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Cynril 400 micrograms Compressed lozenges with Integral Oromucosal Applicator – patient leaflet, side effects, dosage

Last updated: · Text from the MHRA, as of · About this document

Medicine status: Prescription only (POM) Details

Medicine strength:
400 micrograms
Contains active substance:
ATC code:
Similar medicines:

Patient leaflet - Cynril 400 micrograms Compressed lozenges with Integral Oromucosal Applicator

1. What Cynril is and what it is used for

Cynril contains the active substance fentanyl which is a strong pain-relieving medicine known as an opioid.

The Cynril unit comes as a lozenge on a stick.

  • It is used to treat breakthrough pain in adults and adolescents aged 16 years

    and above with cancer who are already taking other opioid pain medicines for their persistent (around-the-clock) cancer pain. Breakthrough pain is additional sudden pain that occurs suddenly in spite of your having taken your usual opioid pain-relieving medicines.

2. What you need to know before you take Cynril

Do not use Cynril:

  • If you are not regularly using a prescribed opioid medicine (e.g. codeine, fentanyl,

    hydromorphone, morphine, oxycodone, pethidine), every day on a regular schedule, for at least a week, to control your persistent pain. If you have not been using these medicines you must not use Cynril, because it may increase the risk of your breathing becoming dangerously slow and/or shallow, or even stop.

  • If you are allergic to fentanyl or any of the other ingredients of this medicine (listed in

    Section 6).

  • If you are currently taking monoamine-oxidase inhibitor (MAOI) (medicines for severe

    depression) or have taken them in the past 2 weeks (see section 2 under Serotonin syndrome).

  • If you have severe breathing problems or severe lung problems where you have an

    obstruction.

  • If you suffer from short-term pain (e.g. pain from injuries, surgery, headaches or

    migraines) other than breakthrough pain.

  • If you are being treated with medicinal products containing sodium oxybate.

Do not use Cynril if any of the above apply to you. If you are not sure, talk to your doctor or pharmacist before using Cynril.

Warnings and precautions:

Keep using the opioid pain medicine you take for your persistent (around-the-clock) cancer pain during your Cynril treatment.

Store this medicine in a safe and secure place, where other people cannot access it (see section 5. How to store Cynril for more information).

Talk to your doctor or pharmacist before taking Cynril if:

  • Your other opioid pain medicine for your persistent (around-the-clock) cancer pain is

    not stabilised yet.

  • You have any illness that affects your breathing (such as asthma, wheezing, or shortness

    of breath).

  • You have a head injury or have had any loss of consciousness.
  • You have problems with your heart especially slow heart rate.
  • You have liver or kidney problems - this will affect how your system breaks down the

    medicine.

  • You have low blood pressure due to a low amount of fluid in your circulation.
  • You have diabetes.
  • You are over 65 years old - you may need a lower dose and any dose increase will be

    reviewed very carefully by your doctor.

  • You use benzodiazepines (see section 2 under “Other medicines and Cynril”). Using

    benzodiazepines can increase the chances of getting serious side effects including death.

  • You use antidepressants or antipsychotics (selective serotonin inhibitors (SSRIs),

    serotonin norepinephrine reuptake inhibitors [SNRIs], monoamine oxidase (MAO) inhibitors; see section 2 under “Do not use Cynril” and “Other medicines and Cynril”). The use of these medicines with Cynril can lead to a serotonin syndrome a potentially life-threatening condition (see section 2 under “Other medicines and Cynril”).

  • You have ever abused or been dependent on opioids or any other drug, alcohol or illegal

    drugs.

  • You have ever developed adrenal insufficiency, a condition in which the adrenal glands

    do not produce enough hormones, or lack of sex hormones (androgen deficiency) with opioid use (see section 4 under “Serious side effects”).

  • You drink alcohol; please refer to section “Cynril with food and drink and alcohol”.

Consult your doctor WHILE using Cynril if:

  • You experience pain or increased sensitivity to pain (hyperalgesia) which does not

    respond to a higher dosage of your medicine as prescribed by your doctor.

