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Package leaflet: Information for the patient

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, 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:
What Furosemide Tablets are and what they are used for
What you need to know before you take Furosemide Tablets
How to take Furosemide Tablets
Possible side effects
How to store Furosemide Tablets
Contents of the pack and other information

What Furosemide Tablets are and what they are used for

Furosemide belongs to a group of medicines called "diuretics". Diuretics make you pass more water
Excess fluid can build up in certain conditions which affect the heart, lungs, kidneys or liver.
Furosemide Tablets are used to remove that fluid by making you pass more water.
It may also be used when your kidneys are not functioning properly and not producing normal
amounts of urine, or to treat swelling in your lower legs, feet and ankles due to high blood pressure,
alone or in combination with other medicines.

What you need to know before you take Furosemide Tablets

Do not take Furosemide Tablets if:

You are allergic to furosemide or any of the other ingredients of this medicine (listed in section

You know you are allergic to the antibiotics known as sulfonamides or sulfonamide related
drugs, eg trimethoprim, sulfadiazine, or amiloride

You have very low levels of potassium, sodium or other electrolytes in your blood or low blood
volume (your doctor will be able to advise you)

You are dehydrated

You have low blood pressure

You are taking potassium supplements or potassium sparing diuretics for high blood pressure
(e.g. spironolactone, amiloride)

You have severe kidney damage which has stopped them functioning and producing urine

You have liver cirrhosis or hepatic encephalopathy

You have Addison’s disease (a disorder of the adrenal glands)

You have a blood disorder called porphyria which can affect the skin and nervous system

You are suffering from digitalis toxicity (harmful effects of the drug digoxin)

You are breastfeeding.
Warnings and precautions
Talk to your doctor or pharmacist before taking Furosemide Tablets if:

You have difficulty in passing water, for example because of an enlarged prostate gland (males

You have been told that you have a low volume of fluid in the body or a low blood pressure

You have low levels of protein in the blood as a result of kidney damage
You have diabetes or any disease of the adrenal glands
You have any problems with your liver, kidneys or heart
You have gout (causes excess uric acid in the blood and painful inflammation of the joints,
mainly in the feet and hands and especially in the big toe)
You are elderly, if you are on other medications which can cause the drop of blood pressure and
if you have other medical conditions that are risks for the drop of blood pressure
You are about to undergo any blood or urine tests.

Other medicines and Furosemide Tablets
Tell your doctor or pharmacist if you are taking, have recently taken or might take any other medicines

Antibiotics (for infection) such as cephalothin, trimethoprim, gentamycin and neomycin.

Digoxin used to increase the force of the heart muscle, and medicines to correct abnormal heart
beats, eg amiodarone

Tablets for high blood pressure (including medicines called ACE inhibitors such as captopril,
angiotensin II receptor antagonists e.g. valsartan, hydralazine, aliskiren, metolazone, thiazides)

Lithium or reboxetine (for depression)

Non steroidal anti-inflammatory drugs (to relieve pain or inflammation in the joints, or to lower
a high temperature) such as ibuprofen and piroxicam

Corticosteroids (such as prednisolone) for allergic or inflammatory conditions such as asthma or

Medicines for diabetes, eg insulin

Aspirin related drugs (known as salicylates)

Medicines used to treat asthma e.g. theophylline, salbutamol

Antihistamines, eg cetirizine

Colestyramine or colestipol (for high cholesterol)

Ciclosporin (used in organ transplants)

Drosperinone (used in birth control pills and hormone replacement therapy)

Sucralfate (for stomach ulcers)

Phenytoin or carbamazepine (to treat epilepsy)

Aminoglutethimide, cisplatin, aldesleukin or methotrexate (to treat cancer)

Medicines or foods containing liquorice

Laxatives used over a long period of time

Probenecid (to treat gout)

Drugs to treat mental illness (e.g. pimozide, amisulpride, sertindole or phenothiazines5)

Moxisylyte for Raynaud’s syndrome

Nitrates for angina

Chloral hydrate or triclofos for insomnia

Drugs for ADHD (attention defecit hyperactivity disorder)

Levodopa for Parkinson’s disease

Baclofen, tizanidine (muscle relaxants)

Oral contraceptives

Alprostadil for erectile dysfunction

Tacrolimus (for eczma)

If you are about to undergo a procedure where curare-type muscle relaxing drugs such as
tubocurarine or anaesthetics may be used, tell the doctor or dentist.
Furosemide Tablets with alcohol
You should avoid drinking alcohol while taking Furosemide Tablets as this may lower your blood
pressure further.
Pregnancy and breast-feeding
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.
Driving and using machines

Furosemide may cause some patients to be less alert which could interfere with the ability to drive or
to operate machines. If you notice that you are not as alert as usual, do not drive or operate machinery
and ask your doctor for advice.
Furosemide Tablets contain lactose
This medicine contains lactose. If you have been told by your doctor that you have an intolerance to
some sugars, contact your doctor before taking this medicine.
Whilst you are receiving treatment with this medicine, your doctor may want to take blood for testing
which will show if you have the right balance of fluid and chemicals in the body.

