Methotrexate
Metex contains methotrexate as the active substance.
Methotrexate is a substance with the following properties:
Indications for use of Metex
Rheumatoid arthritis(RA) is a chronic disease classified as collagenosis,
characterized by inflammation of the synovial membranes lining the joints. The synovial membranes produce fluid,
which acts as a lubricant for many joints. The inflammatory state causes thickening of the membranes and swelling of the joints.
Juvenile arthritisoccurs in children and adolescents under the age of 16. The polyarticular form is indicated by the involvement of 5 or more joints within the first 6 months
of the disease.
Psoriatic arthritisis a type of arthritis with psoriatic changes
on the skin and nails, which particularly affects the joints of the fingers and toes.
Psoriasis, a common chronic skin disease, is characterized by red patches covered with thick, dry, silvery, tightly adhering scales.
Metex modifies and slows down the progression of the disease.
Crohn's diseaseis a type of inflammatory bowel disease that can affect
any part of the gastrointestinal tract, causing symptoms such as abdominal pain, diarrhea, vomiting, or weight loss.
Before starting treatment with Metex, the patient should discuss with their doctor or pharmacist:
Special precautions for use of Metex
Methotrexate temporarily disrupts the production of sperm and egg cells; in most cases, this effect disappears. Methotrexate may cause miscarriage and severe birth defects. Women should avoid becoming pregnant while taking methotrexate and for at least 6 months after stopping treatment. Men should avoid fertilizing their partner while taking methotrexate and for at least 3 months after stopping treatment. See also "Pregnancy, breastfeeding, and fertility".
Recommended tests and precautions
Severe side effects may occur even after administration of low doses of methotrexate. To detect them in time, the doctor must perform regular check-ups and laboratory tests.
Before starting treatment
Before starting treatment, a blood test will be performed to check if the patient has a sufficient number of blood cells. Blood tests will also be performed to assess liver function and check for hepatitis. Additionally, the level of albumin (a blood protein) in the serum and kidney function will be checked, and an assessment for hepatitis (liver infection) will be performed. The doctor may also decide to perform other liver tests, which may include liver imaging or taking a small tissue sample from the liver for a more detailed assessment. Furthermore, the doctor may check if the patient has tuberculosis and may perform a chest X-ray or lung function test.
During treatment
The doctor may perform the following tests:
It is very important for the patient to attend these scheduled tests.
If the results of any of these tests show abnormalities, the doctor will adjust the treatment accordingly.
Elderly patients
Elderly patients treated with methotrexate should be closely monitored by their doctor to quickly detect any possible side effects.
Age-related disorders of liver and kidney function and low folate reserves in the body of older individuals require the use of relatively low doses of methotrexate.
Other precautions
During treatment with methotrexate, cases of acute pulmonary bleeding have been reported in patients with underlying rheumatologic disease. If the patient experiences hemoptysis, they should immediately consult their doctor.
Methotrexate may affect the immune system, vaccination results, and immunological test results. There may be reactivation of latent chronic diseases (e.g., shingles, tuberculosis, hepatitis B or C). During treatment with Metex, live vaccines should not be used.
Methotrexate may increase the sensitivity of the skin to sunlight. The patient should avoid intense sun exposure and not use a sunbed or sunlamp without consulting their doctor. To protect the skin from intense sunlight, the patient should wear appropriate clothing or use a sunscreen with a high protection factor.
During treatment with methotrexate, radiation-induced skin inflammation and sunburn (recall reaction) may occur. Exposure to UV radiation during methotrexate treatment may exacerbate psoriatic lesions.
Lymph node enlargement (lymphoma) may occur. In such cases, treatment should be discontinued.
Diarrhea may be a sign of toxic effects of Metex and requires discontinuation of treatment. If the patient experiences diarrhea, they should tell their doctor.
In patients with cancer receiving methotrexate treatment, certain brain function disorders (encephalopathy/leukoencephalopathy) have been reported. It cannot be excluded that such side effects may occur in the treatment of other diseases. The symptoms of these brain function disorders include altered mental state, movement disorders (ataxia), vision disorders, and memory disorders[unknown frequency].
The patient should tell their doctor or pharmacist about all medicines they are currently taking or have recently taken, as well as any medicines they plan to take. This includes medicines that will be taken in the future.
Concomitant administration of certain medicines may affect the action of Metex:
Vitamin products containing folinic acidshould only be used if prescribed by a doctor, as they may reduce the effect of methotrexate.
While taking Metex, the patient should avoid drinking alcohol and large amounts of coffee, caffeinated beverages, and black tea.
Pregnancy
Metex should not be used if the patient is pregnant or trying to become pregnant. Methotrexate may cause birth defects, harm the unborn child, or cause miscarriage.
This is related to developmental abnormalities of the skull, face, heart, and blood vessels, brain, and limbs. Therefore, it is very important that female patients who are pregnant or planning to become pregnant do not take methotrexate. If the patient is of childbearing age, it must be definitively confirmed that she is not pregnant before starting treatment, by taking appropriate measures, e.g., performing a pregnancy test.