  • You exhibit signs of dental decay. Cynril contains approximately 2 grams of sugar

    frequent use exposes you to an increased risk of dental decay that may be serious. It is important to take good care of your teeth during treatment with Cynril. Visit your dentist regularly during treatment.

  • You experience a combination of the following symptoms: nausea, vomiting, anorexia,

    fatigue, weakness, dizziness and low blood pressure. Together these symptoms may be a sign of a potentially life-threatening condition called adrenal insufficiency, a condition in which the adrenal glands do not produce enough hormones.

Long-term use and tolerance

This medicine contains fentanyl which is an opioid medicine. Repeated use of opioid painkillers can result in the drug being less effective (you become accustomed to it, known as drug tolerance). You may also become more sensitive to pain while using Cynril. This is known as hyperalgesia. Increasing the dose of Cynril may help to further reduce your pain for a while, but it may also be harmful. If you notice that your medicine becomes less effective, talk to your doctor. Your doctor will decide whether it is better for you to increase the dose or to gradually decrease your use of Cynril.

Dependence and addiction

Repeated use of Cynril can also lead to dependence, abuse and addiction which may result in life-threatening overdose. The risk of these side effects can increase with a higher dose and longer duration of use. Dependence or addiction can make you feel that you are no longer in control of how much medicine you need to use or how often you need to use it. You might feel that you need to carry on using your medicine, even when it doesn’t help to relieve your pain. The risk of becoming dependent or addicted varies from person to person. You may have a greater risk of becoming dependent or addicted on Cynril if:

  • You or anyone in your family have ever abused or been dependent on alcohol,

    prescription medicines or illegal drugs (“addiction”).

  • You are a smoker.
  • You have ever had problems with your mood (depression, anxiety or a personality

    disorder) or have been treated by a psychiatrist for other mental illness.

    If you notice any of the following signs whilst using Cynril, it could be a sign that you have become dependent or addicted.

    • You need to use the medicine for longer than advised by your doctor
    • You need to use more than the recommended dose
    • You are using the medicine for reasons other than prescribed, for instance, ‘to stay calm’ or ‘help you sleep’
    • You have made repeated, unsuccessful attempts to quit or control the use of the medicine
    • When you stop taking the medicine you feel unwell (e.g. nausea, vomiting, diarrhoea, anxiety, chills, tremor, and sweating), and you feel better once using the medicine again (‘withdrawal effects’)

If you notice any of these signs, speak to your doctor to discuss the best treatment pathway for you, including when it is appropriate to stop and how to stop safely.

Sleep-related breathing disorders

Cynril can cause sleep-related breathing disorders such as sleep apnoea (breathing pauses during sleep) and sleep related hypoxemia (low oxygen level in the blood). The symptoms can include breathing pauses during sleep, night awakening due to shortness of breath, difficulties to maintain sleep or excessive drowsiness during the day. If you or another person observe these symptoms, contact your doctor. A dose reduction may be considered by your doctor.

Seek URGENT medical advice if:

  • You experience symptoms such as difficulty in breathing or dizziness, swelling of the tongue, lip or throat while using Cynril. These might be early symptoms of a serious allergic reaction (anaphylaxis, hypersensitivity; see section 4 under “Serious side effects”)

Children and adolescents

This medicine is not recommended for children and adolescents below 16 years of age.

Other medicines and Cynril

Do not use this medicine and tell your doctor or pharmacist:

  • if you are taking other fentanyl treatments that have been prescribed for your breakthrough pain in the past. If you still have some of these fentanyl treatments at home, check with your pharmacist how to dispose of them.
  • if you are using monoamine oxidase (MAO) inhibitors (medicines for severe depression)

    or have taken them in the past 2 weeks (see section 2 under Warnings and precautions – Serotonin syndrome).

