How to use Fenistil
Contents of the leaflet
- Package Leaflet: Information for the Patient
- Warning! Keep the leaflet. Information on the immediate packaging in a foreign language
- Fenistil
- 1 mg/ml (0.1%), oral drops, solution
- What is Fenistil and what is it used for
- Important information before taking Fenistil
- When not to use Fenistil in the form of oral drops:
- Warnings and precautions
- You should consult your doctor before using this medicine in patients:
- Children and adolescents
- Fenistil and other medicines
- Using Fenistil with alcohol
- Pregnancy, breastfeeding, and fertility
- Driving and using machines
- Fenistil contains benzonic acid, propylene glycol, and sodium.
- How to take Fenistil
- Adults and children over 6 years of age:
- Age Maximum daily dose
- Infants from 1 month to 1 year of age and children under 6 years of age:
- The use of Fenistil in infants from 1 month to 1 year of age and in children under 6 years of age should be done on the advice of a doctor.
- Elderly patients
- Using a higher dose of Fenistil than recommended
- Missing a dose of Fenistil
- Possible side effects
- How to store Fenistil
- Contents of the pack and other information
Package Leaflet: Information for the Patient
Warning! Keep the leaflet. Information on the immediate packaging in a foreign language
Fenistil
1 mg/ml (0.1%), oral drops, solution
Dimetindene maleate
You should carefully read the contents of the leaflet before using the medicine, as it contains important information for the patient.
This medicine should always be used exactly as described in this patient leaflet or as directed by your doctor or pharmacist.
- You should keep this leaflet so that you can read it again if you need to.
- If you need advice or additional information, you should consult a pharmacist.
- If the patient experiences any side effects, including any side effects not listed in the leaflet, they should tell their doctor, pharmacist, or nurse. See section 4.
- If after 7 days there is no improvement or the patient feels worse, they should contact their doctor.
Table of Contents of the Leaflet:
- 1. What is Fenistil and what is it used for
- 2. Important information before taking Fenistil
- 3. How to take Fenistil
- 4. Possible side effects
- 5. How to store Fenistil
- 6. Contents of the pack and other information
1. What is Fenistil and what is it used for
Fenistil contains dimetindene maleate, which belongs to a group of antihistamine medicines. It inhibits the action of histamine - a substance responsible for allergic reactions. It relieves itching and irritation caused by skin rash, reduces swelling, and also relieves symptoms of allergic rhinitis, such as runny nose (cold), sneezing, nasal itching, and eye itching and tearing.
After oral administration, the effect of the medicine starts within 30-60 minutes and lasts for 8 to 12 hours.
Fenistil is used to treat symptoms of allergic diseases:
- skin: urticaria, itching in atopic dermatitis, allergic contact dermatitis, endogenous eczema,
- respiratory system: seasonal allergic rhinitis (hay fever) and chronic allergic rhinitis (e.g., house dust allergy, pet hair, feathers). The medicine is used to treat symptomatic food and drug allergies, as well as itching accompanying infectious diseases (e.g., chickenpox). It can be used to relieve symptoms that occur after insect bites and to prevent allergic reactions during desensitization treatment. If after 7 days there is no improvement or the patient feels worse, they should contact their doctor.
2. Important information before taking Fenistil
When not to use Fenistil in the form of oral drops:
- if the patient is allergic to dimetindene maleate or any of the other ingredients of this medicine (listed in section 6),
- in newborns up to the age of one month, especially premature babies.
Warnings and precautions
Before starting to use Fenistil, you should discuss it with your doctor or pharmacist, or nurse.
You should consult your doctor before using this medicine in patients:
- with glaucoma,
- with urinary retention caused by, for example, prostate enlargement,
- with epilepsy,
- in the elderly.
Elderly patients should consult their doctor before using this medicine, as they are more susceptible to the side effects of this medicine, such as excitement and fatigue.
The medicine should not be used in elderly patients with disorientation.
Children and adolescents
Antihistamines in young children can cause excitement.
The use of Fenistil in infants from 1 month to 1 year of age and in children under 6 years of age should be done on the advice of a doctor.
You should not use a higher dose than recommended.
The medicine should be kept out of sight and reach of children.
Fenistil and other medicines
You should tell your doctor about all medicines you are currently taking or have recently taken, including those that are available without a prescription.
Without consulting a doctor, you should not use Fenistil if you are taking any of the following medicines:
- antidepressants,
- anticholinergic medicines, such as bronchodilators (medicines used to treat asthma and bronchospasm), medicines used to treat spasms in the abdominal cavity (medicines used to prevent stomach and intestinal cramps), medicines that dilate the pupils, urological antispasmodic medicines (medicines used to treat symptoms of urinary incontinence and overactive bladder),
- sleeping pills, sedatives,
- antiepileptic medicines (medicines used to treat epilepsy),
- opioid painkillers,
- antihistamines (medicines used to treat common cold, cough, or other allergies),
- antiemetic medicines,
- procarbazine (a medicine used to treat certain types of cancer),
- scopolamine (a medicine used to prevent motion sickness),
- alcohol.
