Package Leaflet: Information for the User
Furosemide Alter 40 mg Tablets EFG
Read this package leaflet carefully before you start taking this medicine, because it contains important information for you.
Contents of the Package Leaflet
Furosemide Alter is a diuretic belonging to the group of sulfonamides. It works by increasing urine production (diuretic) and reducing blood pressure (antihypertensive).
Always under the prescription of your doctor, this medicine is indicated for the treatment of:
Read carefully the instructions provided in section 3. "How to take Furosemide Alter".
Do not take Furosemide Alter
If you are pregnant, see the "Pregnancy, breastfeeding, and fertility" section.
Warnings and precautions
Consult your doctor or pharmacist before starting to take Furosemide Alter. Be especially careful with this medicine:
During your treatment with this medicine, periodic monitoring of your blood levels of sodium, potassium, and creatinine will generally be required, and especially if you suffer from severe fluid loss due to vomiting, diarrhea, or intense sweating (dehydration or hypovolemia), as your doctor may require the interruption of treatment.
Elderly patients with dementia who are taking risperidone should be especially careful when taking this medicine. Risperidone is a medicine used to treat certain mental illnesses, such as dementia (a disease characterized by several symptoms: memory loss, speech problems, thinking problems).
Other medicines and Furosemide Alter
Tell your doctor or pharmacist if you are taking, have recently taken, or might take any other medicines. Some substances can increase their toxicity in the ear and kidney if administered with this medicine. Therefore, if they are administered together, it should be under strict medical control. These substances include:
Tell your doctor if you are being treated with medicines for:
This medicine and sucralfate should not be administered together, with an interval of less than 2 hours, as the effect of Furosemide Alter may be reduced.
This medicine can weaken the effect of other medicines such as:
It can also increase the action of other medicines such as:
Some medicines for inflammation and pain, for example, indomethacin (non-steroidal anti-inflammatory drugs, including acetylsalicylic acid) and medicines for epilepsy (phenytoin) can reduce the effect of Furosemide Alter.
Additionally, they can reduce the effect of Furosemide Alter or increase its adverse effects (by reducing the renal elimination of these medicines), medicines such as probenecid and methotrexate or other medicines that have significant secretion by the kidneys.
The following substances can reduce potassium levels in the blood (hypokalemia) if administered with Furosemide Alter:
Some electrolyte disturbances (for example, decreased potassium (hypokalemia) or magnesium (hypomagnesemia) levels in the blood) can increase the toxicity of some heart medicines (for example, digitalis and medicines that induce QT interval prolongation syndrome).
Some patients who receive high doses of cephalosporin-type antibiotics may experience a decrease in kidney function.
The combined administration of Furosemide Alter and cyclosporin A can produce gouty arthritis.
Those patients at high risk of nephropathy (kidney disease) due to contrast who receive Furosemide Alter may experience deterioration of kidney function.
The administration of Furosemide Alter together with risperidone in elderly patients with dementia could increase mortality.
Pregnancy, breastfeeding, and fertility
If you are pregnant or breastfeeding, think you may be pregnant, or plan to become pregnant, consult your doctor or pharmacist before using this medicine.
If you are pregnant, you will only use Furosemide Alter under strict medical indication.
During breastfeeding, Furosemide Alter should not be administered. If its administration is essential, your doctor may require you to interrupt breastfeeding, as Furosemide Alter passes into breast milk.
Driving and using machines
This medicine can cause dizziness or drowsiness. This can occur more frequently at the start of treatment, when your doctor increases the dose, or if you consume alcohol. Do not drive or operate tools or machines if you feel dizzy or drowsy.
Furosemide Alter contains lactose
If your doctor has told you that you have an intolerance to certain sugars, consult with them before taking this medicine.
Use in athletes
Patients should be warned that this medicine contains furosemide, which can produce a positive result in doping tests.
Follow exactly the administration instructions of this medicine indicated by your doctor or pharmacist. In case of doubt, consult your doctor or pharmacist again.
Remember to take your medicine.
Take Furosemide Alter on an empty stomach, swallowing it whole and with sufficient liquid.
If you think the action of this medicine is too strong or too weak, tell your doctor or pharmacist.
Your doctor will prescribe the lowest sufficient dose to produce the desired effect.
In adultsit is recommended to start treatment with half, one, or two tablets (20 to 80 mg of furosemide) daily. The maintenance dose is half to one tablet per day, and the maximum dose will be indicated by your doctor and will depend on your response to treatment.
Use in children
In infants and children, it is recommended to administer 2 mg/kg of body weight daily, up to a maximum of 40 mg per day.
Your doctor will indicate the duration of your treatment with this medicine. Do not stop your treatment before.
If you take more Furosemide Alter than you should
In case of overdose or accidental ingestion, consult your doctor or pharmacist immediately, go to the emergency department of the nearest hospital with this package leaflet, or call the Toxicology Information Service, phone 91 562 04 20, indicating the medicine and the amount ingested or administered.
An accidental overdose could lead to a severe drop in blood pressure (which can evolve into shock), kidney problems (acute renal failure), coagulation problems (thrombosis), delirium, flaccid paralysis of soft muscles (flaccid paralysis), apathy, and confusion. There is no specific antidote known. In cases of overdose, treatment will be based on symptoms.
If you forget to take Furosemide Alter
Do not take a double dose to make up for forgotten doses.
If you have any other doubts about the use of this medicine, ask your doctor or pharmacist.
Like all medicines, this medicine can cause side effects, although not everybody gets them.
Side effects have been grouped by frequency according to the following classification:
Very common: may affect more than 1 in 10 people
Common: may affect up to 1 in 10 people
Uncommon: may affect up to 1 in 100 people
Rare: may affect up to 1 in 1,000 people
Very rare: may affect up to 1 in 10,000 people
Frequency not known (cannot be estimated from available data).