The patient should avoid becoming pregnant while taking methotrexate and for at least 6 months after stopping treatment, using reliable contraceptive methods throughout this time (see also "Warnings and precautions").
If the patient becomes pregnant while taking methotrexate or suspects that she may be pregnant, she should consult her doctor as soon as possible. The patient should receive advice on the possible harmful effects of treatment on the child.
If the patient plans to become pregnant, she should consult her doctor, who may refer her to a specialist for advice before starting treatment.
Breastfeeding
Breastfeeding should be discontinued before starting and during treatment with Metex.
Male fertility
Available evidence does not indicate an increased risk of birth defects or miscarriages after the father has taken methotrexate at a dose below 30 mg/week. However, the risk cannot be entirely excluded. Methotrexate may be genotoxic, meaning it may cause genetic mutations. Methotrexate may affect sperm and cause birth defects. Therefore, the patient should avoid fertilizing their partner and should not donate sperm while taking methotrexate and for at least 3 months after stopping treatment.
While taking Metex, the patient may experience side effects from the central nervous system, such as fatigue and dizziness. Therefore, the ability to drive vehicles or operate machines may be impaired in some cases.
In case of drowsiness or fatigue, the patient should not drive vehicles or operate machines.
The medicine contains less than 1 mmol (23 mg) of sodium per dose, which means it is considered "sodium-free".
In the treatment of rheumatoid arthritis, juvenile idiopathic arthritis, psoriasis, psoriatic arthritis, and Crohn's disease, Metex should be used only once a week. Using more Metex (methotrexate) than prescribed may be fatal. The patient should read section 3 of this leaflet carefully. If they have any questions, they should consult their doctor or pharmacist before using the medicine.
This medicine should be used as directed by the doctor. If the patient has any doubts, they should consult their doctor or pharmacist.
The doctor will decide on the dosage, which will be tailored to the individual patient.
The effects of treatment are usually visible only after 4-8 weeks.
Metex should be administered by a doctor or medical staff or under their supervision by subcutaneous injection only once a week. The day of injection should be determined by the patient in consultation with their doctor.
The doctor will decide on the appropriate dose for children and adolescents with polyarticular juvenile idiopathic arthritis.
Metex is not recommended for use in children under 3 years of age due to insufficient experience in this age group.
Metex is injected subcutaneously once a week!
The duration of treatment is determined by the doctor. Treatment of rheumatoid arthritis, juvenile idiopathic arthritis, psoriasis, psoriatic arthritis, and Crohn's disease with Metex is long-term.
Initially, Metex may be administered by medical staff. However, the doctor may decide that the patient is able to self-administer Metex subcutaneously. The patient will be properly trained in this regard.
The patient should never attempt to self-administer the medicine without prior training.
The patient should read the instructions at the end of the leaflet.
The technique for administration and disposal must be the same as for other cytostatic medicines and in accordance with local regulations. Pregnant women should not handle or administer Metex.
Avoid contact between methotrexate and skin or mucous membranes. In case of contamination, the affected area should be rinsed immediately with plenty of water.
If the patient has used a higher dose of Metex than recommended, they should immediately consult their doctor.
The patient should not take a double dose to make up for a missed dose.
If the patient stops taking Metex, they should immediately inform their doctor.
If the patient feels that the effect of Metex is too strong or too weak, they should consult their doctor or pharmacist.
Like all medicines, Metex can cause side effects, although not everybody gets them.
The frequency and severity of side effects depend on the dose and frequency of administration of the medicine. Since severe side effects may occur even after administration of low doses of methotrexate, regular medical check-ups are necessary. The treating doctor should order tests to rule out abnormalities in blood parameters (e.g., low white blood cell count, platelet count, and lymphoma) and changes in the liver and kidneys.
The patient should immediately tell their doctorif they experience any of the following symptoms, as they may indicate severe, potentially life-threatening side effects that require urgent treatment:
Other side effects that may occur:
Very common:may occur in more than 1 in 10 people
Common:may occur in up to 1 in 10 people
Uncommon:may occur in up to 1 in 100 people
Rare:may occur in up to 1 in 1,000 people
Very rare:may occur in up to 1 in 10,000 people
Frequency not known:frequency cannot be estimated from the available data
Subcutaneously administered doses of methotrexate are generally well tolerated locally. Only mild, local skin reactions have been observed, which decrease during treatment.
If the patient experiences any side effects, including any side effects not listed in this leaflet, they should tell their doctor or pharmacist. Side effects can be reported directly to the Department of Adverse Reaction Monitoring of the Office for Registration of Medicinal Products, Medical Devices, and Biocidal Products:
Jerozolimskie Avenue 181C, 02-222 Warsaw, phone: +48 22 49-21-301, fax: +48 22 49-21-309,
website: //smz.ezdrowie.gov.pl
Side effects can also be reported to the marketing authorization holder.
