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LYFNUA 45 mg FILM-COATED TABLETS

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About the medicine

How to use LYFNUA 45 mg FILM-COATED TABLETS

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This page provides general information and does not replace a doctor’s consultation. Always consult a doctor before taking any medication. Seek urgent medical care if symptoms are severe.

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Introduction

Package Leaflet: Information for the Patient

Lyfnua 45mg film-coated tablets

gefapixant

This medicinal product is subject to additional monitoring, which will allow for quick identification of new safety information. You can help by reporting any side effects you may get. See the end of section 4 for how to report side effects.

Read all of this leaflet carefully before you start taking this medicine, because it contains important information for you.

  • Keep this leaflet, you may need to read it again.
  • If you have any further questions, ask your doctor or pharmacist.
  • This medicine has been prescribed for you only. Do not pass it on to others. It may harm them, even if their signs of illness are the same as yours.
  • If you get any side effects, talk to your doctor or pharmacist. This includes any possible side effects not listed in this leaflet. See section 4.

Contents of the pack

  1. What is Lyfnua and what is it used for
  2. What you need to know before you take Lyfnua
  3. How to take Lyfnua
  4. Possible side effects
  5. Storage of Lyfnua
  6. Contents of the pack and other information

1. What is Lyfnua and what is it used for

Lyfnua contains the active substance gefapixant.

Lyfnua is a medicine used in adults for chronic cough (cough that lasts for more than 8 weeks) and:

  • the cough does not go away even after using other medicines or
  • the reason for the cough is unknown.

The active substance of Lyfnua, gefapixant, blocks the action of the nerves that cause abnormal coughing.

Doctor consultation

Not sure if this medicine is right for you?

Discuss your symptoms and treatment with a doctor online.

2. What you need to know before you take Lyfnua

Do not take Lyfnua

  • if you are allergicto gefapixant or any of the other ingredients of this medicine (listed in section 6).

Warnings and precautions

Tell your doctor or pharmacist before you start taking and while you are taking Lyfnua if:

  • you are allergicto medicines that contain sulfonamide
  • you have sleep apnea- where your breathing stops and starts again while you sleep
  • you develop an acute infection of the lung/lower respiratory system (e.g. pneumonia or bronchitis)
  • you notice a change in the taste of things, loss of tasteor less ability to taste, which continues even after stopping Lyfnua.

Children and adolescents

Do not give this medicine to children and adolescents under 18 years of age. This is because it has not been studied in this age group.

Other medicines and Lyfnua

Tell your doctor or pharmacist if you are taking, have recently taken or might take any other medicines.

Pregnancy and breastfeeding

It is not known if Lyfnua can harm the fetus. Therefore, it is best to avoid using Lyfnua if you are pregnant.

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

Animal studies have shown that Lyfnua can pass into breast milk. A risk to the baby cannot be excluded. You and your doctor must decide whether to take Lyfnua or to breastfeed.

Driving and using machines

You may feel dizzy after taking Lyfnua. If this happens, do not drive or use tools or machines until you feel better.

Lyfnua contains sodium

This medicine contains less than 1 mmol of sodium (23 mg) per tablet; this is essentially “sodium-free”.

3. How to take Lyfnua

Always take this medicine exactly as your doctor or pharmacist has told you. If you are not sure, check with your doctor or pharmacist.

How much to take

The recommended dose of Lyfnua is:

  • one 45 mg tablet twice a day.

Adults with kidney problems

Your doctor may change the amount and frequency you take Lyfnua if:

  • you have severe kidney failure and are not on dialysis.

How to take it

Swallow the tablet whole. Do not break, crush or chew the tablet.

You can take the tablet with or without food.

If you take more Lyfnua than you should

If you take too much Lyfnua, contact a doctor or pharmacist immediately.

If you forget to take Lyfnua

If you miss a dose, skip that dose and take the next dose at the scheduled time.

Do not take a double dose to make up for forgotten doses.

If you have any further questions on the use of this product, ask your doctor or pharmacist.