Using Fenistil with alcohol
Like other antihistamines, Fenistil may enhance the effects of alcohol.
Pregnancy, breastfeeding, and fertility
If you are pregnant or breastfeeding, think you may be pregnant, or are planning to have a baby, you should consult your doctor or pharmacist before using this medicine.
Fenistil should not be used during pregnancy, unless the benefits to the mother outweigh the potential risk to the fetus. The medicine should only be used under medical supervision.
Fenistil should not be used in breastfeeding women.
Driving and using machines
As with other antihistamines, Fenistil may impair mental and physical ability in some patients. Therefore, patients who are taking Fenistil in the form of oral drops should be cautious when driving vehicles or operating machinery.
Fenistil contains benzonic acid, propylene glycol, and sodium.
The medicine contains 2 mg of benzonic acid per dose (40 drops), which corresponds to 1 mg/ml.
Benzonic acid may increase the risk of jaundice (yellowing of the skin and whites of the eyes) in newborns (up to 4 weeks of age).
The medicine contains 200 mg of propylene glycol per dose (40 drops), which corresponds to 100 mg/ml.
Before administering the medicine to a child under 4 weeks of age, you should consult a doctor or pharmacist, especially if the child is taking other medicines that contain propylene glycol or alcohol.
The medicine contains less than 1 mmol (23 mg) of sodium per dose (40 drops), which means the medicine is considered "sodium-free".
3. How to take Fenistil
This medicine should always be taken exactly as described in this patient leaflet or as directed by your doctor, pharmacist, or nurse. If you have any doubts, you should consult your doctor, pharmacist, or nurse.
You should not exceed the recommended dose.
The use of Fenistil in infants from 1 month to 1 year of age and in children under 6 years of age should be done on the advice of a doctor. The medicine should not be used in children under 1 month of age.
Adults and children over 6 years of age:
The medicine should not be used for more than 7 days.
If after 7 days there is no improvement or the patient feels worse, they should contact their doctor.
Adults and children over 12 years of age:
The daily dose is 3-6 mg of dimetindene, given in 3 divided doses.
It is recommended to take 20-40 drops 3 times a day.
In patients with a tendency to drowsiness, 40 drops should be taken before bedtime and 20 drops in the morning, during breakfast.
Children under 12 years of age:
The recommended daily dose is 0.1 mg/kg body weight/day, given in 3 divided doses.
For example, 6 drops 3 times a day in the case of an 8-month-old infant weighing 9 kg.
8 drops 3 times a day in the case of a 2-year-old child weighing 12 kg.
You should not exceed the maximum daily dose, which is:
Age Maximum daily dose
1 month - 1 year
1.5 mg
30 drops
- 1-3 years 2.25 mg 45 drops
- 3-12 years 3 mg 60 drops
20 drops = 1 ml = 1 mg of dimetindene
Infants from 1 month to 1 year of age and children under 6 years of age:
The use of Fenistil in infants from 1 month to 1 year of age and in children under 6 years of age should be done on the advice of a doctor.
Fenistil should not be exposed to high temperatures. If the infant is bottle-fed, the medicine should be added to the bottle with warm food immediately before feeding. If the infant is spoon-fed, the drops can be given undiluted, on a small teaspoon.
Elderly patients
Elderly patients should consult their doctor before using this medicine.
Using a higher dose of Fenistil than recommended
In case of using a higher dose of Fenistil than recommended, you should immediately consult a doctor or pharmacist.
Symptoms of overdose are: drowsiness (mainly in adults), central nervous system stimulation (mainly in children and the elderly), including excitement, coordination disorders, hallucinations, tremors, convulsions, as well as urinary retention and fever. There may be a decrease in blood pressure, coma, and cardiovascular and respiratory collapse.
Missing a dose of Fenistil
In case of missing a dose, you should take it as soon as possible, unless there are less than 2 hours left before the next dose. In this case, you should take the medicine at the usual time. You should not take a double dose to make up for the missed dose.
If you have any further doubts about using this medicine, you should consult your doctor or pharmacist.
4. Possible side effects
Like all medicines, Fenistil can cause side effects, although not everybody gets them.
You should STOPusing the medicine and immediately consult your doctor if you experience any of the following symptoms, which may be signs of an allergic reaction:
- difficulty breathing or swallowing,
- swelling of the face, lips, tongue, or throat,
- severe itching of the skin with red rash or blisters, muscle cramps.
