METFORMIN STADAFARMA 850 mg FILM-COATED TABLETS

2. What you need to know before you take Metformin Stadafarma

Do not take Metformin Stadafarma

• If you are allergic (hypersensitive) to metformin or any of the other ingredients of this medicine (listed in section 6)
• If you have liver problems
• If you have severe kidney function impairment
• If you have uncontrolled diabetes with, for example, severe hyperglycemia (high blood sugar), nausea, vomiting, diarrhea, rapid weight loss, lactic acidosis (see "Risk of lactic acidosis" below) or ketoacidosis. Ketoacidosis is a disorder in which substances called "ketone bodies" accumulate in the blood, which can lead to a pre-diabetic coma. Symptoms include stomach pain, rapid and deep breathing, drowsiness or an unusual fruity odor of your breath
• If you have lost a lot of water from your body (dehydration), for example, due to prolonged or severe diarrhea, or if you have vomited several times in a row. Dehydration can trigger kidney problems, which can put you at risk of developing lactic acidosis (see "Warnings and precautions")
• If you have a severe infection, for example, an infection that affects your lungs, bronchi, or kidneys. Severe infections can trigger kidney problems, which can put you at risk of developing lactic acidosis (see "Warnings and precautions")
• If you are receiving treatment for acute heart failure or if you have recently had a heart attack, if you have severe circulation problems (such as shock) or if you have difficulty breathing. This can lead to a lack of oxygenation in the tissues, which can put you at risk of developing lactic acidosis (see "Warnings and precautions" below)
• If you drink a lot of alcohol

If any of the above applies to you, consult your doctor before starting to take this medicine.

Make sure to consult your doctor if:

• you need an examination such as an X-ray or a scan that involves injecting a contrast medium into your blood that contains iodine.
• you need major surgery.

You should stop taking metformin for a certain period before and after the examination or surgery. Your doctor will decide if you need any other treatment during this time. It is essential that you follow your doctor's instructions precisely.

Warnings and precautions

Stop taking metformin and contact a doctor or the nearest hospital immediately if you experience any of the symptoms that lactic acidosis produces, as this disorder can lead to a coma.

The symptoms of lactic acidosis include:

• vomiting
• stomach pain (abdominal pain)
• muscle cramps
• general feeling of discomfort, with intense fatigue
• difficulty breathing
• reduced body temperature and heart rate

Lactic acidosis is a medical emergency and should be treated in a hospital.

Stop taking metformin for a short period if you have a disorder that may be associated with dehydration(significant loss of body fluids), such as severe vomiting, diarrhea, fever, heat exposure, or if you drink less fluid than usual. Consult your doctor for further instructions.

Consult your doctor quickly if:

• You know you have a genetic disorder that affects the mitochondria (the energy-producing components within cells), such as MELAS syndrome (mitochondrial encephalomyopathy, myopathy, lactic acidosis, and stroke-like episodes) or maternally inherited diabetes and deafness (MIDD).

• You experience any of the following symptoms after starting treatment with metformin: seizure, cognitive impairment, difficulty with body movements, symptoms indicative of nerve damage (e.g., pain or numbness), migraine, and hearing loss.

Please note the following

• If you need to undergo major surgery, you should stop taking metformin during the procedure and for a period after it. Your doctor will decide when you should stop taking metformin and when you can restart it.

• Metformin alone does not cause hypoglycemia (a blood sugar concentration that is too low). However, if you take metformin with other diabetes medicines that can cause hypoglycemia (such as sulfonylureas, insulin, meglitinides), there is a risk of hypoglycemia. If you experience symptoms of hypoglycemia, such as weakness, dizziness, increased sweating, increased heart rate, vision disturbances, or difficulty concentrating, it is usually helpful to eat or drink something that contains sugar.

• During treatment with metformin, your doctor will check your kidney function at least once a year or more frequently if you are an elderly person and/or if your kidney function is worsening.

Other medicines and Metformin Stadafarma

If you need to be given an injection of a contrast medium that contains iodine into your bloodstream, for example, in the context of an X-ray or scan, you should stop taking metformin before the injection or at the time of the injection. Your doctor will decide when you should stop taking metformin and when you can restart it.

Tell your doctor if you are taking, have recently taken, or might take any other medicines. You may need more frequent blood glucose and kidney function tests, or your doctor may need to adjust your metformin dose. It is especially important to mention the following:

• medicines that increase urine production (diuretics)
• medicines used to treat pain and inflammation (NSAIDs and COX-2 inhibitors, such as ibuprofen and celecoxib)
• certain medicines to treat high blood pressure (ACE inhibitors and angiotensin II receptor antagonists)
• beta-2 agonists, such as salbutamol or terbutaline (used to treat asthma)
• corticosteroids (used to treat various conditions, such as severe skin inflammation or asthma)
• medicines that may alter the amount of metformin in your blood, especially if you have reduced kidney function (such as verapamil, rifampicin, cimetidine, dolutegravir, ranolazine, trimethoprim, vandetanib, isavuconazole, crizotinib, olaparib)
• other medicines used to treat diabetes

Taking Metformin Stadafarma with alcohol

Avoid excessive alcohol consumption while taking metformin, as this can increase the risk of lactic acidosis (see section "Warnings and precautions").