Tell your doctor or pharmacist before using Cynril if you are taking or have recently taken or might take any other medicines:

This includes medicines obtained without a prescription, including herbal medicines. In particular, tell your doctor or pharmacist if you are taking any of the following medicines:

  • Please tell your doctor about all sedative medicines which might make you sleepy such as sleeping pills, medicines to treat anxiety, some medicines for allergic reaction (antihistamines), or tranquillisers.
  • Some muscle relaxants (such as baclofen or diazepam).
  • Any medicines or other substances that might have an effect on the way in which your body breaks down Cynril, such as: grapefruit juice, drugs used to treat fungal infections, ritonavir or other medications that help control the HIV virus (AIDS) or other medicines called “CYP3A4 inhibitors” such as ketoconazole, itraconazole or fluconazole (used for fungal infections) and troleandomycin, clarithromycin or erythromycin (medicines for bacterial infections) and so-called “CYP3A4 inducers” such as rifampin or rifabutin (for bacterial infections), carbamazepine, phenobarbital or phenytoin (medicines used to treat convulsions/fits).
  • Certain types of strong painkillers, called partial agonist/antagonists e.g.

    buprenorphine, nalbuphine and pentazocine (medicines for treatment of pain). You could experience symptoms of withdrawal syndrome (nausea, vomiting, diarrhoea, anxiety, chills, tremor, and sweating) while using these medicines.

  • Some painkillers for nerve pain (gabapentin and pregabalin)
  • Serotonergic medicinal products used to treat depression (antidepressants: such as selective serotonin reuptake inhibitors [SSRIs] and serotonin norepinephrine reuptake inhibitors [SNRIs]) or antipsychotics. The use of these medicines with Cynril can lead to serotonin syndrome a potentially life-threatening condition (see section 2 under Serotonin syndrome). The symptoms of serotonin syndrome may include mental status changes (e.g. agitation, hallucinations, coma), and other effects such as body temperature above 38°C, increase in heart rate, unstable blood pressure, and exaggeration of reflexes, muscular rigidity, lack of coordination and/ or gastrointestinal symptoms (e.g. nausea, vomiting, diarrhoea). Your doctor will tell you whether Cynril is suitable for you.
  • Concomitant use of Cynril and sedative medicines such as benzodiazepines or related drugs increases the risk of drowsiness, difficulties in breathing (respiratory depression), coma and may be life-threatening. Because of this, concomitant use should only be considered when other treatment options are not possible. However if your doctor does prescribe Cynril together with sedative medicines the dose and duration of concomitant treatment should be limited by your doctor. Please tell your doctor about all sedative medicines you are taking, and follow your doctor’s dose recommendation closely. It could be helpful to inform friends or relatives to be aware of the signs and symptoms stated above. Contact your doctor when experiencing such symptoms.

If you are due to have surgery requiring a general anaesthetic speak with your doctor or nurse.

Cynril with food and drink and alcohol

  • Cynril can be used before or after meals. However, do not use during a meal.
  • You may drink some water before using Cynril to moisten the mouth. However, you should not drink or eat anything while using Cynril.
  • Do not drink grapefruit juice while using Cynril. This is because it may affect the way your body breaks down Cynril.
  • Do not drink alcohol while on treatment with Cynril. It can increase the chances of getting serious side effects, including death.

Pregnancy, breastfeeding and fertility

If you are pregnant or breastfeeding, you think you may be pregnant or planning to have a baby, ask your doctor or pharmacist before using this medicine.

Pregnancy

Cynril should not be used during pregnancy unless you have discussed this with your doctor. If Cynril is used for a long time during pregnancy, there is also a risk of the newborn child having withdrawal symptoms which might be life-threatening if not recognised and treated by a doctor (see section 4).

You should not use Cynril during childbirth because fentanyl may cause respiratory depression in the newborn child.

Breastfeeding

Fentanyl can get into breast milk and may cause side effects in the breast-fed infant. Do not use Cynril if you are breastfeeding. You should not start breastfeeding until at least 5 days after the last dose of Cynril.

Driving and using machines

This medicine may affect you being able to drive or use any tools or machines. Talk to your doctor about whether it is safe for you to drive or use any tools or machines in the first few hours after using Cynril.

Do not drive or use any tools or machines if you: feel sleepy or dizzy; have blurred or double vision; have difficulty in concentrating. It is important you know how you react to Cynril before driving or using any tools or machines.

