Pregnancy
Do not use Imeth during pregnancy or if you are planning to become pregnant. Methotrexate can cause birth defects, harm the fetus, or cause miscarriages. It is associated with skull, facial, heart, and blood vessel malformations, brain, and limb defects. Therefore, it is very important that methotrexate not be administered to pregnant patients or those planning to become pregnant. In fertile women, any possibility of pregnancy should be excluded with appropriate measures, such as a pregnancy test before starting treatment. You should avoid becoming pregnant while taking methotrexate and for at least 6 months after stopping treatment, using reliable contraceptive methods during this entire time (see also section "Warnings and precautions").
If you become pregnant during treatment or suspect you may be pregnant, consult your doctor as soon as possible. You will be offered information about the risk of adverse effects on the child during treatment.
If you want to become pregnant, consult your doctor, who may refer you to a specialist to inform you before the planned start of treatment.
Lactation
You should not breastfeed during treatment, as methotrexate passes into breast milk. If your doctor considers that methotrexate treatment is absolutely necessary during lactation, you should interrupt breastfeeding.
Male fertility
Available data do not indicate a higher risk of malformations or miscarriages if the father takes a methotrexate dose of less than 30 mg/week. However, this risk cannot be completely ruled out. Methotrexate may be genotoxic, meaning it can cause genetic mutations. Methotrexate may affect sperm production and cause birth defects. Therefore, you should avoid fathering a child or donating semen while taking methotrexate and for at least 3 months after stopping treatment.
Driving and operating machines
During Imeth treatment, adverse effects affecting the central nervous system, such as fatigue and dizziness, may occur. Therefore, in some cases, your ability to drive vehicles and/or operate machines may be affected. If you feel tired or dizzy, you should not drive or operate machines.
IMETH contains sodium
This medication contains less than 1mmol of sodium (23mg) per dose, i.e., it is essentially sodium-free.
Important Warning about Imeth (methotrexate) Dosage:
Use Imethonly once a weekfor the treatment ofrheumatoid arthritis, active juvenile idiopathic arthritis, psoriasis, psoriatic arthritis, and Crohn's disease. Excessive use of Imeth (methotrexate) can be fatal. Read section 3 of this prospectus carefully. If you have any doubts, consult your doctor or pharmacist before taking this medication.
Follow exactly the administration instructions of this medication indicated by your doctor. In case of doubt, consult your doctor or pharmacist again.
Imethis administeredonly once a week. You may decide, along with your doctor, a suitable day of the week for each week you receive your injection.
Incorrect administration of Imethmay cause severe adverse effects, including potentially fatal adverse effects.
The normal dose is:
Posology in patients with rheumatoid arthritis
The recommended initial dose is 7.5mg of methotrexateonce a week. Imethis administered in a single application in the form of an injection under the skin (see section "Method and duration of administration").
If this is inadequate and well tolerated, Imethdoses may be increased. The average weekly dose is 15-20mg. Generally, aweekly doseof 25mg of Imeth should not be exceeded. Once the desired therapeutic results are achieved, the dose should be reduced, if possible, gradually to the lowest possible maintenance dose.
Posology in children and adolescents under 16 years with polyarticular forms of juvenile idiopathic arthritis
The recommended dose is 10-15mg/m2of body surfaceper week. In cases of inadequate response, the weekly dose may be increased to 20mg/m2of body surface/week. However, more frequent medical checks should be performed. It should be administered via subcutaneous injection (under the skin).
It is not recommended for use in children under 3 years due to insufficient experience in this age group.
Adults with severe forms of psoriasis vulgar or psoriatic arthritis
It is recommended to administer a single test dose of 5-10mg to evaluate potential harmful effects. This dose can be administered subcutaneously (under the skin).
If no changes in blood counts are observed one week later, treatment should continue with a dose of approximately 7.5mg. The dose can be increased gradually (in amounts of 5-7.5mg per week and controlling blood counts) until the desired therapeutic results are achieved. Generally, aweekly doseof 20mg can be associated with a significant increase in toxicity. A weekly dose of 30mg should not be exceeded. Once the desired therapeutic results are achieved, the dose should be reduced weekly to the lowest possible maintenance dose for the patient.
