FENISTIL

Poland

It is used to treat symptoms of allergic diseases, such as urticaria (hives), skin itching, hay fever, sneezing, eye itching and tearing, as well as to relieve symptoms following insect bites.

Brand name FENISTIL
Dosage form drops, oral solution
Active substance / Dosage
Prescription type Over-the-counter
ATC code
Registration number 100531584
FENISTIL drops, oral solution

Frequently asked questions

How to use Fenistil?

Adults and children over 12 years of age should take 20–40 drops 3 times a day. In children under 12 years of age, the dose depends on body weight and is 2 drops per kilogram of body weight per day, divided into 3 doses. Infants (from 1 month of age) and children under 6 years of age should take the medicine only under medical supervision.

When should you not use this medicine?

It should not be used if you are allergic to any of the ingredients of the medicine or in newborns up to one month of age. Particular caution should be exercised in individuals with glaucoma, epilepsy, urinary retention issues, and in elderly persons.

Can Fenistil be combined with other medicines or alcohol?

The medicine may enhance the effects of alcohol. Without consulting a doctor, it should not be combined with antidepressants, anticonvulsants, hypnotics (sleeping pills), sedatives, opioid analgesics, antiemetics, or certain anticholinergic medicines.

What side effects may Fenistil cause?

The most common side effects may include fatigue, as well as drowsiness or nervousness. Less commonly, headaches and dizziness, nausea, dry mouth or throat, and agitation may occur. Discontinue use immediately and contact a doctor if facial swelling, difficulty breathing, or severe itching with a rash occurs.

Does the medicine affect driving?

Yes, the medicine may impair psychophysical performance; therefore, persons taking it should exercise caution when driving vehicles or operating machinery that requires concentration.

Instructions for use

Package leaflet: Information for the patient

Warning! Keep the leaflet. Information on the immediate packaging in a foreign language.
Fenistil
1 mg/ml, oral drops, solution
Dimetindene maleate
Please read the entire leaflet carefully 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 a doctor or pharmacist.

  • Keep this leaflet for future reference.
  • If advice or additional information is needed, consult a pharmacist.
  • If the patient experiences any adverse reactions, including any not listed in this leaflet, inform a doctor, pharmacist, or nurse. See section 4.
  • If there is no improvement after 7 days, or if the patient feels worse, consult a doctor.

Table of contents:

  1. What Fenistil is and what it is 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 Fenistil is and what it is used for

Fenistil contains dimetindene maleate, which belongs to a group of medicines called antihistamines.
It blocks the action of histamine, a substance responsible for allergic reactions. It relieves itching and irritation caused by skin rashes, reduces swelling, and also alleviates symptoms of allergic rhinitis, such as watery nasal discharge (runny nose), sneezing, nasal itching, and eye itching and tearing.
After oral administration, the effect of the medicine begins within 30–60 minutes and lasts for 8 to 12 hours.
Fenistil is used to treat symptoms of allergic conditions:

  • of the skin: urticaria, itching associated with atopic dermatitis, allergic contact dermatitis, endogenous eczema;
  • of the respiratory system: seasonal allergic rhinitis (hay fever) and chronic allergic rhinitis (e.g., allergy to house dust, animal fur, feathers). Fenistil is used for symptomatic treatment of food and drug allergies, and also relieves itching associated with infectious diseases (e.g., chickenpox). It may be used to relieve symptoms following insect bites and to prevent allergic reactions during desensitization therapy. If there is no improvement after 7 days, or if the patient feels worse, consult a doctor.

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2. Important information before using Fenistil

When not to use Fenistil oral drops:

  • if the patient is allergic to dimethindene maleate or any of the other ingredients of this medicine (listed in section 6),
  • in newborns during the first month of life, especially premature infants.

Warnings and precautions
Before starting to use Fenistil, discuss this with your doctor, pharmacist, or nurse.
Consult a doctor before using this medicine in patients:

  • with glaucoma,
  • with urinary retention caused, for example, by benign prostatic hyperplasia,
  • with epilepsy,
  • in elderly patients.

Elderly patients should consult a doctor before using this medicine, as they are more susceptible to adverse effects of this medicine, such as excitation and fatigue. This medicine should not be used in elderly patients with disorientation.