The medicine can affect your ability to drive as it may make you sleepy or dizzy.

  • Do not drive while taking this medicine until you know how it affects you.
  • It is an offence to drive if this medicine affects your ability to drive.

However, you would not be committing an offence if:

  • The medicine has been prescribed to treat a medical or dental problem and
  • You have taken it according to the instructions given by the prescriber or in the information provided with the medicine and
  • It was not affecting your ability to drive safely

Talk to your doctor or pharmacist if you are not sure whether it is safe for you to drive while taking this medicine

Cynril contains glucose

This medicine contains glucose (as hydrated dextrates). If you have been told by your doctor that you have an intolerance to some sugars, contact your doctor before taking this medicinal product.

Glucose containing lozenges of Cynril may be harmful to your teeth.

Information on sodium content

This medicine contains less than 1 mmol sodium (23 mg) per lozenge, that is to say essentially ‘sodium-free’.

https://fontus.wistia.com/medias/chga68uowr

297mm

3. How to use Cynril

Always use this medicine exactly as your doctor or pharmacist has told you. Check with your doctor or pharmacist if you are not sure.

Before starting treatment and regularly during treatment, your doctor will also discuss with you what you may expect from using Cynril, when and how long you need to take it, when to contact your doctor, and when you need to stop it (see also section 2). When you first start using Cynril, your doctor will work with you to find the dose that will relieve your breakthrough pain. It is very important that you use Cynril exactly as the doctor tells you.

When you place Cynril in your mouth:

  • The lozenge dissolves and the active substance is released. It takes around 15

    minutes for this to happen.

  • The active substance is absorbed through the lining of your mouth, into the

    blood system. Using the medicine like this allows it to be absorbed quickly. This means that it relieves your breakthrough pain quickly.

While the right dose is being found

You should start to feel some relief quickly while you are using Cynril. However, while you and the doctor are finding out the dose that controls your breakthrough pain, you may not get enough pain relief up to 30 minutes after starting to use one Cynril unit (15 minutes from when you finish using the Cynril unit). If this happens, your doctor may allow you to use a second Cynril unit of the same strength for that same episode of breakthrough pain. Do not use a second unit unless your doctor tells you to. Never use more than two units to treat a single episode of breakthrough pain. While the right dose is being found, you may need to have more than one strength of Cynril units at home. However, keep only the strengths of Cynril you need in the house. This is to stop possible confusion or overdose. Talk to your pharmacist about how to dispose of any Cynril units you do not need.

How many units should be used

Once the right dose has been found with your doctor, use 1 unit for an episode of breakthrough pain. Talk to your doctor if your right dose of Cynril does not relieve your breakthrough pain for several episodes of breakthrough pain in a row. Your doctor will decide if your dose needs to be changed.

You must tell your doctor straight away if you are using Cynril more than four times per day. This is because he may wish to change your medicine for your persistent (around-the-clock) pain. When he has done this, when your persistent pain has been controlled, he may need to change your dose of Cynril.

If your doctor suspects Cynril-related increased sensitivity to pain (hyperalgesia), a reduction of your Cynril dose may be considered (see section 2 under “Warnings and precautions”).

For the most effective relief, tell your doctor about your pain and how Cynril is working for you. This is so that the dose can be changed if needed.

How to take Cynril

Opening the package

  • Each Cynril unit is sealed in its own blister package. Do not open the package until

    you are ready to use Cynril.

  • Hold the blister package with the printed side away from you.
  • Hold the short tab end of the blister package.
  • Put the scissors close to the end of the Cynril unit and cut the

    long tab end completely off (as shown).

  • Separate the printed backing from the blister package and pull

    the printed packing completely off from the blister package.

  • Remove the Cynril unit from the blister pack and put the lozenge in your mouth

    straight away.

Using the Cynril unit

  • Put the lozenge between your cheeks and gum.
  • Using the handle, keep moving Cynril around in your mouth especially along your

    cheeks. Twirl the handle often.