Posology in adult patients with Crohn's disease
The duration of treatment will be determined by the doctor. Crohn's disease treatment with Imeth is a long-term treatment.
• Induction treatment:
25 mg/week administered subcutaneously.
Response to treatment can be expected approximately 8 to 12 weeks after treatment.
• Maintenance treatment:
15 mg/week administered subcutaneously.
This medication is not indicated for pediatric patients with Crohn's disease.
Patients with renal impairment
Patients with renal impairment may require a reduced dose.
Method and duration of administration
The doctor will determine the duration of treatment. Imethis injectedonce a week. It is recommended to specify a particular day of the week as the injection day. Imethis administered in the form of an injection under the skin. Treatment of rheumatoid arthritis, juvenile idiopathic arthritis, psoriasis vulgar, and psoriatic arthritis with Imethis a long-term treatment.
Rheumatoid arthritis
Generally, an improvement in symptoms can be expected within 4-8 weeks of treatment. Symptoms may recur after discontinuation of Imethtreatment.
Severe forms of psoriasis vulgar and psoriatic arthritis (psoriatic arthritis)
Response to treatment can be expected generally within 2-6 weeks. Depending on the clinical picture and changes in laboratory parameters, treatment will be continued or discontinued.
At the beginning of treatment, Imeth may be administered by medical personnel. However, your doctor may decide that you can learn to administer Imeth yourself. You will receive the necessary training for this. Under no circumstances should you attempt to administer Imeth yourself unless you have been taught how to do so.
How to administer an IMETH injection
If you do not know how to handle the syringe, ask your doctor or pharmacist. Do not attempt to administer the injection yourself if you have not received training. If you are unsure of what to do, speak immediately with your doctor or nurse.
Before injecting IMETH
Instructions on how to inject IMETH
1) Wash your hands thoroughly with soap and water.
2) Sit or lie down in a comfortable and relaxed position. Make sure you can see the area of skin where you will administer the injection.
3) The syringe is preloaded and ready to use. Open the blister pack, exposing the top layer of the blister completely as shown.
4) Caution: DO NOT hold the product by the plunger or the cap of the needle. Remove the syringe from the box by holding it by the body as shown in the image below.
5) Visually inspect the syringe. You should be able to see a yellow liquid through the viewing window. You may see a small air bubble; this will not affect the injection and will not cause any harm.
6) Choose an injection site and disinfect it with the alcohol-soaked swab provided. This takes between 30 and 60 seconds to take effect. Suitable areas for injection are the skin of the front of the abdominal wall and the skin of the front of the thigh.
7) While holding the body of the syringe, remove the cap.
Do notpress the plunger before self-injecting to remove air bubbles. If you do, you may lose medication. After removing the cap, hold the syringe in your hand. Avoid letting the syringe come into contact with any other object. This ensures that the needle remains clean.
8) Hold the syringe with the hand you write with (as if it were a pencil) and, with the other hand, form a fold in the skin by gently pinching the skin at the injection site with your index and middle fingers.Make sure to hold the skin fold throughout the injection.
9) Move the syringe towards the skin fold (injection site) with the needle guard pointing directly at the injection site. Insert the needle until it reaches the bottom of the skin fold.
10) Press the plunger down with your finger until the syringe is empty. This will inject the medication under the skin.
11) Remove the needle; to do this, pull it straight out. The safety guard of the syringe will automatically cover the needle to prevent needlestick injuries. You can now release the skin fold.
Nota: The safety system that releases the safety guard can only be activated when the syringe is empty by pressing the plunger to the end.To avoid hematomas, do not rub the injection site after injecting.
12) Dispose of the syringe in the puncture container provided. Close the container lid tightly and place it out of reach of children. In case of accidental contact of methotrexate with the skin or soft tissues, rinse the area with plenty of water.When the container is full, hand it over to your doctor or nurse to dispose of it. Do not throw it away.
If you use moreIMETHthan you should
Follow the administration instructions of your doctor. Do not change the dose on your own.
