ZASTEN 0.2 mg/ml ORAL SOLUTION

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Doctor
5.0(36)

Andrei Popov

General medicinePain medicine7 years of experience

Dr. Andrei Popov is a family physician with specialized training in the management of chronic pain. He provides video consultations for adults in Spain and across Europe: whether you have been living with pain for months that no one has been able to properly explain, or you need to resolve a health issue without waiting weeks for an appointment.

His approach is clear: to listen, organize your case, and provide you with a practical roadmap based on evidence-based medicine and adapted to your medical history and personal needs.

Pain: how he can help

  • Chronic pain (more than 3 months
  • Migraine and recurrent or high-intensity headaches
  •  Neck, lower back, back and joint pain
  •  Post-traumatic pain after injuries or surgeries
  •  Pain of neurological origin: neuralgia, neuropathic pain, fibromyalgia

General medicine

  • Frequent respiratory infections (cold, flu, persistent cough)
  • Hypertension, diabetes and metabolic disorders
  • Review of laboratory tests and MRI/CT reports (explained in clear language)
  • Preventive medicine and health monitoring
  • Second opinions and treatment adjustments (when clinically appropriate)

What the consultation is like
 Each session lasts up to 30 minutes. We review symptoms, medical history, medications and any tests you provide, and you finish the consultation with a clear treatment plan, defined next steps, and criteria to understand when follow-up may be needed. If warning signs are detected, he will clearly advise whether you need in-person care or urgent medical attention.

Book a video appointment
€86
This page is for general information. Consult a doctor for personal advice. Call emergency services if symptoms are severe.
About the medicine

How to use ZASTEN 0.2 mg/ml ORAL SOLUTION

Contents of the leaflet

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

Introduction

Package Leaflet: Information for the User

Zasten 0.2 mg/ml Oral Solution

ketotifeno

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 and other information

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

1. What is Zasten and what is it used for

Zasten is an antihistamine medicine.

Zasten is indicated in the following cases:

  • Prevention and treatment of rhinitis and cutaneous allergic reactions, as well as any other allergic manifestation.

Zasten is indicated in adults and children over 6 months.

You should consult a doctor if it worsens or does not improve.

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 Zasten

Do not take Zasten:

  • if you are allergic to ketotifeno or any of the other ingredients of this medicine (listed in section 6),
  • if you are epileptic,
  • if you are taking any medicine for the treatment of diabetes.

Do not administer to breastfeeding women.

Warnings and precautions

Consult your doctor or pharmacist before taking Zasten:

  • if you are taking asthma medications such as systemic corticosteroids and adrenocorticotropic hormone (ACTH),
  • if you are taking diabetes medications, as your doctor may request a blood test,
  • if you are epileptic, as you need to be under medical supervision,
  • if you notice that your attention capacity decreases, as you will need to modify the dose.

Children

Zasten can be used in children over 6 months.

Children need a higher dose per kg of body weight than adults to achieve the same results.

See in the section Zasten contains maltitol liquid (E-965), methylparaben sodium salt (E-219), propylparaben sodium salt (E-217) sodium and benzyl alcoholthe effect of benzyl alcohol on children.

Elderly patients

There are no special requirements for this group of patients.

Patients with renal or hepatic impairment

No studies have been conducted in this type of patient, however, it is possible that the metabolism of Zasten may be slightly different. If you have renal or hepatic impairment, consult your doctor before using this medicine. See in the section Zasten contains maltitol liquid (E-965), methylparaben sodium salt (E-219), propylparaben sodium salt (E-217) sodium and benzyl alcoholthe effect of benzyl alcohol on hepatic or renal disease.

Taking Zasten with other medicines

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

In particular, tell your doctor or pharmacist if you are taking:

  • asthma medications,
  • medicines to help you sleep,
  • pain medications,
  • medicines that contain antihistamines such as cold or flu medications,
  • diabetes medications,
  • bronchodilators,
  • anticoagulants.

These medicines may be affected by Zasten and interfere with its absorption or effect. Your doctor may need to change the dose of the medicines you are taking or even change the medication.

Taking Zasten with food, drinks and alcohol

You can take Zasten with or without food.

You should avoid consuming alcohol during treatment with Zasten. Alcohol may increase the risk of side effects.

Pregnancy, breastfeeding and fertility

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 taking this medicine.

Tell your doctor immediately if you become pregnant during treatment with Zasten.

Zasten is excreted in breast milk, so its use is not recommended in breastfeeding women.