  • To get the most effective relief, finish the Cynril completely in 15 minutes. If you

    finish too quickly, you will swallow more of the medicine and get less relief from your breakthrough pain.

  • Do not bite or chew the lozenge. This would mean lower levels of Fentanyl in your

    blood and less pain relief than when used as directed.

  • If for some reason you are not finishing the whole lozenge each time you have

    breakthrough pain, talk to your doctor.

How often you should use Cynril

Once a dose is found that effectively controls your pain, do not use more than four units of Cynril per day. If you think you might need to use more than four Cynril units per day, talk to your doctor straight away

How many Cynril units you should use

Do not use more than two units to treat any single episode of breakthrough pain.

If you use more Cynril than you should

The most common side effects of using too much Cynril are feeling sleepy, sick or dizzy.

  • If you begin to feel dizzy, sick, or very sleepy before the lozenge is completely

    dissolved, take it out of your mouth and call another person in your house to help you. A serious side effect of Cynril is slow and/or shallow breathing. This can occur if your dose of Cynril is too high or if you take too much Cynril. In severe cases taking too much Cynril may also lead to coma.

  • If this happens, get medical help straight away.

An overdose may also result in a brain disorder known as toxic leukoencephalopathy.

What to do if a child or adult accidentally takes Cynril

If you think someone has accidentally taken Cynril, get medical help straight away. Try to keep the person awake (by calling their name and shaking their arm or shoulder) until emergency help arrives.

If you forget to use Cynril

If you still have breakthrough pain, you may use Cynril as your doctor has told you. If the breakthrough pain disappears, do not use Cynril until the next breakthrough pain.

If you stop using Cynril

You should normally stop taking Cynril when you no longer have any breakthrough pain. You must however continue to take your usual opioid pain-relieving medicine to treat your persistent cancer pain as advised by your doctor, unless your doctor tells you to stop. You may experience withdrawal symptoms similar to the possible side effects of Cynril when discontinuing Cynril. If you experience withdrawal symptoms or if you are concerned about your pain relief you should contact your doctor. Your doctor will evaluate if you need medicine to reduce or eliminate the withdrawal symptoms.

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 have side effects, although not everybody gets them. If you notice any of these, contact your doctor.

Serious side effects

The most serious side effects are shallow breathing, low blood pressure and shock. You or your carer should REMOVE the Cynril unit from your mouth, contact your doctor immediately and call for emergency help if you experience any of the following serious side effects- you may need urgent medical attention:

  • Becoming very sleepy or having slow and/or shallow breathing.
  • Difficulty in breathing or dizziness, swelling of the tongue, lip or throat which may

    be early signs of serious allergic reaction.

Note to carers:

If you see that the patient taking Cynril has slow and/or shallow breathing or if you have a hard time waking the person up, take the following steps IMMEDIATELY:

  • Using the handle, remove the Cynril unit from the person’s mouth and keep it out

    of reach of children or pets until the Cynril unit is disposed of.

  • CALL FOR EMERGENCY HELP.
  • While waiting for emergency help, if the person seems to be breathing slowly,

    prompt them to breathe every 5-10 seconds.

If you feel excessively dizzy, sleepy or otherwise ill while taking Cynril, use the handle to remove the Cynril unit and dispose of it according to the instructions given in this leaflet (see section 5). Then contact your doctor for further directions on using Cynril.

Contact your doctor if you experience a combination of the following symptoms

Nausea, vomiting, loss of appetite, tiredness, weakness, dizziness and low blood pressure. Together these symptoms may be a sign of a potentially life-threatening condition called adrenal insufficiency, a condition in which the adrenal glands do not produce enough hormones.

Prolonged treatment with fentanyl during pregnancy may cause withdrawal symptoms in the newborn which can be life threatening (see section 2 under “Pregnancy, breastfeeding and fertility”).

Other side effects

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

  • Vomiting, nausea/feeling sick, constipation, stomach (abdominal) pain.
  • Asthenia (weakness), sleepiness, dizziness, headaches.
  • Shortness of breath.