Children and adolescents
Antihistamines may cause excitation in young children.
The use of Fenistil in infants aged from 1 month to 1 year of age and in children under 6 years of age should be under medical advice.
Do not exceed the recommended dose.
Keep the medicine out of sight and reach of children.

Fenistil and other medicines
Tell your doctor about all medicines currently or recently taken by the patient, including those obtained without a prescription.
Do not use Fenistil without medical advice if the patient is taking any of the following medicines:

  • antidepressants,
  • anticholinergic medicines, such as: bronchodilators (medicines used in the treatment of asthma and bronchial spasms), medicines used for spastic conditions in the abdominal cavity (medicines used to prevent stomach and intestinal spasms), mydriatics (pupil-dilating agents), urological antispasmodics (medicines used in the treatment of urinary incontinence and overactive bladder symptoms),
  • sedatives, tranquilizers,
  • anticonvulsants (medicines used in the treatment of epilepsy),
  • opioid analgesics,
  • antihistamines (medicines used in the treatment of common cold, cough, or other allergies),
  • antiemetics,
  • procarbazine (a medicine used in the treatment of certain types of cancer),
  • scopolamine (a medicine used to prevent motion sickness),
  • alcohol.

Use of Fenistil with alcohol
Like other antihistamines, Fenistil may enhance the effects of alcohol.
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Pregnancy, breastfeeding, and fertility
If the patient is pregnant or breastfeeding, suspects she may be pregnant, or is planning to have a child, she should consult a doctor or pharmacist before using this medicine.
Fenistil should not be used during pregnancy unless the benefits to the mother outweigh the potential risks to the fetus. The medicine may be used only under medical supervision.
Fenistil should not be used in breastfeeding women.

Driving and operating machinery
As with other antihistamines, Fenistil may impair psycho-physical performance in some patients. Therefore, individuals taking Fenistil oral drops should exercise caution when driving motor vehicles or performing other activities requiring concentration (e.g., operating machinery).

Fenistil contains benzoic acid (E 210), propylene glycol (E 1520), and sodium.
The medicine contains 2 mg of benzoic acid per dose (40 drops), equivalent to 1 mg/mL.
Benzoic 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), equivalent to 100 mg/mL.
Before administering the medicine to a child under 4 weeks of age, consult a doctor or pharmacist, especially if the child is taking other medicines containing propylene glycol or alcohol.
The medicine contains less than 1 mmol (23 mg) of sodium per dose (40 drops), meaning the medicine is considered "sodium-free".

3. How to use Fenistil

This medicine should always be taken exactly as described in this patient information leaflet or as directed by your doctor, pharmacist, or nurse. If in doubt, consult your doctor, pharmacist, or nurse.
Do not exceed the recommended dose.
Use of this medicine in infants aged 1 month to 1 year and in children under 6 years of age should be under medical supervision. This medicine must not be used in children under 1 month of age.

Adults and children over 6 years of age:
Do not use the medicine for longer than 7 days.
If there is no improvement after 7 days, or if symptoms worsen, consult a doctor.

Adults and children over 12 years of age
The daily dose is 3–6 mg dimethindene, divided into 3 equal doses.
It is recommended to take 20 to 40 drops three times daily.
In patients prone to drowsiness, it is recommended to take 40 drops at bedtime and 20 drops in the morning with breakfast.

Children under 12 years of age
The recommended daily dose is 0.1 mg/kg body weight/day, i.e. 2 drops per kg of body weight per day, divided into 3 doses, for example:
6 drops three times daily for an 8-month-old infant weighing 9 kg
8 drops three times daily for a 2-year-old child weighing 12 kg.

Do 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 dimethindene maleate

Infants aged 1 month to 1 year and children under 6 years of age:
Use of Fenistil in infants aged 1 month to 1 year and in children under 6 years of age should be under medical supervision.

Fenistil should not be exposed to high temperatures. If the infant is bottle-fed, add the medicine to the bottle containing warm food immediately before feeding. If the infant is fed with a spoon, the drops may be administered undiluted on a small teaspoon.

Elderly patients
Elderly patients should consult their doctor before using this medicine.