See in the section Zasten contains maltitol liquid (E-965), methylparaben sodium salt (E-219), propylparaben sodium salt (E-217) sodium and benzyl alcoholthe effect of benzyl alcohol on pregnancy and breastfeeding.

Driving and using machines

During the first days of treatment, Zasten may have a sedative effect, so it is recommended to act with caution when driving a vehicle or operating machinery.

Zasten contains maltitol liquid (E-965), methylparaben sodium salt (E-219), propylparaben sodium salt (E-217) sodium and benzyl alcohol

This medicine contains maltitol liquid (E-965). If your doctor has told you that you have an intolerance to some sugars, consult with them before taking this medicine.

It may cause allergic reactions (possibly delayed) because it contains methylparaben sodium salt (E-219) and propylparaben sodium salt (E-217).

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

This medicine contains 0.013 mg of benzyl alcohol in each ml.

Benzyl alcohol may cause allergic reactions.

Consult your doctor or pharmacist if you are pregnant or breastfeeding. This is because large amounts of benzyl alcohol can accumulate in your body and cause side effects (metabolic acidosis).

Consult your doctor or pharmacist if you have liver or kidney disease. This is because large amounts of benzyl alcohol can accumulate in the body and cause side effects (metabolic acidosis).

Benzyl alcohol has been associated with the risk of serious side effects including respiratory problems ("gasping syndrome") in children.

Do not administer this medicine to your newborn (up to 4 weeks of age) unless your doctor has recommended it.

This medicine should not be used for more than one week in children under 3 years of age unless your doctor or pharmacist has indicated it.

3. How to take Zasten

Follow exactly the administration instructions of this medicine indicated by your doctor or pharmacist. In case of doubt, consult your doctor or pharmacist again.

Your doctor will indicate the duration of your treatment with Zasten. Do not stop treatment before, as it may worsen your condition and produce undesirable effects.

Zasten is administered orally. Take a little water immediately after administration of Zasten 0.2 mg/ml oral solution.

The recommended dose is:

Adults

5 ml (1 mg of ketotifeno) of Zasten 0.2mg/ml oral solution twice a day (with breakfast and dinner). In necessary cases, your doctor may increase the dose up to 4 mg per day, i.e., 10 ml (2 mg of ketotifeno) administered twice a day.

Use in children and adolescents

Children from 6 months to 3 years

0.25 ml (0.05 mg of ketotifeno) of Zasten per kg of body weight twice a day (in the morning and at night). For example, a 10 kg child will receive 2.5 ml of Zasten 0.2 mg/ml oral solution in the morning and at night.

Children over 3 years

5 ml (1 mg of ketotifeno) of Zasten twice a day with breakfast and dinner.

In some cases, children may need higher doses in mg/kg of body weight than those necessary for adults.

If you take more Zasten than you should

If you think you or anyone else has taken more Zasten than you should, consult your doctor or pharmacist immediately or go to the nearest hospital.

A too high dose may cause: drowsiness, confusion, disorientation, tachycardia and hypotension, convulsions or hyperexcitability, especially in children.

In cases of overdose or accidental ingestion, consult your doctor or pharmacist immediately or call the Toxicology Information Service. Phone 91 562 04 20 indicating the medicine and the amount ingested.

If you forget to take Zasten

Do not take a double dose to make up for the forgotten dose. If you forget to take a dose, take it as soon as you can. However, if it is almost time for the next dose, wait for the next dose and take it at the usual time.

If you stop treatment with Zasten

If it is necessary to interrupt your treatment with Zasten, inform your doctor. Do not change or interrupt your treatment without first consulting your doctor, he will gradually reduce the dose until the treatment is completely finished (2-4 weeks). This is done to avoid the symptoms of your disease from appearing again.

If you have any other questions about the use of this medicine, 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, Zasten can cause side effects, although not everybody gets them.

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

  • Agitation
  • Irritability
  • Sleep problems (insomnia)
  • Nervousness

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

  • Dizziness
  • Burning when urinating and frequent and urgent need to urinate (cystitis)
  • Dry mouth

Rare side effects (may affect up to 1 in 1,000 people)

  • Drowsiness
  • Weight gain

Very rare side effects (may affect up to 1 in 10,000 people)

  • Itching or reddened skin, blisters on the lips, eyes and mouth accompanied by fever, chills, cough and body pain.
  • Yellowing of the skin and eyes, stools and urine colored (symptoms of jaundice, liver disorders, hepatitis)

If you experience any of these side effects, tell your doctor immediately.