Medicine questions

Started taking the medicine and have questions?

Discuss your symptoms and treatment with a doctor online.

4. Possible side effects

Like all medicines, this medicine can cause side effects, although not everybody gets them.

Possible side effects are:

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

  • change in the taste of things (such as metallic, bitter or salty taste)
  • having less taste
  • loss of taste

Common(may affect up to 1 in 10 people)

  • feeling sick (nausea)
  • taste different from what it used to be
  • cough (worsening, increase)
  • dry mouth
  • upper respiratory tract infection (an infection in the upper part of the respiratory tract, which includes the nose and throat)
  • diarrhea
  • pain in the mouth or throat
  • having less appetite than usual
  • feeling dizzy
  • pain in the upper abdomen (stomach)
  • indigestion
  • unusual sensations in the mouth (e.g. tingling or itching sensation)
  • loss of sensation in the mouth
  • increased saliva production
  • insomnia (difficulty sleeping)
  • headache

Uncommon(may affect up to 1 in 100 people)

  • kidney stones, in the urine or in the kidney

Reporting of side effects

If you experience 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 national reporting system listed in Appendix V. By reporting side effects, you can help provide more information on the safety of this medicine.

5. Storage of Lyfnua

Keep this medicine out of the sight and reach of children.

Do not use this medicine after the expiry date which is stated on the blister and carton after “EXP”. The expiry date refers to the last day of the month shown.

This medicine does not require any special storage conditions.

Do not use this medicine if you notice that the packaging is damaged or shows signs of tampering.

Medicines should not be disposed of via wastewater or household waste. Ask your pharmacist how to dispose of medicines no longer required. This will help protect the environment.

6. Contents of the pack and other information

What Lyfnua contains

The active substance is gefapixant. Each film-coated tablet contains 45 mg of gefapixant (as citrate).

The other ingredients are silica (colloidal anhydrous) (E 551), crospovidone (E 1202), hypromellose (E 464), magnesium stearate (E 470b), mannitol (E 421), microcrystalline cellulose (E 460), sodium fumarate and stearic acid. The film coating contains the following ingredients: hypromellose (E 464), titanium dioxide (E 171), triacetin (E 1518) and red iron oxide (E 172). The tablets are polished with carnauba wax (E 903).

Appearance and packaging

Lyfnua is a pink, round and convex tablet, engraved with “777” on one side and smooth on the other.

Lyfnua is available in white, opaque PVC/PE/PVdC blisters with a push-through lid, in pack sizes of 28, 56 and 98 film-coated tablets, and in multipacks containing 196 (2 packs of 98) film-coated tablets.

Not all pack sizes may be marketed.

Marketing authorisation holder and manufacturer

Merck Sharp & Dohme B.V.

Waarderweg 39

2031 BN Haarlem

Netherlands

For further information on this medicine, contact the local representative of the marketing authorisation holder:

Belgium

MSD Belgium

Tel: +32(0)27766211

[email protected]

Lithuania

UAB Merck Sharp & Dohme

Tel: +370 5 2780 247

[email protected]

Text in Bulgarian language showing company name Merck Sharp & Dohme Bulgaria, phone number and email address

Luxembourg

MSD Belgium

Tel: +32(0)27766211

[email protected]

Czech Republic

Merck Sharp & Dohme s.r.o.

Tel: +420 233 010 111

[email protected]

Hungary

MSD Pharma Hungary Kft.

Tel: +36 1 888 5300

[email protected]

Denmark

MSD Danmark ApS

Tel: +45 4482 4000

[email protected]

Malta

Merck Sharp & Dohme Cyprus Limited

Tel: 8007 4433 (+356 99917558)

[email protected]

Germany

MSD Sharp & Dohme GmbH

Tel: +49 (0) 89 20 300 4500

[email protected]

Netherlands

Merck Sharp & Dohme B.V.

Tel: 0800 9999000

(+31 23 5153153)

[email protected]

Estonia

Merck Sharp & Dohme OÜ

Tel: +372 614 4200

[email protected]

Norway

MSD (Norge) AS

Tel: +47 32 20 73 00

[email protected]

Greece

MSD Α.Φ.Ε.Ε.

