information Leaflet
Read all of this leaflet carefully before you start taking this medicine.
• Please 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 becomes severe, or if you notice any side
effects not listed in this leaflet, please tell your doctor or pharmacist.
In this leaflet:
1) What Erythrocin Tablets are and what they are used for
2) Before you take Erythrocin Tablets
3) How to take Erythrocin Tablets
4) Possible side effects
5) How to store Erythrocin Tablets
6) Further information

1) What Erythrocin Tablets are and what they are used for
Erythrocin contains the active ingredient erythromycin which belongs to a
group of medicines called macrolide antibiotics.
Erythrocin Tablets are used to prevent and treat infections such as:
• Throat and sinus infections
• Chest infections, such as bronchitis and pneumonia
• Ear infections
• Mouth and dental infections
• Eye infections
• Skin and tissue infections, such as acne
• Stomach and intestinal infections
• Prevention of infection following burns, operations or dental procedures
• Other infections, such as sexually transmitted diseases, bone infections
or scarlet fever.

2) Before you take Erythrocin Tablets
You should not receive Erythrocin Tablets if you:
• have been told that you are allergic to erythromycin or other macrolide
antibiotics such as clarithromycin or azithromycin or any of the other
ingredients in these tablets;
• are currently taking a medicine called
are taking ergotamine or dihydroergotamine (used to treat migraines)
while taking erythromycin as this may cause serious side effects;
are taking terfenadine or astemizole or mizolastine (widely taken for
hayfever and allergies), domperidone (for nausea (feeling sick) and
vomiting (being sick)), cisapride (for stomach disorders) or pimozide
or amisulpride (for psychiatric conditions) while receiving
erythromycin, as combining these drugs can sometimes cause
serious disturbances in heart rhythm. Consult your doctor for advice
on alternative medicines you can take instead;
simvastatin (used to lower cholesterol and triglycerides (types of fat)
in the blood);
tolterodine (used for treating overactive bladder with symptoms of
urinary frequency, urgency, and leakage);
• are taking colchicine (used for treatment of gout and arthritis) whilst taking
erythromycin as this may cause serious side effects;
• you are taking can cause liver problems;
• have previously experienced diarrhoea following the use of antibiotics;

are pregnant and have been told that you have a sexually transmitted
disease called syphilis. In this case erythromycin may not be effective for
preventing the transfer of this infection to your baby. Consult your doctor
before receiving erythromycin. Alternatively if you were treated for early
stages of syphilis during your pregnancy, and your child is under 1 year
and is prescribed erythromycin, consult your doctor before giving
erythromycin to your child;
are treating a young child with antibiotics and they are irritable or vomit
when fed, you should contact your physician immediately;
suffer from a condition called myasthenia gravis, which causes muscle
weakness, consult your doctor before receiving erythromycin;
are taking erythromycin with ‘statins’ such as simvastatin or lovastatin
(used to lower cholesterol) as serious side effects can occur.

If any of these apply to you, or if you are not sure, tell your doctor.
Taking other medicines
Please tell your doctor if you are taking, or have recently taken any other
medicines, including any medicines obtained without a prescription.
This is especially important if you are taking medicines from the following
• astemizole, terfenadine or mizolastine (used to treat allergies such as
• domperidone (used to treat nausea (feeling sick) and vomiting (being sick));
• pimozide (used to treat mental problems);
• ergotamine or dihydroergotamine (used to relieve migraine);
• cisapride (used to treat stomach disorders);
• statins (used to help lower cholesterol levels e.g. lovastatin and
• protease inhibitors (used to treat viral infections e.g. saquinavir);
• oral contraceptives.
This is also important if you are taking medicines called:
• colchicine (used to treat gout and arthritis);
• cimetidine and omeprazole (used to treat acid reflux and other related
• clarithromycin, rifabutin, or rifampicin (medicines used to treat different
types of bacterial infection);
• fluconazole, ketoconazole and itraconazole (medicines used to treat fungal
• digoxin, quinidine or disopyramide (used to treat heart problems);
• cilostazol (a medicine used to treat peripheral circulation problems);
• hexobarbitone, phenobarbital or midazolam (used as sedatives);
• warfarin and acenocoumarol (used to help thin the blood);
• valproate, carbamazepine or phenytoin (used to control epilepsy);
• theophylline (used to treat asthma and other breathing problems);
• ciclosporin or tacrolimus (used following organ transplants);
• bromocriptine (used to treat Parkinson’s disease);
• zopiclone or triazolam/alprazolam (used to help you sleep or relieve states
of anxiety);
• alfentanil (a medicine used to provide pain relief);
• methylprednisolone (used to help suppress the body's immune system –
this is useful in treating a wide range of conditions);
• St John’s Wort (a herbal medicine used to treat depression);
• verapamil (used to treat high blood pressure and chest pain);
• vinblastine (used to treat certain types of cancer);
• sildenafil (used to treat erectile dysfunction).