Reporting side effects helps to gather more information on the safety of the medicine.
Keep the medicine out of the sight and reach of children.
Do not store above 25°C.
Pre-filled syringes should be stored in the outer carton to protect from light.
Do not use this medicine after the expiry date stated on the carton. The expiry date refers to the last day of the month.
Medicines should not be disposed of via wastewater or household waste. The patient should ask their pharmacist how to dispose of medicines that are no longer needed. This will help protect the environment.
Metex pre-filled syringes contain a clear, yellow-brown solution.
The following pack sizes are available:
Pre-filled syringes with fixed needles for subcutaneous injection and graduation mark, packaged in blisters containing 0.15 ml, 0.20 ml, 0.25 ml, 0.30 ml, 0.35 ml, 0.40 ml, 0.45 ml, 0.50 ml, 0.55 ml, or 0.60 ml of the solution for injection in packs of 1, 4, 5, 6, 10, 11, 12, and 24 pre-filled syringes with a safety device.
Pre-filled syringes with fixed needles for subcutaneous injection and graduation mark, packaged in blisters containing 0.15 ml, 0.20 ml, 0.25 ml, 0.30 ml, 0.35 ml, 0.40 ml, 0.45 ml, 0.50 ml, 0.55 ml, or 0.60 ml of the solution for injection in calendar packs of 6 or 12 pre-filled syringes with a safety device.
Not all pack sizes may be marketed.
medac Gesellschaft für klinische Spezialpräparate mbH
Theaterstr. 6
22880 Wedel
Germany
Phone:
+49 4103 8006-0
Fax:
+49 4103 8006-100
Austria, Belgium, Czech Republic, Finland, Greece, Spain, Netherlands, Iceland, Slovakia, Slovenia, Sweden, Hungary: Metoject
Denmark, Estonia, Lithuania, Latvia, Norway, Poland, and Portugal: Metex
Germany: metex
Italy: Reumaflex
Date of last revision of the leaflet:2024-08-28
Metex should be administered by subcutaneous injection only once a week. Before starting the injection, the patient should read the instructions below carefully and always follow the injection technique recommended by their doctor, pharmacist, or nurse.
In case of any doubts or questions, the patient should consult their doctor, pharmacist, or nurse.
Choose a well-lit, clean, and flat work surface.
Wash hands thoroughly.
Remove the Metex pre-filled syringe from the packaging and read the leaflet carefully. The pre-filled syringe should be removed from the packaging at room temperature.
Before use, inspect the Metex syringe for visible defects (or cracks).
A small air bubble may be visible in the solution, which will not affect the dose or be harmful.
The best injection sites are:
This approach helps to minimize the risk of irritation at the injection site.
Hold a fold of skin between two fingers and quickly insert the needle into the skin at a 90-degree angle.
Insert the needle fully into the skin fold. Slowly press the plunger and inject the solution under the skin. Hold the skin fold until the injection is complete.
Carefully pull the needle out of the skin with a straight motion.
Methotrexate should not come into contact with skin or mucous membranes. In case of contact, the affected area should be rinsed immediately with plenty of water.
In case of needlestick injury to the patient or another person, they should immediately consult their doctor and not use the pre-filled syringe.
The method of preparing the medicine for use and disposing of the medicine and pre-filled syringe must be in accordance with local regulations. Pregnant healthcare workers should not prepare or administer Metex.
Metex should be administered by subcutaneous injection only once a week. Before starting the injection, the patient should read the instructions below carefully and always follow the injection technique recommended by their doctor, pharmacist, or nurse.
In case of any doubts or questions, the patient should consult their doctor, pharmacist, or nurse.
Choose a well-lit, clean, and flat work surface.
Wash hands thoroughly.
Remove the Metex pre-filled syringe with a safety device from the packaging and read the leaflet carefully. The pre-filled syringe should be removed from the packaging at room temperature.
Before use, inspect the Metex syringe for visible defects (or cracks).
A small air bubble may be visible in the solution, which will not affect the dose or be harmful.
The best injection sites are:
This approach helps to minimize the risk of irritation at the injection site.
Hold a fold of skin between two fingers and quickly insert the needle into the skin at a 90-degree angle.
Insert the needle fully into the skin fold. Slowly press the plunger and inject the solution under the skin.
Hold the skin fold until the injection is complete.
Carefully pull the needle out of the skin with a straight motion.
The protective cap automatically covers the needle.
Note: The safety mechanism will only work if the syringe is fully emptied by pressing the plunger down to the stop.
Methotrexate should not come into contact with skin or mucous membranes. In case of contact, the affected area should be rinsed immediately with plenty of water.
In case of needlestick injury to the patient or another person, they should immediately consult their doctor and not use the pre-filled syringe.
The method of preparing the medicine for use and disposing of the medicine and pre-filled syringe must be in accordance with local regulations. Pregnant healthcare workers should not prepare or administer Metex.
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