Tel: +30 210 98 97 300

[email protected]

Austria

Merck Sharp & Dohme Ges.m.b.H.

Tel: +43 (0) 1 26 044

[email protected]

Spain

Merck Sharp & Dohme de España, S.A.

Tel: +34 91 321 06 00

[email protected]

Poland

MSD Polska Sp. z o.o.

Tel: +48 22 549 51 00

[email protected]

France

MSD France

Tel: +33 (0) 1 80 46 40 40

Portugal

Merck Sharp & Dohme, Lda

Tel: +351 21 4465700

[email protected]

Croatia

Merck Sharp & Dohme d.o.o.

Tel: +385 1 6611 333

[email protected]

Romania

Merck Sharp & Dohme Romania S.R.L.

Tel: +40 21 529 29 00

[email protected]

Ireland

Merck Sharp & Dohme Ireland (Human Health) Limited

Tel: +353 (0)1 2998700

[email protected]

Slovenia

Merck Sharp & Dohme, inovativna zdravila d.o.o.

Tel: +386 1 520 4201

[email protected]

Iceland

Vistor ehf.

Tel: +354 535 7000

Slovakia

Merck Sharp & Dohme, s. r. o.

Tel: +421 2 58282010

[email protected]

Italy

MSD Italia S.r.l.

Tel: 800 23 99 89 (+39 06 361911)

[email protected]

Finland

MSD Finland Oy

Tel: +358 (0)9 804 650

[email protected]

Cyprus

Merck Sharp & Dohme Cyprus Limited

Tel: 800 00 673 (+357 22866700)

[email protected]

Sweden

Merck Sharp & Dohme (Sweden) AB

Tel: +46 77 5700488

[email protected]

Latvia

SIA Merck Sharp & Dohme Latvija

Tel: +371 67025300

[email protected]

Date of last revision of this leaflet:

Detailed information on this medicine is available on the European Medicines Agency website: https://www.ema.europa.eu

Online doctors for LYFNUA 45 mg FILM-COATED TABLETS

Discuss questions about LYFNUA 45 mg FILM-COATED TABLETS, including use, safety considerations and prescription review, subject to medical assessment and local regulations.

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Doctor

Hocine Lokchiri

General medicine 21 years exp.

Dr. Hocine Lokchiri is a French consultant with over 20 years of experience in General and Emergency Medicine. He works with adults and children, helping patients with urgent symptoms, infections, sudden health changes and everyday medical concerns that require timely evaluation. His background includes clinical practice in France, Switzerland and the United Arab Emirates, which allows him to navigate different healthcare systems and manage a wide range of conditions with confidence. Patients value his calm, structured approach, clear explanations and evidence-based decision-making.

Online consultations with Dr. Lokchiri are suitable for many situations when someone needs quick medical guidance, reassurance or a clear next step. Common reasons for booking include:

  • fever, chills, fatigue and viral symptoms
  • cough, sore throat, nasal congestion, breathing discomfort
  • bronchitis and mild asthma flare-ups
  • nausea, diarrhoea, abdominal pain, digestive infections
  • rashes, allergic reactions, redness, insect bites
  • muscle or joint pain, mild injuries, sprains
  • headache, dizziness, migraine symptoms
  • stress-related symptoms, sleep disturbances
  • questions about test results and treatment plans
  • management of chronic conditions in stable phases
Many patients reach out when symptoms appear suddenly and cause concern, when a child becomes unwell unexpectedly, when a rash changes or spreads, or when it’s unclear whether an in-person examination is necessary. His emergency medicine background is particularly valuable online, helping patients understand risk levels, identify warning signs and choose safe next steps.

Some situations are not suitable for online care. If a patient has loss of consciousness, severe chest pain, uncontrolled bleeding, seizures, major trauma or symptoms suggesting a stroke or heart attack, he will advise seeking immediate local emergency services. This improves safety and ensures patients receive the right level of care.

