PACKAGE LEAFLET: INFORMATION FOR THE USER
Doloxital25micrograms/hour transdermal patch EFG
Fentanyl
Read all of this leaflet carefully before you start using this medicine because it contains important information for you.
Contents of the pack:
This medicine is called Doloxital.
The patches help to relieve severe and long-lasting pain:
Doloxital contains a medicine called fentanyl. It belongs to a group of strong pain-relieving medicines called opioids.
Do not use Doloxital
Do not use this medicine if you or your child are in any of the above situations. If you are not sure, consult your doctor or pharmacist before using Doloxital.
Warnings and precautions
If the patch sticks 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 the patch sticking accidentally to another person through close physical contact or sharing the same bed as the patch wearer. If the patch sticks accidentally to another person (especially a child), the medicine in the patch can pass through the skin of the other person and can cause serious side effects, such as breathing difficulties, with slow or weak breathing that can be life-threatening. If the patch sticks to another person's skin, it should be removed immediately and medical attention should be sought.
Be careful withDoloxital
Consult your doctor or pharmacist beforeusing this medicine if you are in any of the following situations. Your doctor will need to monitor you more closely:
If you have any of the above conditions (or if you are not sure), consult your doctor or pharmacist before using Doloxital
While using the patch, tell your doctor if you have breathing problems while sleeping.Opioids like Doloxital can cause sleep-related breathing disorders such as sleep apnea (pauses in breathing while sleeping) and sleep-related hypoxemia (low oxygen levels 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 treatment.
Side effects andDoloxital
You can find the complete list of possible side effects in section 4.
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 Doloxital. 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 to increase the dose or gradually reduce the use of Doloxital.
Dependence and addiction
This medicine contains fentanyl, which is an opioid. It can cause dependence and/or addiction.
Repeated use of Doloxital 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 higher doses and longer use. Dependence or addiction can lead to a feeling of loss 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 Doloxital may be greater if:
If you notice any of the following symptoms while using Doloxital, it could be a sign of dependence or addiction.
If you notice any of these signs, consult your doctor to determine the best course of treatment for you, when it is appropriate to stop the medicine, and how to do it safely.
While wearing the patch, do not expose it to direct heat, such as heat pads, electric blankets, hot water bottles, water beds, heat lamps, or sunlamps. Do not take sunbaths or have prolonged hot baths, and do not use saunas or hot tubs. If you do, you may increase the amount of medicine released from the patch.
Withdrawal symptoms when stopping Doloxital
Do not stop using this medicine suddenly. You may experience withdrawal symptoms such as restlessness, difficulty sleeping, irritability, agitation, anxiety, feeling your heartbeat (palpitations), increased blood pressure, feeling sick, diarrhea, loss of appetite, tremors, chills, or sweating. If you want to stop using this medicine, talk to your doctor first. Your doctor will tell you how to do it, usually by gradually reducing the dose so that the unpleasant withdrawal effects are minimized.
Other medicines and Doloxital
Tell your doctor or pharmacist if you are taking, have recently taken, or might take any other medicines.
This includes medicines bought without a prescription and herbal medicines. You should also tell your pharmacist if you are using Doloxital when you buy any medicines from the pharmacy.
Your doctor will know which medicines can be taken safely with Doloxital. You may need to be closely monitored if you are taking any of the following types of medicines or if you stop taking any of the following types of medicines, as this may affect the dose of Doloxital you need.
In particular, tell your doctor or pharmacist if you are taking:
Using Doloxital with antidepressants
The risk of side effects increases if you are taking medicines such as certain antidepressants. Doloxital can interact with these medicines, and you may experience changes in your mental state, such as agitation, 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 (these could be signs of serotonin syndrome). If used together, your doctor may want to monitor you closely to detect these side effects, especially when starting treatment or when changing the dose of the medicine.
Using Doloxital with central nervous system depressants, including alcohol and some narcotics
Using Doloxital and sedative medicines such as benzodiazepines or related medicines at the same time increases the risk of feeling drowsy, having breathing difficulties (respiratory depression), coma, and can be life-threatening. Because of this, using them together should only be considered when no other treatment is possible.
However, if your doctor prescribes Doloxital with sedative medicines, the dose and duration of concurrent use should be limited by your doctor.
Tell your doctor about all sedative medicines you are taking, and follow your doctor's dosage recommendation. It may be helpful to inform friends or relatives to be aware of the signs and symptoms mentioned above. Consult your doctor if you experience any symptoms.
Do not drink alcohol while using Doloxital, unless you have talked to your doctor first.
Operations
If you think you are going to have an operation, tell your doctor or dentist that you are using Doloxital.
Pregnancy and breastfeeding
If you are pregnant, think you may be pregnant, or plan to become pregnant, consult your doctor or pharmacist before using this medicine.
Doloxital should not be used during pregnancy, unless you have discussed it with your doctor.
Doloxital should not be used during labor, as the medicine can affect the breathing of the newborn baby.
Long-term use of Doloxital during pregnancy can cause withdrawal symptoms in your newborn baby, such as high-pitched crying, irritability, convulsions, poor feeding, and diarrhea, which can be life-threatening if not recognized and treated. Talk to your doctor immediately if you think your baby may have withdrawal symptoms.
Do not use Doloxital if you are breastfeeding. You should not breastfeed for 3 days after removing the Doloxital patch. This is because the medicine can pass into breast milk.
Driving and using machines
Doloxital can affect your ability to drive or use machines or tools, as it can make you feel drowsy or dizzy. If this happens, do not drive or use machines or tools. Do not drive while using this medicine until you know how it affects you.
Talk to your doctor or pharmacist if you have any doubts about whether it is safe for you to drive while using this medicine.
Doloxital contains soya oil
This medicine contains soya oil. It should not be used if you are allergic to peanuts or soya.
