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Flurbiprofen lozenges

Strefen

Suck one lozenge every three to six hours if needed, but do not use more than five a day.

Move the lozenge around your mouth whilst you are sucking it. This will help prevent any irritation in your mouth.

Side-effects are uncommon and are usually mild.

Do not take or use any other anti-inflammatory painkillers whilst using these lozenges.

At a glance

  • Flurbiprofen lozenges are a non-steroidal anti-inflammatory drug (NSAID) for sore throat relief.

  • Suck one lozenge every three to six hours, but no more than five in 24 hours.

  • Do not use for more than three days unless advised by a doctor.

  • Common side-effects include mouth irritation or indigestion.

  • See a doctor if your sore throat is severe, unusual, or does not improve in 3-4 days.

Continue reading below

About flurbiprofen lozenges

Type of medicine

Non-steroidal anti-inflammatory drug (NSAID)

Used for

Relief of sore throat

Also called

Strefen®

Available as

Lozenges

A sore throat usually goes after a few days. Simple treatments that you can buy can ease symptoms until the sore throat goes. Usually, you would only need to see a doctor if your symptoms are severe, unusual, or do not ease within 3-4 days.

Flurbiprofen belongs to the group of medicines known as non-steroidal anti-inflammatory drugs (NSAIDs). These medicines are used to relieve pain and swelling (inflammation). Flurbiprofen lozenges are used to ease the symptoms of a sore throat. You can buy them without a prescription at pharmacies.

Some medicines are not suitable for people with certain conditions, and sometimes a medicine may only be used if extra care is taken. For these reasons, before you start using flurbiprofen lozenges it is important that your doctor or pharmacist knows:

  • If you have asthma or any other allergic disorder.

  • If you have ever had a stomach or duodenal ulcer, or if you have an inflammatory bowel disorder such as Crohn's disease or ulcerative colitis.

  • If you are pregnant or breastfeeding.

  • If you are under 12 or over 65 years of age.

  • If you have liver or kidney problems.

  • If you have a heart condition, or a problem with your blood vessels or circulation.

  • If you have high blood pressure.

  • If you have ever had blood clotting problems.

  • If you have an inflammatory condition called systemic lupus erythematosus (also called lupus, or SLE).

  • If you are taking any other medicines. This includes any medicines you are taking which are available to buy without a prescription, as well as herbal and complementary medicines.

  • If you have ever had an allergic reaction to any other NSAID (such as aspirin, ibuprofen, diclofenac, and indometacin), or to any other medicine.

Continue reading below

  • Before using these lozenges, read the manufacturer's printed information leaflet from inside the pack and take them exactly as directed.

  • You can suck one flurbiprofen lozenge every three to six hours if needed. Move the lozenge around in your mouth as you allow it to slowly dissolve. Do not use more than five lozenges in any 24-hour period.

  • You should not use flurbiprofen lozenges for more than three days unless you have been directed to do so by your doctor.

  • Have plenty to drink, even though it is tempting not to drink very much when it is painful to swallow. You may become mildly lacking in fluid in the body (dehydrated) if you don't drink much, particularly if you also have a high temperature (fever).

  • If your sore throat does not begin to feel better within three days, ask for further advice from your pharmacist or doctor.

  • If you buy any medicines, check with a pharmacist that they are safe to take alongside these lozenges. You should not take or use any other anti-inflammatory painkillers (such as aspirin, ibuprofen, diclofenac, and naproxen).

Continue reading below

Along with their useful effects, most medicines can cause unwanted side-effects although not everyone experiences them. These usually improve as your body adjusts to the new medicine, but speak with your doctor or pharmacist if any of the following side-effects continue or become troublesome.

Possible flurbiprofen side-effects

What can I do if I experience this?