If you suspect that you (or someone else) has administered too much Imeth, contact your doctor or go to the nearest hospital immediately. They will decide what therapeutic measures are necessary based on the severity of the overdose.
A methotrexate overdose can cause severe toxic reactions. Symptoms of overdose may include unusual bruising or bleeding, weakness, mouth sores, nausea, vomiting, black or bloody stools, coughing up blood or coffee ground-like vomit, and decreased urine production. See section 4.
Take the medication packaging with you if you go to the doctor or hospital.
The antidote for overdose is folic acid.
If you forget to useIMETH
Do not take a double dose to make up for the missed dose, but continue taking the prescribed dose. Ask your doctor for advice.
If you interrupt treatment withIMETH
Do not interrupt or discontinue treatment with Imeth unless you have agreed to do so with your doctor. If you suspect severe adverse effects, speak with your doctor immediately.
If you have any other questions about the use of this medication, ask your doctor or pharmacist.
Like all medicines, this medicine can cause side effects, although not everyone will experience them.
Inform your doctor immediately if you experience sudden weakness; difficulty breathing; swelling of the eyelids, face, or lips; skin rash or itching (especially if it affects the entire body).
Severe side effects
If you develop any of the following severe side effects, contact your doctor immediately:
The following side effects have also been reported:
Very common: | Affect more than 1 in 10 people. |
Common: | Affect 1 in 10 to 1 in 100 people. |
Uncommon: | Affect 1 in 1,000 to 1 in 10,000 people. |
Rare: | Affect 1 in 10,000 to 1 in 100,000 people. |
Very rare: | Affect fewer than 1 in 10,000 people. |
Unknown frequency: | Cannot be estimated from available data. |
Very common:
Loss of appetite, nausea (dizziness), vomiting, abdominal pain, inflammation and ulcers in the mouth and throat, and increased liver enzymes.
Common:
Reduced formation of blood cells with a decrease in white blood cells, red blood cells, and/or platelets (leukopenia, anemia, thrombocytopenia), headache, fatigue, drowsiness, lung inflammation (pneumonia) with dry, non-productive cough, difficulty breathing, and fever, diarrhea, skin rash, redness, and itching.
Uncommon:
Decreased number of blood cells and platelets, dizziness, confusion, depression, seizures, inflammation of blood vessels, lung damage, ulcers, and bleeding in the digestive tract, liver disorders, diabetes, decreased proteins in the blood, urticaria (hives), sunburn-like reactions due to increased skin sensitivity to sunlight, brown discoloration of the skin, hair loss, increased rheumatoid nodules, herpes, painful psoriasis, joint or muscle pain, osteoporosis (bone mass reduction), inflammation and ulcers in the bladder (possibly with blood in the urine), painful urination, severe allergic reactions, inflammation and ulcers in the vagina, and slow wound healing.
Rare:
Lung inflammation around the heart, fluid in the sac around the heart, severe vision impairment, mood swings, low blood pressure, blood clots, sore throat, interrupted breathing, asthma, digestive tract inflammation, bloody stools, gum inflammation, abnormal digestion, acute hepatitis (liver inflammation), nail color changes, acne, red or purple spots due to bleeding from blood vessels, bone fractures, kidney insufficiency, decreased or absent urine, electrolyte imbalances, defective sperm formation, and menstrual irregularities.
Very rare:
Infections, severe bone marrow insufficiency, liver insufficiency, swollen glands, insomnia, pain, muscle weakness, numbness or tingling/sensitivity to minor stimuli, altered taste (metallic taste), inflammation of the brain's lining causing paralysis or vomiting, red eyes, eye damage, fluid in the lungs, vomiting blood, fever, protein in the urine, loss of libido, erectile dysfunction, nail infections, severe digestive tract complications, boils, small blood vessels in the skin, fungal infections, skin blood vessel damage, vaginal discharge, infertility, and gynecomastia (breast enlargement in men) in men, and excessive proliferation of lymphocytes (excessive increase of white blood cells).
Unknown frequency:
Some brain infections (leucoencephalopathy), pulmonary hemorrhage, jawbone damage (secondary to excessive white blood cell increase), tissue destruction at the injection site, skin redness, and peeling.