Dr. Lokchiri’s professional training includes:

  • Advanced Trauma Life Support (ATLS)
  • Basic and Advanced Cardiac Life Support (BLS/ACLS)
  • Pediatric Advanced Life Support (PALS)
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He is an active member of several professional organisations, including the French Society of Emergency Medicine (SFMU), the French Association for Emergency Physicians (AMUF) and the Swiss Society of Emergency and Rescue Medicine (SGNOR). In consultations, he works with clarity and precision, helping patients understand their symptoms, possible risks and the safest treatment options.
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Doctor

Даниэль Чики

Family medicine 24 years exp.

Dr Daniel Cichi is a family medicine doctor with over 20 years of clinical experience. He provides online consultations for adults, supporting patients with acute symptoms, chronic conditions, and everyday health concerns that require timely medical guidance.

His background includes work in emergency care, ambulance services, and family medicine, which allows him to assess symptoms quickly, identify warning signs, and help patients choose the safest next steps – whether that means home care, treatment adjustment, or in-person evaluation.

Patients commonly consult Dr Daniel Cichi for:

  • acute symptoms: fever, infections, flu-like illness, cough, sore throat, shortness of breath;
  • chest discomfort, palpitations, dizziness, fatigue, and blood pressure concerns;
  • digestive problems: abdominal pain, nausea, diarrhoea, constipation, reflux;
  • muscle, joint, and back pain, minor injuries, post-traumatic symptoms;
  • chronic conditions: hypertension, diabetes, high cholesterol, thyroid disorders;
  • review and interpretation of lab tests, imaging reports, and medical documents;
  • medication review and treatment adjustment;
  • medical advice while travelling or living abroad;
  • second opinions and guidance on whether in-person care is needed.
Dr Cichi’s consultations are structured and practical. He focuses on clear explanations, risk assessment, and actionable recommendations, helping patients understand their symptoms and make informed decisions about their health.
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Doctor

Yevgen Yakovenko

General surgery 12 years exp.

Dr. Yevgen Yakovenko is a licensed surgeon and general practitioner in Spain and Germany. He specialises in general, paediatric, and oncological surgery, internal medicine, and pain management. He offers online consultations for adults and children, combining surgical precision with therapeutic support. Dr Yakovenko works with patients across different countries and provides care in Ukrainian, Russian, English, and Spanish.

Areas of medical expertise:

  • Acute and chronic pain: headaches, muscle and joint pain, back pain, abdominal pain, postoperative pain. Identifying the cause, selecting treatment, and creating a care plan.
  • Internal medicine: heart, lungs, gastrointestinal tract, urinary system. Management of chronic conditions, symptom control, second opinions.
  • Pre- and postoperative care: risk assessment, decision-making support, follow-up after surgery, rehabilitation strategies.
  • General and paediatric surgery: hernias, appendicitis, congenital conditions, both planned and urgent surgeries.
  • Injuries and trauma: bruises, fractures, sprains, soft tissue damage, wound care, dressing, referral when in-person care is required.
  • Oncological surgery: diagnosis review, treatment planning, and long-term follow-up.
  • Obesity treatment and weight management: a medical approach to weight loss, including assessment of underlying causes, evaluation of comorbidities, development of a personalised plan (nutrition, physical activity, pharmacotherapy if needed), and ongoing progress monitoring.
  • Imaging interpretation: analysis of ultrasound, CT, MRI, and X-ray results, surgical planning based on imaging data.
  • Second opinions and medical navigation: clarifying diagnoses, reviewing current treatment plans, helping patients choose the best course of action.

Experience and qualifications:

  • 12+ years of clinical experience in university hospitals in Germany and Spain.
  • International education: Ukraine – Germany – Spain.
  • Member of the German Society of Surgeons (BDC).
  • Certified in radiological diagnostics and robotic surgery.
  • Active participant in international medical conferences and research.