Use of more than the recommended dose of Fenistil
If more than the recommended dose of Fenistil is taken, seek immediate advice from a doctor or pharmacist.
Symptoms of overdose include: drowsiness (mainly in adults), central nervous system stimulation (mainly in children and elderly patients), including agitation, impaired motor coordination, hallucinations, tremors, seizures, urinary retention, and fever. A drop in blood pressure, coma, and circulatory-respiratory collapse may also occur.

Missed dose of Fenistil
If a dose is missed, take it as soon as possible, provided that less than 2 hours remain until the next scheduled dose. Otherwise, take the next dose at the usual time. Do not take a double dose to make up for a missed dose.

If you have any further questions about the use of this medicine, consult your doctor or pharmacist.

4. Possible adverse effects

Like all medicines, Fenistil may cause adverse effects, although not everyone experiences them.
You should STOP using the medicine and contact your doctor immediately if any of the following symptoms occur, 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 enlarging blisters, muscle cramps.

These symptoms are very rare ( may occur in fewer than 1 in 10,000 people ).
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Other adverse effects that may occur are usually mild and transient. The most common effects occur particularly at the beginning of treatment.
Very common ( may affect more than 1 in 10 people taking this medicine ): fatigue.
Common ( affect fewer than 1 in 10 people taking this medicine ): drowsiness, nervousness.
Rare ( may affect fewer than 1 in 1,000 people taking this medicine ): restlessness, headache,
dizziness, gastrointestinal discomfort, nausea, dry mouth, sore throat.
If any of the adverse effects worsen or if any adverse effects not listed in this leaflet occur, inform your doctor or pharmacist.
Reporting of adverse effects
If any adverse effects occur, including any adverse effects not listed in this leaflet, inform your doctor, pharmacist or nurse. Adverse effects can be reported directly to the Department of Monitoring Adverse Drug Reactions of the 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 adverse effects, more information on the safety of this medicine can be collected.

5. How to store Fenistil

Store below 25°C. Keep in the original packaging to protect from light.
Keep the medicine out of sight and reach of children.
Do not use the medicine after the expiry date stated on the packaging. The expiry date refers to the last day of the stated month.
Medicines should not be disposed of via wastewater or household waste. Ask your pharmacist how to dispose of medicines no longer in use. This will help protect the environment.

6. Contents of the package and other information

What Fenistil contains

  • The active substance is dimetindene maleate. One millilitre of Fenistil contains 1 mg of dimetindene maleate.
  • Other ingredients are: propylene glycol (E 1520), benzoic acid (E 210), disodium edetate (E 386), disodium phosphate dodecahydrate (E 339), citric acid monohydrate (E 330), sodium saccharin (E 954), purified water.

What Fenistil looks like and contents of the pack
Fenistil is a solution, clear, colourless to slightly yellowish-brown, contained in an amber glass bottle with a polyethylene dropper and a polypropylene cap or a child-resistant polypropylene cap, placed in a cardboard box.
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Pack sizes available: 1 bottle of 20 ml.
For further detailed information, please contact the marketing authorisation holder or the parallel importer.
Marketing authorisation holder in Croatia, the country of export:
Haleon Hungary Kft., Csörsz u. 43, 1124 Budapest, Hungary
Manufacturer:
Haleon Germany GmbH, Barthstraße 4, 80339 Munich, Germany
Parallel importer:
Delfarma Sp. z o.o.
ul. Św. Teresy od Dzieciątka Jezus 111
91-222 Łódź
Repackaged in:
Delfarma Sp. z o.o.
ul. Św. Teresy od Dzieciątka Jezus 111
91-222 Łódź
Marketing authorisation number in Croatia, the country of export: HR-H-870677704-01
Parallel import licence number: 22/26
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Similar drugs

Brand name Dosage form Active substance / Dosage Manufacturer
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FENISTIL drops, oral solution Haleon Hungary Kft.
FENISTIL drops, oral solution Haleon Hungary Kft.
FENISTIL drops, oral solution Haleon Hungary Kft.
FENISTIL drops, oral solution Haleon Belgium
FENISTIL drops, oral solution Haleon Hungary Kft.
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The original data is available in the language of the country of manufacture.

Data source: Register of Medicinal Products of Poland (URPL)

Data last verified: September 01, 2026