Side effects of unknown frequency(cannot be estimated from the available data)

  • Seizures, headache
  • Nausea, vomiting and diarrhea
  • Hives and rashes.

1 At the beginning of treatment, drowsiness, dry mouth and dizziness may appear, which disappear spontaneously without the need to interrupt treatment.

2 Central nervous system stimulation symptoms, such as nervousness, excitement, irritability and sleep problems, have been described, particularly in children.

Reporting of side effects:

If you experience any side effects, talk to your doctor or pharmacist, even if it is possible side effects not listed in this leaflet. You can also report them directly through the Spanish Medicines Monitoring System for Human Use: http://www.notificaram.es. By reporting side effects, you can help provide more information on the safety of this medicine.

5. Storing Zasten

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

This medicine does not require special storage conditions.

Keep in the original package.

Do not use Zasten 0.2 mg/ml oral solution if you notice that the package is damaged or has been tampered with.

Do not use this medicine after the expiry date which is stated on the package after EXP. The expiry date is the last day of the month shown.

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

6. Contents of the pack and other information

Composition of Zasten

  • The active substance is ketotifeno (DCI). Each ml contains 0.2 mg of ketotifeno.
  • The other ingredients (excipients) are: maltitol liquid (E-965), disodium phosphate anhydrous, methylparaben sodium salt (E-219), propylparaben sodium salt (E-217), anhydrous citric acid, strawberry flavor (contains benzyl alcohol) and purified water.

Appearance of the product and contents of the pack

It is presented in the form of an oral solution. Each bottle contains 150 ml of oral solution.

Marketing authorization holder and manufacturer

Marketing authorization holder

Alfasigma S.p.A.

Via Ragazzi del ‘99, n. 5 – 40133 Bologna. ITALY

Manufacturer

Delpharm Orleans

5 Avenue de Concyr - 45071 Orleans Cedex 2. FRANCE

You can request more information about this medicine by contacting the local representative of the marketing authorization holder:

Alfasigma España, S.L.

C/ Aribau 195, 4º

08021 Barcelona. Spain

Date of the last revision of this leaflet: July 2021

Detailed and updated information on this medicine is available on the website of the Spanish Agency for Medicines and Health Products (AEMPS) http://www.aemps.gob.es

  • ZASTEN 0.2 mg/ml ORAL SOLUTION
  • Country of registration
  • Dosage form
    ORAL SOLUTION/SUSPENSION, 0.2 mg/ml
  • ATC code
    R06AX17
  • Average pharmacy price
    4.56 EUR
  • Active substance
  • Prescription required
    Yes
  • Manufacturer
  • Composition
    PARAHIDROXIBENZOATO DE METILO SODICO (E-219) (0,7 mg mg), MALTITOL LIQUIDO E965 (800 mg mg), PARAHIDROXIBENZOATO DE PROPILO SODICO (0,3 mg mg), FOSFATO DISODICO (2,84 mg mg)
  • Alternatives to ZASTEN 0.2 mg/ml ORAL SOLUTION
    Dosage form: TABLET, 20 mg
    Active substance: bilastine
    Prescription required
    Dosage form: TABLET, 20 mg
    Active substance: bilastine
    Prescription not required
    Dosage form: ORAL SOLUTION/SUSPENSION, 0.5 mg
    Active substance: desloratadine
    Manufacturer: Organon N.V.
    Prescription required

Online doctors for ZASTEN 0.2 mg/ml ORAL SOLUTION

Discuss questions about ZASTEN 0.2 mg/ml ORAL SOLUTION, including use, safety considerations and prescription review, subject to medical assessment and local regulations.

Doctor
5.0(36)

Andrei Popov

General medicinePain medicine7 years of experience

Dr. Andrei Popov is a family physician with specialized training in the management of chronic pain. He provides video consultations for adults in Spain and across Europe: whether you have been living with pain for months that no one has been able to properly explain, or you need to resolve a health issue without waiting weeks for an appointment.

His approach is clear: to listen, organize your case, and provide you with a practical roadmap based on evidence-based medicine and adapted to your medical history and personal needs.