Mouth irritation or ulcers

Moving the lozenges around your mouth as they are dissolving will help prevent this

Indigestion, feeling sick (nausea), tummy (abdominal) discomfort

Try sucking the lozenges after a small snack or milky drink

Headache, unusual taste

These are usually mild and do not last long, but if you are concerned, ask your pharmacist for advice

Skin rash or allergic-type reactions

Avoid taking any further doses. Speak with your doctor or pharmacist if symptoms continue

If you experience any other symptoms which you think may be due to this medicine, speak with your doctor or pharmacist.

  • Keep all medicines out of the reach and sight of children.

  • Store in a cool, dry place, away from direct heat and light.

Important information about all medicines

Never take more than the prescribed dose. If you suspect that you or someone else might have taken an overdose of this medicine, go to the accident and emergency department of your local hospital at once. Take the container with you, even if it is empty.

This medicine is for you. Never give it to other people even if their condition appears to be the same as yours.

Do not keep out-of-date or unwanted medicines. Take them to your local pharmacy which will dispose of them for you.

If you have any questions about this medicine ask your pharmacist.

MHRA - Reporting adverse reactions

Report suspected side effects to medicines, vaccines, e-cigarettes, medical device incidents, defective or falsified (fake) products to the Medicines and Healthcare products Regulatory Agency to ensure safe and effective use.

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Unsure about mixing medicines?

Check for possible interactions between medicines, supplements and foods before taking them together.

Frequently asked questions

How long do flurbiprofen lozenges take to work to relieve a sore throat?

The article states that flurbiprofen lozenges are used to ease the symptoms of a sore throat. While it doesn't specify an exact timeframe for relief, it does mention that a sore throat usually goes after a few days and that these lozenges help until then. If your sore throat does not begin to feel better within three days, you should seek further advice.

Can I use flurbiprofen lozenges if I am taking other regular medication?

Yes, but you need to be cautious. Before using flurbiprofen lozenges, it's important to tell your doctor or pharmacist about any other medicines you are taking, including those available without a prescription, as well as herbal and complementary medicines. This is because some medicines are not suitable to be taken together.

What should I do if I am experiencing side-effects from flurbiprofen lozenges?

Most medicines can cause unwanted side-effects, but these usually improve as your body adjusts. If you experience side-effects like mouth irritation or ulcers, move the lozenges around your mouth as they dissolve. For indigestion, feeling sick, or tummy discomfort, try sucking the lozenges after a small snack or milky drink. Headaches or an unusual taste are usually mild. If a side-effect continues, becomes troublesome, or you develop a skin rash or allergic-type reaction, stop taking the lozenges and speak with your doctor or pharmacist.

Can children use flurbiprofen lozenges for a sore throat?

Flurbiprofen lozenges are not suitable for children under 12 years of age. You should consult a doctor or pharmacist for appropriate advice regarding sore throat relief for children in this age group.

How do flurbiprofen lozenges help with a sore throat?

Flurbiprofen belongs to a group of medicines called non-steroidal anti-inflammatory drugs (NSAIDs). These types of medicines work by relieving both pain and swelling (inflammation). By reducing inflammation, flurbiprofen lozenges help to ease the symptoms of a sore throat.

Is it safe to drink alcohol while using flurbiprofen lozenges?

The article does not specifically mention alcohol consumption while using flurbiprofen lozenges. However, it is generally recommended to discuss all medications and potential interactions with a pharmacist or doctor.

Further reading and references

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About the authorView full bio

Author image

Michael Stewart, MRPharmS

Medicine Leaflet Review Manager – Contractor, Pharmacist

BPharm (Hons), MRPharmS

Michael is a community pharmacist practicing in the Midlands and South Yorkshire with more than 20 years’ experience advising on medicines and medical conditions. He has a strong background in healthcare training, having produced and delivered training courses for pharmacy teams and staff of residential care settings, including nurses. He has also contributed to pharmacy advisory boards for the management of low acuity conditions in the community.

About the reviewer

Author image

Sid Dajani

Sultan Dajani qualified at the London School of Pharmacy in 1994 and became the youngest elected member of the Royal Pharmaceutical Society council since its founding in 1842.

Article history

The information on this page is written and peer reviewed by qualified clinicians.

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