Ketotifen, tablets 1 mg 30 pcs

Ketotifen has a pronounced antihistamine, weakly antiserotonin action, without anticholinergic effect. In higher doses it has a slightly depressing effect on the central nervous system.

Pharmacodynamics

The mechanism of action of Ketotifen is related to the ability to inhibit the release of histamine and other inflammatory mediators from mast cells due to membrane stabilization and also due to blockade of histamine H1 receptors. Ketotifen inhibits enzyme phosphodiesterase, as a result of which the level of cyclic adenosine monophosphate in mast cells increases.

The drug reduces or suppresses skin and bronchial reactions caused by the antigen, which leads to its use for preventive purposes. When used as monotherapy it does not stop asthma attacks, but leads to reduction of the number, duration and intensity of these attacks, and in some cases they completely disappear. It reduces eosinophilia, reduces the need and frequency of use of anti-asthmatic drugs: corticosteroids, bronchodilators, etc.

Pharmacokinetics

The drug is characterized by good and rapid resorption, without the danger of cumulation in the body. Bioavailability is approximately 50%, which is due to metabolism during “first passage” through the liver.

The time of reaching maximum concentration in plasma is 2-4 hours, and binding to plasma proteins is 75%. Excretion from the body occurs in two phases, and within 48 hours most part of the taken single dose is excreted with urine. Therapeutic effect occurs after 2 weeks of using the drug.

Indications

atopic bronchial asthma, allergic rhinitis,
allergic conjunctivitis, hay fever (hay fever)
Ketotifen Sopharma effectively prevents attacks of bronchial asthma and other manifestations of immediate allergic reactions

Pharmacological effect

Ketotifen has a pronounced antihistamine, weakly antiserotonin effect, without an anticholinergic effect. In higher doses it has a slightly depressant effect on the central nervous system.

Pharmacodynamics

The mechanism of action of Ketotifen is associated with the ability to inhibit the release of histamine and other inflammatory mediators from mast cells due to the stabilization of membranes, as well as due to the blockade of histamine H1 receptors. Ketotifen inhibits the enzyme phosphodiesterase, resulting in increased levels of cyclic adenosine monophosphate in mast cells.

The drug reduces or suppresses reactions of the skin and bronchi caused by the antigen, which determines its use for prophylactic purposes. When used as monotherapy, it does not relieve asthma attacks, but leads to a decrease in the number, duration and intensity of these attacks, and in some cases they completely disappear. Reduces eosinophilia, reduces the need and frequency of use of antiasthmatic drugs: corticosteroids, bronchodilators, etc.

Pharmacokinetics

The drug is characterized by good and rapid resorption, without the danger of accumulation in the body. Bioavailability is approximately 50%, which is due to “first pass” metabolism through the liver.

The time to reach maximum plasma concentration is 2-4 hours, and plasma protein binding is 75%. Excretion from the body occurs in two phases, and within 48 hours the main part of the taken single dose is excreted in the urine. The therapeutic effect develops after 2 weeks of the course of taking the drug.

Special instructions

Patients taking ketotifen should refrain from potentially hazardous activities that involve increased alertness (for example, driving a car).

The drug can be used during lactation only if necessary, since it passes into breast milk.

Active ingredient

Ketotifen

Composition

1 tablet contains:

active ingredient:

ketotifen hydrofumarate 1.38 mg

(corresponds to 1 mg ketotifen)

excipients:

MCC;

calcium hydrogen phosphate;

wheat starch;

magnesium stearate

Contraindications

There are no absolute contraindications.

The drug should not be taken during pregnancy, while taking oral antidiabetic drugs, as this may lead to thrombocytopenia; with sedatives and alcohol.

Hypersensitivity to the components of the drug.

Side Effects

In the first days, you may experience drowsiness, dry mouth, mild dizziness, fatigue, and slowed mental reactions, which usually disappear after a few days. It is recommended to use a lower dose (5 ml per day) during the first week. Less common is an increase in appetite and associated weight gain.

Patients taking ketotifen should refrain from potentially hazardous activities that involve increased alertness (for example, driving a car).

The drug can be used during lactation only if necessary, since it passes into breast milk.

Interaction

The use of ketotifen in patients who have systematically taken corticosteroids requires a gradual reduction in previous corticosteroid therapy, as there is a risk of developing adrenal insufficiency.

Combination with oral antidiabetic agents sometimes leads to the development of thrombocytopenia.

The simultaneous use of Ketotifen and sedatives, hypnotics, antihistamines and alcohol can lead to an increase in their effect.

Overdose

When the dose is increased, mild tremors of the limbs, anxiety and tachycardia may be observed, which disappear after the dose is reduced.

Storage conditions

In a place protected from light, at a temperature not exceeding 25 °C

Shelf life

4 years

Manufacturer

Sopharma JSC, Bulgaria