Before starting treatment and regularly during treatment, your doctor will also explain what you can expect from using Doloxital, 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, "Symptoms of withdrawal from stopping Doloxital").
Follow the administration instructions for this medication exactly as indicated by your doctor. In case of doubt, consult your doctor or pharmacist again.
Your doctor will decide which concentration of Doloxital is most suitable for you, taking into account the intensity of your pain, your general condition, and the type of pain treatment you have received so far.
How to apply and change 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
Children
Adults and children:
Do not apply the patch to
How to apply the patch
Step 1: Prepare the skin
Step 2: Open the envelope
Step 3: Peel and press
Step 4: Dispose of the patch
Step 5: Wash your hands
More information on using Doloxital
Daily activities during patch use
How long do the patches take to work?
How long will you need to use the patches?
If the pain worsens
If you use too many patches or a patch with the wrong dose
If you have applied too many patches or a patch with the wrong dose, remove them and contact your doctor immediately or you can also call the Toxicology Information Service, phone: 91 562 04 20, indicating the medication and the amount applied.
Signs of overdose include breathing problems or weak breathing, fatigue, extreme drowsiness, inability to think clearly or walk or talk normally, and dizziness, dizziness, or confusion. An overdose can also cause a brain disorder known as toxic leukoencephalopathy.
In case of overdose or incorrect dose, remove the patches and contact your doctor or pharmacist immediately or call the Toxicology Information Service, phone: 91 562 04 20, indicating the medication and the amount administered.
If you forget to change the patch
If the 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 gets them.
If you, your partner, or caregiver notice any of the following signs in the person wearing the patch, remove the patch and call a doctor or go to the nearest hospital immediately. You may need urgent medical treatment.
Follow the above recommendations and make the person wearing the patch move and talk as much as possible. In very rare cases, these breathing difficulties can be life-threatening or even fatal, especially in people who have not used strong opioid pain relievers before (such as Doloxital or morphine). (Uncommon, may affect up to 1 in 100 patients).
These can be signs of a severe allergic reaction. (Frequency cannot be estimated from available data).
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 side effects (may affect up to 1 in 1,000 people)
Unknown frequency (cannot be estimated from available data)
You may notice rashes, redness, or mild itching of the skin at the patch application site. It is usually mild and disappears after removing the patch. If it does not, or if the patch irritates your skin a lot, inform your doctor.
Repeated use of patches can make the medication less effective (you get used to it or become more sensitive to pain) or can cause dependence.
If you switch from another pain reliever to Doloxital or if you stop using Doloxital abruptly, you may experience withdrawal symptoms, such as dizziness, feeling sick, diarrhea, anxiety, or tremors. Inform your doctor if you notice any of these effects.
There have also been reports of newborns experiencing withdrawal symptoms after their mothers used Doloxital for a prolonged period during pregnancy.
Reporting side effects
If you experience any side effects, consult your doctor or pharmacist, even if they are possible side effects not listed in this 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 medication.
Where to store the patches
Keep all patches (used and unused) out of sight and reach of children.
Store in the original envelope to protect it from light. This medication does not require any special storage temperature.
Store this medication in a safe and protected place, where others cannot access it. This medication can cause serious harm and even be fatal if used accidentally or intentionally by people who have not been prescribed it.
How long can you store Doloxital
Do not use this medication after the expiration date shown on the box and on the envelope after CAD. The expiration date is the last day of the month indicated. If the patches are expired, take them to the pharmacy.
How to dispose of used or unused patches
Accidental exposure of another person to used and unused patches, especially children, can be fatal.
Used patches should be folded firmly in half, so that the adhesive side sticks to itself. Then, they should be thrown away safely by putting them in the original envelope and keeping them out of sight and reach of others, especially children, until they are disposed of safely. Unused patches should be returned to the pharmacy.
Medications should not be thrown down the drain or into the trash. Deposit the packaging and medications you no longer need at the SIGRE collection point in 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.
Each transdermal patch contains 5.1 mg of fentanyl in an area of 8.5 cm2 and releases 25 micrograms of fentanyl per hour
The other components are:
Matrix components:
Aloe vera oil extract (based on soybean tocopherol acetate), colophony resin, poly(2-ethylhexyl acrylate, vinyl acetate) (50:50).
Removable coating:
Polyethylene terephthalate, polyester, siliconized.
Supporting film:
Polyethylene terephthalate laminate, printing ink.
Appearance and packaging of the product
Transdermal patch.
Opaque, colorless, rectangular patch with rounded corners and printed on the supporting film: "Fentanyl 25 µg/h" in individually sealed pouches
Doloxital is available in packs of 5, 10, and 20 transdermal patches.
Only some pack sizes may be marketed.
Marketing authorization holder:
Aristo Pharma Iberia, S.L.
C/ Solana, 26
28850 - Torrejón de Ardoz
Madrid, Spain
Manufacturer:
Luye Pharma AG
Am Windfeld 35
83714 Miesbach
Germany
Or
Laboratorios Medicamentos Internacionales, S.A. (Medinsa)
C/Solana, 26
28850, Torrejón de Ardoz
Madrid, Spain
This medicinal product is authorized in the Member States of the European Economic Area and in the United Kingdom (Northern Ireland) under the following names:
Germany: Fenylat 25 Mikrogramm/Stunde transdermales Pflaster
Spain: Doloxital 25 microgramos/hora parche transdérmico EFG
United Kingdom (Northern Ireland): Fenylat 25 micrograms/hour transdermal patch
This leaflet was approved in April 2025
Detailed information on this medicinal product is available on the website of the Spanish Agency for Medicines and Health Products (AEMPS): http://www.aemps.gob.es/
The average price of DOLOXITAL 25 micrograms/hour 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.