Common side effects (may affect up to 1 in 10 people):

  • Confusion, anxiety, seeing or hearing things that are not there (hallucinations), depression, mood swings.
  • Feeling unwell.
  • Muscle jerks, feeling of dizziness or “spinning”, loss of consciousness, sedation, tingling or numbness, difficulty coordinating movements, increased or altered sensitivity to touch, convulsions (fits).
  • Dry mouth, mouth inflammation, tongue problems (e.g. burning sensation or ulcers), taste alteration.
  • Wind, abdominal bloating, indigestion, decreased appetite, weight loss.
  • Blurred or double vision.
  • Sweating, skin rash, itchy skin.
  • Difficulty passing urine.
  • Accidental injury (e.g. falls).

Uncommon side effects (may affect up to 1 in 100 people):

  • Tooth decay (that can lead to teeth removal).
  • Paralysis of the gut, mouth ulcers, gum bleeding.
  • Coma, slurred speech.
  • Abnormal dreams, feeling detached, abnormal thinking, excessive feeling of well being.
  • Widening of blood vessels.
  • Hives.

Not known (frequency cannot be estimated from the available data): They have also reported the following side effects with the use of Cynril but how often that can occur is not known:

  • Receding gums, inflammation of the gum, tooth loss, severe breathing problems, flushing, feeling very warm, diarrhoea, swelling of arms or legs, fatigue, insomnia, pyrexia, withdrawal syndrome (may manifest by the occurrence of the following side effects nausea, vomiting, diarrhoea, anxiety, chills, tremor and sweating).
  • Drug tolerance, drug dependence (addiction) (see section 2).
  • Drug abuse (see section 2).
  • Lack of sex hormones (androgen deficiency).
  • Delirium (symptoms may include a combination of agitation, restlessness, disorientation, confusion, fear, seeing or hearing things that are not really there, sleep disturbance, nightmares).
  • Trouble breathing during sleep
  • Bleeding at the site of application.

Prolonged treatment with fentanyl during pregnancy may cause withdrawal symptoms in the newborn which can be life-threatening (see section 2). While using Cynril you may experience irritation, pain and ulcers in the application site and gum bleeding.

Reporting of side effects

If you get any side effects, talk to your doctor or pharmacist. This includes any possible side effects not listed in this leaflet. You can also report side effects directly via the Yellow Card Scheme. Website: www.mhra.gov.uk/yellowcard or search for MHRA Yellow Card in the Google Play or Apple App Store. By reporting side effects you can help provide more information on the safety of this medicine.

5. How to store Cynril

The pain-relieving medicine in Cynril is very strong and could be life-threatening if taken accidentally by a child. Cynril must be kept out of sight and reach of children.

  • Do not use Cynril after the expiry date shown on the package label and the carton.

    The expiry date refers to the last day of that month.

  • Do not store above 25°C.
  • Always keep Cynril in its blister package until you are ready to use it. Do not use if the blister package has been damaged or opened before you are ready to use it. Do not throw away any medicines via wastewater or household waste. Ask your pharmacist how to throw away medicines you no longer use. These measures will help protect the environment.

Where you should keep Cynril

Store this medicine in a safe and secure place, where other people cannot access it. It can cause serious harm and be fatal to people who may take this medicine by accident, or intentionally when it has not been prescribed for them. How to dispose of Cynril after use

Partially used units of Cynril may still contain enough medicine to be harmful or life-threatening to a child.

Even if there is a little or no medicine left on the handle, the handle itself must be properly disposed of as follows:

  • If there is no medicine, put the applicator in a waste container that is out of reach of children and pets.
  • If any medicine remains on the applicator, put the lozenge under hot running water to dissolve the remainder and then put the applicator in a waste container that is out of reach of children and pets.
  • If you do not finish the entire unit of Cynril and can not dissolve the remains of the drug immediately, put the unit of Cynril out of reach of children and pets until you have time to dispose of the partially used unit of Cynril as explained above.
  • Do not flush a partially used lozenge, handles, or the blister packaging down the toilet.