How to take Furosemide Tablets

Furosemide Tablets 20mg are to be taken by mouth.
Always take this medicine exactly as your doctor or pharmacist has told you. Check with your doctor
or pharmacist if you are not sure.
The recommended dose is:
Adults and children over 12 years:
Water retention: The initial dose is 40mg in the morning, reduced to 20mg daily or 40mg on
alternate days, depending on how you respond. In some patients 80mg daily or higher (in divided
doses) may be required.
Hypertension: 20–40mg twice a day.
Elderly: Furosemide is generally cleared from the body more slowly in the elderly. If you are elderly,
your doctor may decide to start with a low dose and increase the dose gradually according to your
Children under 12 years: The doctor will decide on the dosage, depending on how severely the
kidneys are affected and on the response to initial doses. The usual dose is 1–3mg/kg bodyweight
daily up to a maximum of 40mg daily. A more suitable dosage form e.g. oral solution may be
Dosage adjustment may be necessary in patients with:
- Hypoproteinaemia
- Liver congestion/dysfunction.
If you take more Furosemide 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 know exactly what you have taken.
If you forget to take Furosemide Tablets:
If you miss a dose, wait until your next dose. Do not take the dose you have missed. You can then
carry on as before. Do not take a double dose to make up for a forgotten dose.

Possible side effects

Like all medicines, this medicine can cause side-effects, although not everybody gets them.
If you notice any of the following effects tell your doctor immediately:

Serious allergic reaction which may cause wheeziness, difficulty in breathing or dizziness,
swelling of the eyelids, face, lips or throat, rash or itching, sensitivity to sunlight or UV lamps,
blistering, swelling or peeling of the skin

Inflammation of blood vessels, often with skin rash
Blood clot (causing pain, swelling and tenderness)
Kidney inflammation which can cause swollen ankles or high blood pressure.

If you notice any of the following effects tell your doctor or pharmacist:
Very common: may affect more than 1 in 10 people

Dehydration, low blood levels of sodium, potassium, chlorine, calcium or magnesium –
symptoms include muscle weakness, cramps or twitching, abnormal heart rhythm, tiredness,
light-headedness, confusion, fits, coma, numbness and/or tingling in the hands, feet or lips,
feeling and being sick

Low blood pressure which may cause loss of concentration and slowed reactions, lightheadedness, sensation of pressure in the head, headache, dizziness, drowsiness, weakness,
problems with vision, dry mouth, feeling faint when standing up.
Common: may affect up to 1 in 10 people

Low blood volume

Increased levels of creatinine or blood urea (seen in blood tests).
Uncommon: may affect up to 1 in 100 people

Severe reduction in blood cells which can cause weakness, bruising or make infections more

Changes in glucose, cholesterol or uric acid levels (seen in tests)

Gout (causing a swollen painful joint or joints)

Changes in vision including blurred or yellow vision

Deafness (sometimes irreversible)

Dizziness when standing

Irregular heartbeat

Dry mouth, thirst, feeling or being sick, changes in bowel movements including diarrhoea and

Muscle cramps or weakness

Reduction in the amount of urine excreted, problems urinating or urinary incontinence

Rare: may affect up to 1 in 1,000 people

Inflammation of the pancreas which causes severe pain in the abdomen and back

A reduction of the blood cells in the bone marrow or changes in white blood cell levels causing
tiredness, unexplained bruising, paleness, infections and when more severe fever and abdominal

Psychiatric disorder causing delusions, hallucinations, disorganised speech

“Pins and needles”/tingling sensation

Confusion, headache

Ringing in the ears

Yellowing of the skin or whites of the eyes caused by liver or blood problems

Kidney failure

Generally feeling unwell, fever

Increased blood transaminase levels (seen in tests).
Very rare: may affect up to 1 in 10,000 people

Severe reduction in number of white blood cells which makes infections more likely, or
reduction in red blood cells which can make the skin pale yellow and cause weakness or
breathlessness, or reduction in blood platelets which increases risk of bleeding or bruising

Involuntary muscle contractions.
Not known: frequency cannot be estimated from the available data

Hives (itchy red weals), blue/black spots/pinpoint bleeding under the skin

Acute generalised exanthematous pustulosis (AGEP) (acute febrile drug eruption)

Dizziness, fainting and loss of consciousness (caused by symptomatic hypotension)
Worsening of metabolic alkalosis, changes in fluid and electrolyte levels, or decreased
potassium levels in the body.

Additional side effects in children

Kidney stones in infants

Persistence of patent ductus arteriosus.
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.

How to store Furosemide Tablets

Keep this medicine out of the sight and reach of children.
Do not use this medicine after the expiry date which is stated on the pack.
Do not store above 25ºC. Protect from light.
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 environment.

Contents of the pack and other information

What Furosemide Tablets contain
The active substance is Furosemide. Each tablet contains 20mg furosemide.
The other ingredients are lactose, starch, magnesium stearate, povidone, sodium starch glycolate.
What Furosemide Tablets look like and contents of the pack
The tablets are white and round and engraved with F20 and a breakline on one side.
This medicine is available in pack sizes of 100, 250, 500 or 1000 tablets. Not all pack sizes may be
Marketing Authorisation Holder and Manufacturer
Marketing Authorisation Holder: Dalkeith Laboratories Ltd, 2 Park Street, Woburn,
Bedfordshire, MK17 9PG, UK
Manufacturer: Goldshield Pharmaceuticals Ltd, NLA Tower, 12-16 Addiscombe Road, Croydon
This leaflet was last revised in March 2017


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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.