Fenistil – Use | Dose | Effects

Fenistil is a medicine that contains active substance called dimetindene. Dosage form include:

  • gel (Fenistil gel),
  • cream (Fenistil cream),
  • drops (Fenistil drops).

It belongs to the group of antihistamines. It is used to relieve itching (pruritus) associated with a number of skin inflammatory processes (dermatitis), insect bites, burns and urticaria (itching due to an allergic reaction). It also has local anesthetic effect.


This medicine should be avoided in patients allergic to the active substance dimentiden. Also, it should be avoided in patients who have open wound and third-degree burns or fourth-degree burns. It should not be used near the eyes or on mucous membranes.

It should be avoided in children under the age of 2 unless your doctor recommended.

Do not use this medicine on large areas of the body due to possible systemic resorption and an increased risk of side effects.

Avoid icnreased exposure to sunlight while using this medicine, because your skin may be more sensitive to sunlight than usual (photosensitivity).

Use during pregnancy and breastfeeding

Fenistil may be used during pregnancy only if the benefit to the mother outweighs the risk to the child. Talk to your doctor about the benefits of using this medicine during pregnancy. Animal studies have shown that this drug have no harmful effects during pregnancy, but there are no human studies. It should not be used on large areas of the body.


Avoid breastfeeding if you are applying Fenistil gel or cream onto the breast.

How to use

Fenistil dosage form include gel, cream, drops, capsules, and syrups.

Dosage for gel and cream:

  • Apply a thin layer of Fenistil medicine on the affected area, 2 to 4 times a day. Do not apply gel or cream on large areas of the body!

Dosage for Fenistil drops:

Age Dose
Children aged 2 to 6 years 10 drops three times a day
Children aged 6 to 9 years 15 drops three times a day
Children ages 9 to 12 years 20 drops three times a day


Note: 20 drops contains 1 g of active substance (dimentiden)

Drops should be added to food just before eating when food is lukewarm. It can also be given with a spoon, without mixing with other liquids.

Dosage for Fenistil syrup:

Age Dose
Children under the age of 1 5-15 ml per day (1-3 teaspoons)
Children aged 1 to 3 years 15-20 ml per day (3-4 teaspoons)
Children above the age of 3 20-30 ml per day (2-3 tablespoons)
Children above the age of 12 and adults 30-60 ml per day (3-6 tablespoons)


Dosage for Fenistil capsules:

You should take it once a day, regardless of the food. It can be used only in adults.

Use with other medicines (Interactions)

There are no known interactions with other medicines.

Tell your doctor or pharmacist if you are using other topical medicines.

Side effects

Fenistil gel and cream may cause the following side effects:

  1. dry skin,
  2. burning sensation on the skin,
  3. photosensitivity (increased sensitivity to sunlight),
  4. allergy and others.

If you apply this gel or cream to large areas of the body, following side effects may occur:

  1. hallucinations,
  2. ataxia,
  3. redness of the face,
  4. urinating less than usual,
  5. fever and others.

Tell your doctor if you are experiencing any side effects.

Fenistil drops can cause following side effects:

  1. headache,
  2. dizziness,
  3. fatigue,
  4. nausea,
  5. vomiting,
  6. stomach upset,
  7. nervousness,
  8. muscle cramps,
  9. allergy and others.


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