6. Contents of the pack and other information

What Cynril contains: The active substance is fentanyl. Each individual lozenge contains either 200, 400, 600, 800, 1200 or 1600 micrograms of fentanyl (as citrate). The other ingredients are:

Lozenge:

Dextrates hydrated, citric acid, disodium hydrogenphosphate, artificial flavour berry (tapioca starch, arabic gum (E-414) and Triacetine), magnesium stearate. Edible glue used to attach the lozenge to the applicator:

starch maize, hydrated dextrates, water.

Applicator:

ABS resin

Printing ink: Ethanol, Water, Purified Shellac (E904), Acetone, FD&C Blue No.1 (E133 Brilliant Blue FCF), Ammonium Hydroxide (E527)

What Cynril looks like and contents of the pack

Cynril is a system for administering medication directly through the lining of the mouth. Each unit consists of a white to slightly yellowish cylindrical lozenge attached to a handle for oromucosal application.

The unit is normally white, however, during storage can acquire a slightly mottled appearance. This does not affect in any way the action of the medicine. Cynril is available in six different doses: 200, 400, 600, 800, 1200 and 1600 micrograms. The dose is marked on the white lozenge in the applicator in the blister and on the carton to ensure that you use the appropriate medication and dosage. Each dose is associated with a specific color.

Each blister package contains one unit of Cynril supplied in boxes of 1, 3, 15 or 30 individual Cynril units.

Not all pack sizes may be marketed.

Latest approved information, patient information leaflet, educational material and video on this medicine are available by scanning the QR code included in this leaflet with a smartphone/device. The same information is also available on the following URL: https://fontus.wistia.com/medias/chga68uowr

Marketing Authorisation Holder and Manufacturer

Marketing Authorisation Holder

Fontus Health Ltd.

60 Lichfield Street

Walsall

WS4 2BX

United Kingdom

Manufacturer:

PRASFARMA,

S.L.C/Sant Joan 11-15

08560

Manlleu (Barcelona)

Spain

This leaflet was last revised in March 2025

PIL_200032019_v8 297mm

About this document

Source: MHRA - Medicines and Healthcare products Regulatory Agency (products.mhra.gov.uk) · Marketing authorisation: PL 42924/0014

Last revision stated in the text: March 2025 · MHRA data as of 13 October 2026

Found a mistake? Tell us on the contact page.

The information on this site does not replace the advice of a doctor or pharmacist.

Facts about Cynril 400 micrograms Compressed lozenges with Integral Oromucosal Applicator

Prescription needed? Yes, prescription-only medicine (POM)
Active substance Fentanyl
Strength 400 micrograms
Pharmaceutical form Cynril is a white or slightly yellowish cylindrical lozenge of 17 – 20 mm of thickness and 11 – 12 mm of diameter, on which its respective dosage strength is printed, attached to a plastic handle at the opposite end also labelled with the dosage strength. The lozenges may develop brownish spots during storage.
Excipients Dextrates hydrated, Citric acid, anhydrous, Disodium phosphate, anhydrous, Magnesium stearate, Artificial berry flavour (main components Tapioca starch, Arabic gum (E-414) and Triacetine), Maize starch, Water, purified, Ethanol,, Water,, Purified Shellac (E904),, Acetone,, FD&C Blue No.1 (E133 Brilliant Blue FCF),, Ammonium Hydroxide (E527)
Is it available? Listed as available (NHS Dictionary of Medicines and Devices – not a record of current supplies)
Shelf life 3 years
Storage Do not store above 25°C
Drug group (ATC) Opioid analgesic, phenylpiperidone derivative
  1. N Nervous system drugs
    1. N02 Analgesics
      1. N02A Opioid analgesics
        1. N02AB Phenylpiperidine derivatives, opioid analgesics
          1. N02AB03 fentanyl
Marketing authorisation PL 42924/0014 (first authorised 4 August 2025)
Marketing authorisation holder Fontus Health Ltd

Sources: the MHRA product information (products.mhra.gov.uk) and the NHS Dictionary of Medicines and Devices (dm+d), release 10.2.0 of 19 October 2026, NHS Business Services Authority. Contains public sector information licensed under the Open Government Licence v3.0.