Pregnancy and breastfeeding

If you are pregnant, think you may be pregnant, or are planning to have a baby, consult your doctor, as it may be necessary to change your treatment or monitor your blood sugar levels.

This medicine is not recommended if you are breastfeeding or planning to breastfeed your baby.

Driving and using machines

Metformin alone does not cause hypoglycemia (a blood sugar concentration that is too low). This means it will not affect your ability to drive or use machines.

However, be especially careful if you take metformin with other diabetes medicines that can cause hypoglycemia (such as sulfonylureas, insulin, meglitinides). The symptoms of hypoglycemia include weakness, dizziness, increased sweating, increased heart rate, vision disturbances, or difficulty concentrating. Do not drive or use machines if you start to feel these symptoms.

3. How to take Metformin Stadafarma

Follow the instructions for administration of this medicine exactly as told by your doctor. If you are unsure, consult your doctor or pharmacist.

Metformin cannot replace the benefits of a healthy lifestyle. Continue to follow any dietary advice your doctor has given you and exercise regularly.

Recommended dose

Children aged 10 years and older, and adolescents

Usually start with 500 mg or 850 mg of metformin once a day. The maximum daily dose is 2,000 mg divided into 2 or 3 doses. Treatment of children between 10 and 12 years is only recommended under specific advice from your doctor, as clinical experience in this patient group is limited.

Adults

Usually start with 500 mg or 850 mg of metformin, 2 or 3 times a day. The maximum daily dose is 3,000 mg divided into 3 doses. If you have reduced kidney function, your doctor may prescribe a lower dose.

If you are also given insulin, your doctor will tell you how to start taking metformin.

Metformin Stadafarma 1,000 mg film-coated tablets:

The tablets can be divided into equal doses.

Monitoring

• Your doctor will perform regular blood glucose tests and adjust your metformin dose according to your blood glucose levels. Make sure to talk to your doctor regularly. This is especially important for children, adolescents, or if you are an elderly person.
• Your doctor will also check how well your kidneys are working at least once a year. You may need more frequent checks if you are an elderly person or if your kidneys are not working normally.

How to take metformin

The tablets are for oral use.

Take metformin with meals or after meals. This will help prevent digestive side effects. Do not chew or crush the tablets. Swallow each tablet with a glass of water.

• If you take one dose a day, take it in the morning (at breakfast).
• If you take two doses a day, take them in the morning (at breakfast) and at night (at dinner).
• If you take three doses a day, take them in the morning (at breakfast), at lunchtime, and at night (at dinner).

If, after some time, you think the effect of metformin is too strong or too weak, consult your doctor or pharmacist.

If you take more Metformin Stadafarma than you should

If you have taken more metformin than you should, you may suffer from lactic acidosis. The symptoms of lactic acidosis are non-specific, such as vomiting, stomach pain (abdominal pain) with cramps, a general feeling of discomfort with intense fatigue, and difficulty breathing. Additional symptoms may include decreased body temperature and heart rate. If you experience any of these symptoms, you should seek medical attention immediatelyas lactic acidosis can lead to a coma. Stop taking metformin immediately and contact your doctor or the nearest hospital right away.

In case of overdose or accidental ingestion, consult your doctor or pharmacist immediately or call the Toxicology Information Service. Phone: 91 562 04 20, indicating the medicine and the amount ingested.

If you forget to take Metformin Stadafarma

Do not take a double dose to make up for forgotten doses. Take the next dose at the usual time.

If you have any further questions on the use of this medicine, ask your doctor or pharmacist.

4. Possible side effects

Like all medicines, this medicine can cause side effects, although not everybody gets them. The following side effects may occur:

Metformin can cause a very rare but very serious side effect called lactic acidosis (see section "Warnings and precautions"). If this happens to you, you should stop taking metformin and contact a doctor or the nearest hospital immediately, as lactic acidosis can lead to a coma.

The symptoms of lactic acidosis include:

• Vomiting
• Stomach pain (abdominal pain)
• Muscle cramps
• Feeling of discomfort with intense fatigue
• Difficulty breathing
• Reduced body temperature and heart rate

Other possible side effects are listed by frequency as follows:

Very common(may affect more than 1 in 10 people)

• digestive problems, such as nausea, vomiting, diarrhea, stomach pain (abdominal pain), and loss of appetite

These side effects occur more frequently at the start of treatment with metformin. Spreading the doses throughout the day and taking metformin during or immediately after a meal can help reduce these side effects. If the symptoms continue, stop taking metformin and consult your doctor.

