


Ask a doctor about a prescription for FENTANIL MATRIX VIATRIS 25 mcg/H TRANSDERMAL PATCHES
Package Leaflet: Information for the Patient
Fentanilo Matrix Viatris 25 micrograms/hour transdermal patches EFG
Read all of this leaflet carefully before you start using this medicine because it contains important information for you.
Contents of the pack
The name of your medicine is Fentanilo Matrix Viatris.
The patches help to relieve very strong and long-lasting pain.
Fentanilo Matrix Viatris contains a medicine called fentanyl. It belongs to a group of strong painkillers called opioids.
Do not use Fentanilo Matrix Viatris if:
Do not use this medicine if you or your child have any of the above conditions. If in doubt, consult your doctor or pharmacist before using Fentanilo Matrix Viatris.
Warnings and precautions
Applying the patch to another person
The patch should only be used on the skin of the person it has been prescribed for. There have been reports of patches accidentally sticking to a family member if there is physical contact or if the same bed is shared with the person wearing the patch. A patch that accidentally sticks to another person (especially a child) can cause the medicine to pass through the skin of the other person and cause serious side effects, such as breathing difficulties, with slow or shallow breathing, which can be life-threatening. If the patch sticks to another person's skin, remove it immediately and seek medical attention.
Be careful with Fentanilo Matrix Viatris
Consult your doctor or pharmacist before using this medicine if any of the following apply to you; your doctor may need to monitor you more closely if:
If any of the above apply to you (or if you are not sure), consult your doctor or pharmacist before using fentanyl.
While using the patch, tell your doctor if you have breathing problems while sleeping.Opioids like fentanyl can cause sleep-related breathing disorders such as sleep apnea (breathing pauses while sleeping) and sleep-related hypoxemia (low oxygen level in the blood). Talk to your doctor if you, your partner or caregiver notice any of the following symptoms:
Your doctor may decide to change the dose.
While using the patch, tell your doctor if you notice a change in the pain you feel.If you:
Do not change the dose on your own. Your doctor may decide to change the dose or change the treatment.
Side effects and Fentanilo Matrix Viatris
See section 4 for a complete list of possible side effects.
Long-term use and tolerance
This medicine contains fentanyl, an opioid. Repeated use of opioid painkillers can make the medicine less effective (the body gets used to it, which is known as pharmacological tolerance). You may also become more sensitive to pain when using fentanyl. This is known as hyperalgesia. Increasing the dose of the patches may continue to reduce the pain for a while, but it can also be harmful. If you notice that the medicine is becoming less effective, consult your doctor. Your doctor will decide whether it is better to increase the dose or gradually reduce the use of fentanyl.
Dependence and addiction
This medicine contains fentanyl, which is an opioid. It can cause dependence and/or addiction. |
Repeated use of fentanyl can also lead to dependence, abuse and addiction, which can result in a potentially life-threatening overdose. The risk of these side effects may be greater with a higher dose and longer use. Dependence or addiction can cause a feeling of lack of control over the amount of medicine you need to use or how often you need to use it. You may feel the need to continue using the medicine even if it no longer relieves the pain.
The risk of dependence or addiction varies from person to person. The risk of becoming dependent on or addicted to fentanyl may be greater if:
If you notice any of the following symptoms while using fentanyl, it could be a sign of dependence or addiction.
If you notice any of these signs, consult your doctor to determine the best treatment for you, when it is appropriate to stop the medicine and how to do it safely.