Dr Yakovenko explains complex topics in a clear, accessible way. He works collaboratively with patients to analyse health issues and make evidence-based decisions. His approach is grounded in clinical excellence, scientific accuracy, and respect for each individual.

If you are unsure about a diagnosis, preparing for surgery, or want to discuss your test results – Dr Yakovenko will help you evaluate your options and move forward with confidence.

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Doctor

Lina Travkina

Family medicine 13 years exp.

Dr. Lina Travkina is a licensed family and preventive medicine doctor based in Italy. She provides online consultations for adults and children, supporting patients across all stages of care – from acute symptom management to long-term health monitoring and prevention.

Areas of medical care include:

  • Respiratory conditions: colds, flu, acute and chronic bronchitis, mild to moderate pneumonia, bronchial asthma.
  • ENT and eye conditions: sinusitis, tonsillitis, pharyngitis, otitis, infectious and allergic conjunctivitis.
  • Digestive issues: gastritis, acid reflux (GERD), IBS, dyspepsia, bloating, constipation, diarrhoea, functional bowel symptoms, intestinal infections.
  • Urological and infectious diseases: acute and recurrent cystitis, bladder and kidney infections, prevention of recurrent UTIs, asymptomatic bacteriuria.
  • Chronic conditions: hypertension, diabetes, hypercholesterolemia, metabolic syndrome, thyroid disorders, excess weight.
  • Neurological and general symptoms: headache, migraine, dizziness, fatigue, sleep disturbances, reduced concentration, anxiety, asthenia.
  • Chronic pain support: back, neck, joint, and muscle pain, tension syndromes, pain associated with osteochondrosis and chronic conditions.

Additional care areas:

  • Preventive consultations and check-up planning.
  • Medical advice and follow-up consultations.
  • Test interpretation and diagnostic guidance.
  • Structured support for undiagnosed complaints.
  • Second opinion on diagnoses and treatment plans.
  • Nutritional and lifestyle support for vitamin deficiencies, anaemia, metabolic issues.
  • Post-operative recovery support and pain management.
  • Preconception counselling and postpartum support.
  • Immunity support and strategies to reduce frequency of infections.

Dr. Travkina combines evidence-based medicine with an attentive, personalised approach. Her consultations focus not only on treatment, but also on prevention, recovery, and long-term wellbeing.

If during the consultation it becomes clear that your case requires in-person assessment or specialised care outside of her scope, the session will be terminated and the payment fully refunded.

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€70
5.0 (764)
Doctor

Alina Tsurkan

Family medicine 13 years exp.

Dr. Alina Tsurkan is a licensed family medicine physician based in Portugal, offering online consultations for adults and children. She provides professional primary care, with a focus on prevention, accurate diagnosis, and long-term management of acute and chronic conditions.

Dr. Tsurkan supports patients with a wide range of health issues, including:

  • Respiratory infections: cold, flu, bronchitis, pneumonia, and lingering coughs.
  • ENT conditions: sinusitis, tonsillitis, otitis (ear infections), sore throat, allergic rhinitis.
  • Eye conditions: allergic or infectious conjunctivitis, red eyes, irritation.
  • Digestive issues: acid reflux (GERD), gastritis, irritable bowel syndrome (IBS), constipation, bloating, nausea.
  • Urinary and reproductive health: urinary tract infections (UTIs), cystitis, prevention of recurrent infections.
  • Chronic diseases: hypertension, elevated cholesterol, weight management.
  • Neurological complaints: headaches, migraines, sleep disturbances, fatigue, general weakness.
  • Children’s health: fever, infections, digestive issues, follow-ups, vaccination guidance.

She also provides:

  • IMT medical certificates for driving licence exchange in Portugal.
  • Personalised preventive care and wellness consultations.
  • Interpretation of test results and medical reports.
  • Follow-up care and medication review.
  • Support in managing multiple coexisting conditions.
  • Remote prescription management and medical documentation.

Dr. Tsurkan’s approach is evidence-based and holistic. She works closely with each patient to develop an individualised care plan that addresses both symptoms and root causes. Her goal is to empower patients to take control of their health and maintain well-being through lifestyle adjustments, routine check-ups, and early intervention.