When administered intramuscularly, methotrexate may cause local side effects (burning sensation) or damage (abscess formation, fat tissue destruction) at the injection site. Subcutaneous administration of methotrexate is well tolerated locally. Only mild local skin reactions were observed, which decreased during treatment.
Methotrexate may cause a decrease in white blood cells and reduce your resistance to infection. If you experience an infection with symptoms such as fever and severe deterioration of your overall health, or fever with local infection symptoms such as sore throat, pharyngitis, mouth pain, or urinary problems, seek immediate medical attention. A blood test will be performed to check for possible white blood cell reduction (agranulocytosis). Inform your doctor about your medication.
Methotrexate can cause severe side effects (sometimes life-threatening). Your doctor will perform tests to check for any abnormalities in the blood (e.g., low white blood cells, low platelets, lymphoma) and changes in the kidneys and liver.
Reporting side effects
Ifyou experience any type of side effect, consult your doctor or pharmacist, even if it is not listed in this prospectus. You can also report them directly through the national notification system included in the Spanish System for Pharmacovigilance of Medicines for Human Use:www.notificaram.es. By reporting side effects, you can contribute to providing more information on the safety of this medicine.
Keep this medication out of the sight and reach of children.
Store at a temperature below 25°C.
Store the syringe in the outer box to protect it from light.
Do not freeze.
Do not use this medication after the expiration date that appears on the preloaded syringe label and the box after CAD. The expiration date is the last day of the month indicated.
The product must be used immediately after opening.
Do not use Imeth if the solution is not transparent and contains particles.
For single use. Dispose of any unused solution remainder. Medications should not be thrown into the drains or trash. Deposit containers and medications you no longer need at the SIGRE collection point at the pharmacy. If in doubt, ask your pharmacist how to dispose of containers and medications you no longer need. This will help protect the environment.
Composition of IMETH
Appearance of IMETH and packaging contents
Pre-filled syringes of Imeth contain a transparent and yellowish solution. Pre-filled syringes come equipped with an injection needle and a safety device to prevent needlestick injuries and reuse.
The following packaging sizes are available:
Pre-filled syringes of 0.3ml containing 7.5mg of methotrexate.
Pre-filled syringes of 0.4ml containing 10mg of methotrexate.
Pre-filled syringes of 0.5 ml containing 12.5 mg of methotrexate.
Pre-filled syringes of 0.6 ml containing 15 mg of methotrexate.
Pre-filled syringes of 0.7 ml containing 17.5 mg of methotrexate.
Pre-filled syringes of 0.8 ml containing 20 mg of methotrexate.
Pre-filled syringes of 0.9 ml containing 22.5 mg of methotrexate.
Pre-filled syringes of 1.0 ml containing 25 mg of methotrexate.
Injectable solution in packaging of 1, 4, 6, and 24 pre-filled syringes.
Each packaging of 1, 4, 6, and 24 pre-filled syringes contains 2, 8, 12, and 48 alcohol swabs, respectively.
Only some packaging sizes may be commercially available.
Marketing authorization holder and responsible manufacturer
Marketing authorization holder
Nordic Group B.V.
Siriusdreef 41
2132 WT Hoofddorp
Netherlands
For more information about this medication, please contact the local representative of the marketing authorization holder:
Nordic Pharma SAU
Adolfo Pérez Esquivel 3, 2nd floor 17.
28232 Las Rozas (Madrid)
Spain
Responsible manufacturer
Cenexi - Laboratoires Thissen SA
Rue de la Papyree 2-6, Braine-L'’Alleud, Brabant Wallon
B-1420
Belgium
This medication is authorized in the European Economic Area member states with the following names:
France:
iMETH 7.5 mg/0.3 ml, solution injectable en seringue préremplie
Netherlands
Methotrexaat Nordic 7.5 mg Oplossing voor injectie in een voorgevulde spuit
United Kingdom
Zlatal 7.5 mg, solution for injection in pre-filled syringe
Last review date of this leaflet: August 2024
The detailed and updated information about this medication is available on the website of the Spanish Agency for Medicines and Medical Devices (AEMPS) http://www.aemps.gob.es.
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