If you are using the patch, do not expose it to direct heat sources, such as electric blankets, hot water bottles, water beds, heat lamps or tanning lamps. Do not sunbathe or take long hot baths. Do not go to saunas or steam rooms or spas. If you do, you may increase the amount of medicine you receive from the patch.
Other medicines and Fentanilo Matrix Viatris
Tell your doctor or pharmacist if you are using, have recently used or might use any other medicines. This includes medicines that you buy without a prescription or herbal medicines. If you buy medicines from a pharmacy, you must also tell the pharmacist that you are using fentanyl.
Your doctor will know which medicines you can safely take with fentanyl. You may need to be monitored closely if you are taking or stop taking some of the types of medicines listed below, as this may affect the strength of fentanyl you need.
In particular, tell your doctor or pharmacist if you are taking:
Fentanilo Matrix Viatris with antidepressants
The risk of side effects increases if you are taking medicines such as certain antidepressants. Fentanyl can interact with these medicines and you may experience changes in your mental state, such as excitement, seeing, feeling, hearing or smelling things that are not there (hallucinations) and other effects such as changes in blood pressure, rapid heartbeat, high body temperature, overactive reflexes, lack of coordination, muscle stiffness, nausea, vomiting and diarrhea.
Use with central nervous system depressants, including alcohol and certain narcotics
Tell your doctor if you are taking any other medicine that slows down your central nervous system (CNS depressant). For example, CNS depressants are medicines that make you drowsy, reduce anxiety or reduce consciousness (see also "Other medicines and Fentanilo Matrix Viatris"); alcohol and certain narcotics are also CNS depressants. Taking these types of medicines with Fentanilo Matrix Viatris can cause severe drowsiness, reduced consciousness, breathing difficulties with slow or shallow breathing, coma or death.
Do not drink alcohol while using Fentanilo Matrix Viatris, unless you have talked to your doctor first.
Operations
If you think you are going to receive anesthesia, tell your doctor or dentist that you are using fentanyl.
Pregnancy and breastfeeding
If you are pregnant or breastfeeding, think you may be pregnant or are planning to have a baby, ask your doctor or pharmacist for advice before using this medicine.
Fentanyl should not be used during pregnancy, unless you have talked to your doctor.
Fentanyl should not be used during childbirth, as the medicine can affect the breathing of the newborn baby.
Do not use fentanyl if you are breastfeeding. You should not breastfeed for 3 days after removing the fentanyl patch. This is because the medicine can pass into breast milk.
Driving and using machines
Fentanyl can affect your ability to drive and use tools or machines, as it can cause drowsiness or dizziness. If this happens, do not drive or use tools or machines. Do not drive while using this medicine until you know how it affects you.
Talk to your doctor or pharmacist if you are not sure if it is safe to drive while taking this medicine.
Follow the administration instructions for this medication exactly as indicated by your doctor. In case of doubt, consult your doctor or pharmacist again.
The doctor will decide which dose of Fentanilo Matrix Viatris is most suitable, taking into account the severity of the pain, your general condition, and the type of pain treatment you have received so far.
Before starting treatment and regularly during treatment, your doctor will also explain what you can expect from the use of fentanyl, when and for how long you should use it, when you should contact your doctor, and when you should stop using it (see also section 2, "Withdrawal syndrome when stopping fentanyl treatment").
Using and changing patches
Apply the patch on | Change the patch on | |
Monday | Thursday | |
Tuesday | Friday | |
Wednesday | Saturday | |
Thursday | Sunday | |
Friday | Monday | |
Saturday | Tuesday | |
Sunday | Wednesday |
Where to apply the patch
Adults
Use in children
Adultsand children:
Do not apply the patch to
Applying a patch
Step 1: Skin preparation
Step 2: Open the pouch
Figure 1:

Figure 2:

Figure 3:

Figure 4:

Step 3: Peel and press
Figure 5:

Figure 6:

Figure 7:
Figure 8:

Step 4: How to dispose of the patch
Step 5: Washing
More information about using Fentanilo Matrix Viatris
Daily activities while using the patches
When will the patches start working?
How long will you use the patches?
If the pain worsens
If you use too many patches or if you wear a patch with the wrong dose
If you have applied too many patches or the patch has an incorrect dose, remove them and contact your doctor or pharmacist immediately, call the Toxicology Information Service, phone 91 562 04 20 (indicating the medication and the amount applied), or go to the nearest hospital. Bring the packaging and remaining patches with you.
The signs of overdose include difficulty breathing or weak breathing, tiredness, extreme drowsiness, inability to think clearly, walk or talk normally, as well as fainting, dizziness, or confusion. An overdose can also cause a brain disorder known as toxic leukoencephalopathy.
If you forget to change the patch
If a patch comes off
If you want to stop using the patches
If you have any other questions about using this medication, ask your doctor or pharmacist.
Like all medications, this medication can cause side effects, although not everyone will experience them.
If you, your partner, or the caregiver observes any of the following in the person wearing the patch, remove it and call a doctor or go immediately to the nearest hospital. You may need urgent medical treatment.
The following side effects have also been reported
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)
Not known (frequency cannot be estimated from available data)
You may notice skin rashes, redness, or mild itching at the patch site. This is usually mild and goes away after you remove the patch. If it does not, or if the patch irritates your skin a lot, tell your doctor.
Continued use of the patches can make the medication less effective (it becomes "tolerant" to it) or may cause dependence.
If you switch from another pain reliever to fentanyl or if you suddenly stop using fentanyl, you may experience a withdrawal syndrome such as discomfort, dizziness, nausea, diarrhea, anxiety, or tremors. Inform your doctor if you notice any of these effects.
There have also been reports of newborns suffering from withdrawal effects after their mothers used fentanyl for a long time during pregnancy.
Reporting side effects:
If you experience any side effects, consult your doctor, pharmacist, or nurse, even if they are possible side effects not listed in this leaflet. You can also report them directly through the Spanish Medicines Monitoring System for Human Use: https://www.notificaram.es. By reporting side effects, you can help provide more information on the safety of this medication.
Where should you store the patches
Keep all patches (used and unused) out of sight and reach of children.
Store this medication in a safe and protected place, inaccessible to others. This medication can cause serious harm and even be life-threatening if used accidentally or intentionally by someone who has not been prescribed it.
How long can Fentanilo Matrix Viatris be stored
Do not use Fentanilo Matrix Viatris after the expiration date indicated on the box and the sealed bag. The expiration date is the last day of the month indicated. If the patches have expired, take them to the pharmacy.
This medication does not require special storage conditions.
How to dispose of used or unused patches
A used or unused patch that accidentally sticks to another person, especially a child, can be life-threatening.
Used patches should be folded firmly in half so that they stick together on the adhesive side. They should be disposed of safely; put them back in the original sealed bag and keep them out of sight and reach of others, especially children, until they are eliminated safely. Ask your pharmacist how to dispose of the packaging and medications you no longer need.
Medications should not be thrown down the drain or into the trash. Deposit the packaging and medications you no longer need in the SIGRE collection point at the pharmacy. If in doubt, ask your pharmacist how to dispose of the packaging and medications you no longer need. This way, you will help protect the environment.
Composition of Fentanilo Matrix Viatris
The active ingredient is fentanyl. Each transdermal patch contains 4.2 mg of fentanyl in a 10.5 cm2 area, which releases 25 micrograms of fentanyl per hour.
The other components are:
Acrylic adhesive, siliconized polyester film (protective film), polyethylene terephthalate/ethyl vinyl acetate film (support layer), and white printing ink.
Appearance of the Product and Container Content
Fentanilo Matrix Viatris is a rectangular, translucent patch, printed with white ink and covered with a removable protective film.
The patches contain the following printing: Fentanilo 25 µg/h
The patch is covered by a transparent protective film that is removed before application to expose the adhesive side, allowing it to adhere to the skin.
The patches are individually packaged in heat-sealed envelopes and packaged in a box.
Fentanilo Matrix Viatris is available in packs of 3, 4, 5, 8, 10, 16, and 20 transdermal patches. Not all pack sizes may be marketed.
Marketing Authorization Holder
Viatris Limited
Damastown Industrial Park
Mulhuddart, Dublin 15
Dublin
Ireland
Manufacturer
McDermott Laboratories Limited trading as Gerard Laboratories
35/36/75/76/77/80 Baldoyle Industrial Estate, Grange Road
Dublin 13
Ireland
Or
Mylan Hungary Ltd.
H-2900 Komarom
Mylan utca 1
Hungary
For further information on this medicinal product, please contact the local representative of the marketing authorization holder:
Viatris Pharmaceuticals, S.L.U.
C/ General Aranaz, 86
28027 - Madrid
Spain
This medicinal product is authorized in the Member States of the European Economic Area under the following names:
Germany Fentanyl Mylan 25 Mikrogamm/Stunde, transdermales Pflaster
Denmark Fentanyl Mylan
Spain Fentanilo Matrix Viatris 25 microgramos/hora parches transdérmicos EFG
France Fentanyl Viatris 25 µg/h, dispositif transdermique
Norway Fentanyl Mylan
Netherlands Fentanyl matrixpleister Mylan 25 microgram/uur, pleister voor transdermaal gebruik
Portugal Fentanilo Mylan
Czech Republic Fentanyl Mylan 25 mikrogramu/hodinu, transdermální náplast
Date of the Last Revision of this Leaflet:May 2025
Detailed information on this medicinal product is available on the website of the Spanish Agency for Medicines and Health Products (AEMPS) https://www.aemps.gob.es/
The average price of FENTANIL MATRIX VIATRIS 25 mcg/H TRANSDERMAL PATCHES in October, 2025 is around 14.63 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.
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