Metabolic and nutritional disorders
Very common: electrolyte disturbances (including symptomatic ones), dehydration, and decreased total blood volume (hypovolemia), especially in elderly patients, elevated creatinine and triglyceride levels in the blood.
Common: decreased sodium (hyponatremia), chloride (hypochloremia), potassium (hypokalemia) levels, increased cholesterol and uric acid levels in the blood, gout attacks.
Uncommon: altered glucose tolerance. Latent diabetes mellitus may manifest.
Frequency not known: decreased calcium (hypocalcemia), magnesium (hypomagnesemia) levels, increased urea level in the blood, metabolic alkalosis, pseudo-Bartter syndrome in case of misuse and/or prolonged use of furosemide.
Vascular disorders
Rare: allergic inflammation of blood vessels (vasculitis). Frequency not known: alteration of blood coagulation (thrombosis).
Renal and urinary disorders
Common: increased urine volume. Rare: renal allergic reaction (interstitial nephritis).
Frequency not known: increased sodium and chloride levels in the urine, urine retention (in patients with partial obstruction of urine flow), kidney stone formation (nephrocalcinosis/nephrolithiasis) in premature infants, renal failure.
Gastrointestinal disorders
Uncommon: nausea.
Rare: vomiting, diarrhea.
Very rare: acute pancreatitis (inflammation of the pancreas).
Hepatobiliary disorders
Very rare: liver problem (cholestasis), increased liver enzymes (transaminases).
Ear and labyrinth disorders
Uncommon: hearing disorders, although transient, especially in patients with renal insufficiency, decreased protein levels in the blood (hypoproteinemia), and/or after too rapid intravenous administration of furosemide, deafness (sometimes irreversible).
Very rare: subjective sensation of ringing (tinnitus).
Skin and subcutaneous tissue disorders
Uncommon: itching, rash, blisters, and other more severe reactions such as erythema multiforme, pemphigoid, exfoliative dermatitis, purpura, and photosensitivity reaction.
Frequency not known: severe skin and mucous membrane reactions (Stevens-Johnson syndrome), severe skin disorder characterized by blistering and exfoliative lesions (toxic epidermal necrolysis), and acute generalized exanthematous pustulosis (AGEP) and drug hypersensitivity syndrome with eosinophilia and systemic symptoms (DRESS).
Immune system disorders
Rare: severe allergic reactions (anaphylactic or anaphylactoid) (e.g., with shock).
Nervous system disorders
Common: mental alterations in patients with liver problems (hepatic encephalopathy)
Rare: sensation of tingling in the limbs (paresthesias).
Frequency not known: dizziness, fainting, and loss of consciousness (caused by symptomatic hypotension).
Blood and lymphatic system disorders
Common: increased blood viscosity (hemoconcentration).
Uncommon: decreased platelet count (thrombocytopenia).
Rare: decreased white blood cell count (leukopenia), increased eosinophil count.
Very rare: decreased granulocyte count (agranulocytosis), decreased red blood cell count (aplastic anemia, hemolytic anemia).
Congenital, familial, and genetic disorders
Frequency not known: increased risk of persistent ductus arteriosus when furosemide is administered to premature infants during the first weeks of life.
General disorders and administration site conditions
Rare: fever.
Like other diuretics, after prolonged administration of this medicine, there may be an increase in the elimination of sodium, chloride, water, potassium, calcium, and magnesium. These disturbances manifest with intense thirst, headache, confusion, muscle cramps, painful contraction of the muscles, especially of the limbs (tetany), muscle weakness, alterations in heart rhythm, and gastrointestinal symptoms.
Reporting of side effects
If you experience any side effects, talk to your doctor or pharmacist. This includes any possible side effects not listed in this package leaflet. You can also report them directly through the Spanish Pharmacovigilance System for Human Use Medicines: https://www.notificaram.es. By reporting side effects, you can help provide more information on the safety of this medicine.
Keep this medicine out of the sight and reach of children.
This medicine does not require special storage conditions.
Do not use this medicine after the expiration date stated on the packaging after EXP. The expiration date is the last day of the month indicated.
Medicines should not be disposed of via wastewater or household waste. Place the packaging and any unused medicines in the SIGRE collection point at your pharmacy. If in doubt, ask your pharmacist how to dispose of packaging and medicines you no longer need. This will help protect the environment.
Furosemida Alter Composition
Product Appearance and Package Contents
White or almost white, round tablets, approximately 7 mm in diameter, flat, with beveled edges, engraved with "40" on one side and scored on the other. The tablet can be divided into equal doses.
Green-Aluminum (standard and unit-dose) PVC blisters. Containers holding 30 tablets.
Only some package sizes may be marketed.
Marketing Authorization Holder
Laboratorios Alter, S.A.
C/ Mateo Inurria 30
28036 Madrid
Spain
Manufacturer
Zydus France ZAC
Les Hautes Patures
Parc d'activités des Peupliers
25 Rue des Peupliers
92000 Nanterre
France
Or
Centre Spécialités Pharmaceutiques
ZAC des Suzots
35 rue de la Chapelle
63450 Saint Amant Tallende
France
Date of Last Revision of this Leaflet: April 2024
Detailed and updated information on this medication is available on the website of the Spanish Agency for Medicines and Health Products (AEMPS): http://www.aemps.gob.es.
The average price of FUROSEMIDE ALTER 40 mg TABLETS in October, 2025 is around 1.06 EUR. Prices may vary depending on the region, pharmacy, and whether a prescription is required. Always check with a local pharmacy or online source for the most accurate information.