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Doctor

Anna Biriukova

General medicine 6 years exp.

Dr Anna Biriukova is an internal medicine doctor with clinical experience in cardiology, endocrinology, and gastroenterology. She provides online consultations for adults, offering expert medical support for heart health, hormonal balance, digestive issues, and general internal medicine.

Cardiology – Diagnosis and treatment of:

  • High blood pressure, blood pressure fluctuations, and cardiovascular risk prevention.
  • Chest pain, shortness of breath, arrhythmias (tachycardia, bradycardia, palpitations).
  • Leg swelling, chronic fatigue, reduced exercise tolerance.
  • EKG interpretation, lipid profile evaluation, cardiovascular risk assessment (heart attack, stroke).
  • Post-COVID-19 cardiac monitoring and care.
Endocrinology – Diabetes, thyroid, metabolism:
  • Diagnosis and management of type 1 and type 2 diabetes, and prediabetes.
  • Individual treatment plans including oral medications and insulin therapy.
  • GLP-1 therapy– modern pharmacological treatment for weight management and diabetes control, including drug selection, monitoring, and safety follow-up.
  • Thyroid disorders – hypothyroidism, hyperthyroidism, autoimmune thyroid diseases (Hashimoto’s, Graves’ disease).
  • Metabolic syndrome – obesity, lipid disorders, insulin resistance.
Gastroenterology – Digestive health:
  • Abdominal pain, nausea, heartburn, gastroesophageal reflux (GERD).
  • Stomach and intestinal conditions: gastritis, irritable bowel syndrome (IBS), indigestion.
  • Management of chronic digestive disorders and interpretation of tests (endoscopy, ultrasound, labs).
General internal medicine and preventive care:
  • Respiratory infections – cough, colds, bronchitis.
  • Lab test analysis, therapy adjustments, medication management.
  • Adult vaccinations – planning, contraindications assessment.
  • Cancer prevention – screening strategies and risk assessment.
  • Holistic approach – symptom relief, complication prevention, and quality of life improvement.
Dr Biriukova combines internal medicine with specialist insight, offering clear explanations, personalised treatment plans, and comprehensive care tailored to each patient.
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€60

Frequently Asked Questions

Is a prescription required for LYFNUA 45 mg FILM-COATED TABLETS?
LYFNUA 45 mg FILM-COATED TABLETS requires a prescription in Spain. You can check with a doctor online whether this medicine may be appropriate for your situation.
What is the active substance in LYFNUA 45 mg FILM-COATED TABLETS?
The active ingredient in LYFNUA 45 mg FILM-COATED TABLETS is gefapixant. This information helps identify medicines with the same composition but different brand names.
Who manufactures LYFNUA 45 mg FILM-COATED TABLETS?
LYFNUA 45 mg FILM-COATED TABLETS is manufactured by Merck Sharp & Dohme B.V.. Pharmacy brands and packaging may differ depending on the distributor.
Which doctors can assess the use of LYFNUA 45 mg FILM-COATED TABLETS online?
Doctors such as Family doctors, Psychiatrists, Dermatologists, Cardiologists, Endocrinologists, Gastroenterologists, Pulmonologists, Nephrologists, Rheumatologists, Hematologists, Infectious disease physicians, Allergists, Geriatricians, Paediatricians, Oncologists may assess whether LYFNUA 45 mg FILM-COATED TABLETS is appropriate, depending on your situation and local regulations. You can book an online consultation to discuss your symptoms and possible next steps.
What are the alternatives to LYFNUA 45 mg FILM-COATED TABLETS?
Other medicines with the same active substance (gefapixant) include ANGITUSS 6mg/mL SYRUP, BISOLVON CALMATOS 2.13 mg/ml ORAL SOLUTION, BRONCHOSTOP NITE ORAL SOLUTION. These may have different brand names or formulations but contain the same therapeutic ingredient. Always consult a doctor before switching or starting a new medicine.
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