If you or your child goes for any medical tests, tell your doctor that you are
taking Erythrocin Tablets, as this may interfere with some test results.
Pregnancy and breast-feeding
Erythromycin should be used by women during pregnancy only if clearly
If you are pregnant or think you may be pregnant, or if you are breast-feeding,
please consult your doctor before taking this medicine.

3) How to take Erythrocin Tablets

vertigo (problems with balance that can result in feelings of dizziness or
sickness – particularly on standing);
hallucinations (seeing or hearing things that aren’t there);
feeling generally unwell (malaise);
inflammation of the kidneys (a condition known as interstitial nephritis);
low blood pressure;
serious skin rashes that may involve blistering and can cover large areas
of the torso, face and limbs (conditions known as Stevens Johnson
syndrome, toxic epidermal necrolysis and erythema multiforme);
vomiting and irritability in young children between the age of 1 month and
12 months;
visual impairment/blurred vision (Mitochondrial optic neuropathy).

Always take Erythrocin Tablets exactly as your doctor has told you.
You should check with your doctor if you are not sure.

The usual dose of Erythrocin Tablets for adults and children over 8 years is:

1-2 g daily in divided doses i.e. four to eight 250 mg tablets daily or two to four
500 mg tablets daily, taken just before or with meals or food. If you have a
bad infection you may be told to take up to 4 g daily.

Reporting of side effects
If you get any side effects, talk to your doctor, pharmacist or nurse. 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.

Continue to take this medicine until the course is completed or until your
doctor tells you to stop; do not stop taking your medicine, even if you feel
better. If you stop the treatment too early your problem could come back.
If you take more Erythrocin Tablets than you should
If you accidentally take more medicine in one day than your doctor has told
you to, or if a child has taken some of the medicine by mistake, contact your
doctor or go to your nearest hospital emergency department immediately. An
overdose of Erythrocin could cause temporary hearing loss, nausea, vomiting
and diarrhoea.

5) How to store Erythrocin Tablets

Keep all medicines out of the sight and reach of children.
Do not take your tablets after the expiry date printed on the carton, or
blister label. The expiry date refers to the last day of that month
Do not store above 30°C. Protected from light.
If the tablets become discoloured or shows any other signs of
deterioration, you should seek the advice of your pharmacist who will tell
you what to do.
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.

If you forget to take Erythrocin Tablets
If you forget to take a dose of your medicine, take it as soon as you
remember. Do not take more medicine in one day than your doctor tells you

If you have any further questions on the use of this product ask your doctor or

6) Further information

4) Possible side effects
Like all medicines, Erythrocin Tablets can cause side effects, although not
everybody gets them.
If you notice any of the following, contact your doctor immediately:
• difficulty breathing;
• fainting;
• swelling of the face, lips or throat;
• skin rashes;
• severe skin reactions including large fluid-filled blisters, sores and ulcers;
• ulcers in the mouth and throat, as these may be signs of an allergic
Other side effects of Erythrocin include:
• diarrhoea which may be severe or prolonged and may contain blood or
• feeling sick or being sick;
• increase in a particular type of white blood cells (eosinophilia);
• stomach pains; these may be a symptom of an inflamed pancreas
• ringing in the ears (tinnitus);
• reversible loss of hearing (usually associated with high doses or in
patients with kidney problems);
• various liver or gall-bladder problems, which can cause yellowing of the
skin and/or eyes (jaundice) or pale stools with dark urine;
• chest pains;
• abnormal heart rhythms (including palpitations);
• fever;
• anorexia;
• confusion;
• fits (seizures);

What Erythrocin Tablets contains:
Each film-coated tablet contains 500mg of the active ingredient erythromycin
as the stearate.
Erythrocin Tablets also contain the following ingredients: magnesium
hydroxide, povidone, maize starch, polacrilin potassium,
hydroxypropylmethylcellulose, polyethylene glycol 400 & 8000.
What Erythrocin Tablets looks like and contents of the pack
Erythrocin Tablets are white, film-coated, capsule-shaped and plain on both
Erythrocin Tablets are available as blister packs of 12 tablets.
PL 10383/0691


Who makes and repackages your medicine?
Your medicine is manufactured by Farmar ABEE, Attikis, Greece. Procured
from within the EU and repackaged by Product Licence Holder Primecrown
Ltd, 4/5 Northolt Trading Estate, Belvue Road, Northolt, Middlesex, UB5 5QS.
Leaflet date: 25.08.2017
Erythrocin® is a trade mark of Abbott Laboratories, USA.

Blind or partially sighted?
Is this leaflet hard to see or read?
Call 020 8839 3000 to obtain the
leaflet in a format suitable for you.

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Further information

Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.