These symptoms occur very rarely(may occur less frequently than in 1 in 10,000 patients).
Other side effects that may occur are usually mild and temporary. The most common side effects occur especially at the beginning of treatment.
Very common(may occur in more than 1 in 10 patients using the medicine): fatigue.
Common(occur in less than 1 in 10 patients using the medicine): drowsiness, nervousness.
Rare(may occur in less than 1 in 1,000 patients using the medicine): excitement, headache, dizziness, gastrointestinal disorders, nausea, dry mouth, dry throat.
If any of the side effects get worse or if you experience any side effects not listed in this leaflet, you should inform your doctor or pharmacist.
Reporting side effects
If you experience any side effects, including any side effects not listed in this leaflet, you should tell your doctor, pharmacist, or nurse. Side effects can be reported directly to the Department of Drug Safety, Office for Registration of Medicinal Products, Medical Devices, and Biocidal Products
Al. Jerozolimskie 181C
02-222 Warsaw
tel.: +48 (22) 49 21 301
fax: +48 (22) 49 21 309
website: https://smz.ezdrowie.gov.pl
By reporting side effects, you can help provide more information on the safety of this medicine.
5. How to store Fenistil
Fenistil should be stored at a temperature below 25°C. Store in the original packaging, protect from light.
The medicine should be kept out of sight and reach of children.
Do not use this medicine after the expiry date stated on the carton and bottle. The expiry date refers to the last day of the month stated.
Medicines should not be disposed of via wastewater or household waste. You should ask your pharmacist how to dispose of medicines that are no longer needed. This will help protect the environment.
6. Contents of the pack and other information
What Fenistil contains
- The active substance of the medicine is dimetindene maleate. One milliliter of Fenistil contains 1 mg of dimetindene maleate.
- Other ingredients of the medicine are: propylene glycol, benzonic acid, disodium edetate, disodium phosphate dodecahydrate, citric acid monohydrate, sodium saccharin, purified water.
What Fenistil looks like and contents of the pack
Fenistil is a colorless, clear solution.
Available packaging: 20 ml bottle.
To obtain more detailed information, you should contact the marketing authorization holder or parallel importer.
Marketing authorization holder in Belgium, the country of export:
Haleon Belgium
Da Vincilaan 5
B-1930 Zaventem, Belgium
Manufacturer:
Haleon Belgium n.v/s.a
Site Apollo, Avenue Pascal, 2-4-6
B-1300 Wavre
Belgium
Parallel importer:
Delfarma Sp. z o.o., ul. Św. Teresy od Dzieciątka Jezus 111, 91-222 Łódź
Repackaged by:
Delfarma Sp. z.o.o., ul. Św. Teresy od Dzieciątka Jezus 111, 91-222 Łódź
Belgian marketing authorization number: BE051563
Parallel import authorization number: 264/09
Date of leaflet approval:13.11.2024
[Information about the trademark]

- Country of registration
- Dosage formDrops, 1 mg/ml
- ATC codeR06AB03
- Active substance
- Prescription requiredNo
- Marketing authorisation holder (MAH)Haleon Belgium
- This information is for reference only and does not constitute medical advice. Always consult a doctor before taking any medication. Oladoctor is not responsible for medical decisions based on this content.
- Alternatives to FenistilDosage form: Drops, 1 mg/mlActive substance: dimetindenePrescription not requiredDosage form: Drops, 1 mg/mlActive substance: dimetindenePrescription not requiredDosage form: Drops, 1 mg/mlActive substance: dimetindenePrescription not required
Online doctors for Fenistil
Discuss questions about Fenistil, including use, safety considerations and prescription review, subject to medical assessment and local regulations.
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Frequently Asked Questions
Fenistil does not require a prescription in Poland. You can check with a doctor online whether this medicine may be appropriate for your situation.
The active ingredient in Fenistil is dimetindene. This information helps identify medicines with the same composition but different brand names.
Fenistil is manufactured by Haleon Belgium. Pharmacy brands and packaging may differ depending on the distributor.
Doctors such as Family doctors, Psychiatrists, Dermatologists, Cardiologists, Endocrinologists, Gastroenterologists, Pulmonologists, Nephrologists, Rheumatologists, Hematologists, Infectious disease physicians, Allergists, Geriatricians, Paediatricians, Oncologists may assess whether Fenistil is appropriate, depending on your situation and local regulations. You can book an online consultation to discuss your symptoms and possible next steps.
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 Fenistil in Madrid, Barcelona, Seville, or Valencia at any local pharmacy with a valid prescription.
To obtain a prescription, you can use Oladoctor:
Other medicines with the same active substance (dimetindene) include Fenistil, Fenistil, Fenistil. 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.
