Common(may affect up to 1 in 10 people)

• changes in taste
• low or reduced vitamin B12 levels in the blood (symptoms may include extreme fatigue, red and painful tongue, numbness or tingling). Your doctor may schedule some tests to find the reason for your symptoms because some of them may be caused by diabetes or other health problems not related to metformin

Very rare(may affect up to 1 in 10,000 people)

• lactic acidosis. It is a very rare but serious complication, especially if your kidneys do not work properly. The symptoms of lactic acidosis are non-specific (see section "Warnings and precautions")
• abnormalities in liver function tests or hepatitis (inflammation of the liver; this can cause fatigue, loss of appetite, weight loss, with or without a yellowish tint to the skin or the whites of the eyes). If this happens to you, stop taking metformin and talk to your doctor
• skin reactions such as redness of the skin (erythema), itching, or an itchy rash (urticaria)

Children and adolescents

Limited data in children and adolescents showed that the side effects were similar in nature and severity to those observed in adults.

Reporting of side effects

If you experience any side effects, talk to your doctor or pharmacist, even if it is possible that they are not listed in this leaflet. You can also report side effects directly through the Spanish Pharmacovigilance System for Human Use Medicines: www.notificaRAM.es. By reporting side effects, you can help provide more information on the safety of this medicine.

5. Storage of Metformina Stadafarma

Keep this medication out of sight and reach of children.

Do not use this medication after the expiration date shown on the packaging after "CAD". The expiration date is the last day of the month indicated.

HDPE bottles: After the first opening, the bottle can be used for up to 90 days.

This medication does not require special storage conditions.

Medicines should not be disposed of via wastewater or household waste. Deposit the packaging and any unused medications at the pharmacy's SIGRE Point. If in doubt, ask your pharmacist how to dispose of the packaging and unused medications. This will help protect the environment.

6. Package Contents and Additional Information

Composition of Metformina Stadafarma

Metformina Stadafarma 850 mg film-coated tablets EFG

The active ingredient is metformin hydrochloride. One film-coated tablet contains 850 mg of metformin hydrochloride, equivalent to 663 mg of metformin base. The other ingredients are magnesium stearate, povidone (E1201), hypromellose 2910 (E464), titanium dioxide (E171), and macrogol 3350.

Metformina Stadafarma 1,000 mg film-coated tablets EFG

The active ingredient is metformin hydrochloride. One film-coated tablet contains 1,000 mg of metformin hydrochloride, equivalent to 780 mg of metformin base. The other ingredients are magnesium stearate, povidone (E1201), hypromellose 2910 (E464), titanium dioxide (E171), and macrogol 3350.

Product Appearance and Package Contents

Description

Metformina Stadafarma 850 mg film-coated tablets EFG:

Film-coated tablets, round, white to off-white, engraved with "002" on one side and "850" on the other side. The approximate dimensions of the tablets are 13 mm in diameter and 7 mm in thickness.

Metformina Stadafarma 1,000 mg film-coated tablets EFG:

Film-coated tablets, white to off-white, oval, biconvex, engraved with "003" on one side and "1000" on the other side, and scored on both sides. The tablet can be divided into equal doses. The approximate dimensions of the tablets are 19 mm in length and 10 mm in width.

Package Contents

Metformina Stadafarma 850 mg film-coated tablets EFG:

PVC-aluminum blisters with 18, 30, 40, 50, 56, 60, 90, 100, 120, and 180 film-coated tablets.

HDPE bottles with child-resistant polypropylene closure, opaque white cap, translucent inner cap, and liner containing 100 film-coated tablets.

HDPE bottles with screw cap of polypropylene, opaque white cap, translucent inner cap, and liner containing 500 film-coated tablets.

Metformina Stadafarma 1,000 mg film-coated tablets EFG:

PVC-aluminum blisters with 18, 30, 50, 60, 90, 120, 180, and 1,500 film-coated tablets.

HDPE bottles with child-resistant polypropylene closure, opaque white cap, translucent inner cap, and liner containing 100 film-coated tablets.

HDPE bottles with screw cap of polypropylene, opaque white cap, translucent inner cap, and liner containing 500 film-coated tablets.

The package sizes of 500 tablets (in HDPE bottles) and 1,500 tablets (in blisters) are only for hospitals and personalized dosing systems.

Only some package sizes may be marketed.

Marketing Authorization Holder and Manufacturer

Marketing Authorization Holder

Laboratorio STADA, S.L.

Frederic Mompou, 5

08960 Sant Just Desvern (Barcelona)

Spain

[email protected]

Manufacturer

STADA Arzneimittel AG

Stadastrasse 2 – 18

61118 Bad Vilbel,

Germany

or

Centrafarm Services B.V.

Nieuwe Donk, 9

4879 AC Etten-Leur

Netherlands

or

Laboratori Fundació Dau

Calle Lletra C de la Zona Franca 12-14

Polígono Industrial de la Zona Franca de Barcelona

08040 Barcelona

Spain

Date of the Last Revision of this Leaflet:May 2025

Detailed information on this medication is available on the website of the Spanish Agency for Medicines and Health Products (AEMPS) http://www.aemps.gob.es/