Pain: how he can help

  • Chronic pain (more than 3 months
  • Migraine and recurrent or high-intensity headaches
  •  Neck, lower back, back and joint pain
  •  Post-traumatic pain after injuries or surgeries
  •  Pain of neurological origin: neuralgia, neuropathic pain, fibromyalgia

General medicine

  • Frequent respiratory infections (cold, flu, persistent cough)
  • Hypertension, diabetes and metabolic disorders
  • Review of laboratory tests and MRI/CT reports (explained in clear language)
  • Preventive medicine and health monitoring
  • Second opinions and treatment adjustments (when clinically appropriate)

What the consultation is like
 Each session lasts up to 30 minutes. We review symptoms, medical history, medications and any tests you provide, and you finish the consultation with a clear treatment plan, defined next steps, and criteria to understand when follow-up may be needed. If warning signs are detected, he will clearly advise whether you need in-person care or urgent medical attention.

Book a video appointment
€86
Doctor
5.0(12)

Yevgen Yakovenko

Family medicine12 years of experience

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.

Book a video appointment
€72
Doctor
5.0(3)

Lina Travkina

Family medicine13 years of experience

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.

Book a video appointment
€75
Doctor
5.0(19)

Nuno Tavares Lopes

Family medicineGeneral medicine18 years of experience

Dr. Nuno Tavares Lopes is a licensed physician in Portugal with 17 years of experience in emergency medicine, family and general practice, and public health. He is the Director of Medical and Public Health Services at an international healthcare network and serves as an external consultant for the WHO and ECDC.

  • Emergency care: infections, fever, chest/abdominal pain, minor injuries, paediatric emergencies
  • Family medicine: hypertension, diabetes, cholesterol, chronic disease management
  • Travel medicine: pre-travel advice, vaccinations, fit-to-fly certificates, travel-related illnesses
  • Sexual and reproductive health: PrEP, STD prevention, counselling, treatment
  • Weight management and wellness: personalised weight loss programmes, lifestyle guidance
  • Skin and ENT issues: acne, eczema, allergies, rashes, sore throat, sinusitis
  • Pain management: acute and chronic pain, post-surgical care
  • Public health: prevention, health screenings, long-term monitoring
  • Sick leave (Baixa médica) connected to Segurança Social in Portugal
  • IMT medical certificates for driving licence exchange
Dr. Nuno Tavares Lopes provides medical support for patients using GLP-1 medications (Mounjaro, Wegovy, Ozempic, Rybelsus) as part of a weight loss strategy. He offers individualised treatment planning, regular follow-up, dose adjustment, and advice on combining medication with sustainable lifestyle changes. Consultations follow the medical standards accepted in Europe.

Dr. Lopes also provides interpretation of medical tests, follow-up care for complex patients, and multilingual support. Whether for urgent concerns or long-term care, he helps patients act with clarity and confidence.

Book a video appointment
€70

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Frequently Asked Questions

Is a prescription required for ZASTEN 0.2 mg/ml ORAL SOLUTION?

ZASTEN 0.2 mg/ml ORAL SOLUTION 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 ZASTEN 0.2 mg/ml ORAL SOLUTION?

The active ingredient in ZASTEN 0.2 mg/ml ORAL SOLUTION is ketotifen. This information helps identify medicines with the same composition but different brand names.

How much does ZASTEN 0.2 mg/ml ORAL SOLUTION cost in pharmacies?

The average pharmacy price for ZASTEN 0.2 mg/ml ORAL SOLUTION is around 4.56 EUR. Prices may vary depending on the manufacturer and dosage form.

Who manufactures ZASTEN 0.2 mg/ml ORAL SOLUTION?

ZASTEN 0.2 mg/ml ORAL SOLUTION is manufactured by Alfasigma S.P.A.. Pharmacy brands and packaging may differ depending on the distributor.

Which doctors can assess the use of ZASTEN 0.2 mg/ml ORAL SOLUTION 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 ZASTEN 0.2 mg/ml ORAL SOLUTION is appropriate, depending on your situation and local regulations. You can book an online consultation to discuss your symptoms and possible next steps.

How to buy ZASTEN 0.2 mg/ml ORAL SOLUTION in Spain?

Spain has a well-developed healthcare infrastructure across major cities such as Madrid, Barcelona, Valencia, and Seville. Pharmacies are widely available and operate under strict regulations, ensuring access to prescribed medications.

You can buy ZASTEN 0.2 mg/ml ORAL SOLUTION in Madrid, Barcelona, Seville, or Valencia at any local pharmacy with a valid prescription.

To obtain a prescription, you can use Oladoctor:

What are the alternatives to ZASTEN 0.2 mg/ml ORAL SOLUTION?

Other medicines with the same active substance (ketotifen) include ABISAX 20 mg TABLETS, ABRILIA 20 mg TABLETS, AERIUS 0.5 mg/ml 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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