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Pharmacological properties

Cinnarizine inhibits the contraction of vascular smooth muscle cells by blocking calcium channels. in addition to direct calcium antagonism, cinnarizine reduces the severity of the contractile action of vasoactive substances such as norepinephrine and serotonin, blocking receptor-mediated calcium channels. blockade of calcium intake into cells is selective with respect to tissues and leads to a decrease in vasoconstriction without affecting hell and heart rate.

Cinnarizine can further improve insufficient microcirculation, increasing the ability of red blood cells to deform and reducing blood viscosity. When it is taken, cellular resistance to hypoxia increases.

Cinnarizine inhibits the stimulation of the vestibular system, which leads to suppression of nystagmus, and other autonomic disorders. With the help of cinnarizine, the severity of acute attacks of dizziness can be prevented or reduced.

Pharmacokinetics

Absorption. The maximum levels of cinnarizine in blood plasma are achieved 1-3 hours after oral administration.

Distribution. Plasma protein binding is 91%.

Metabolism. Cinnarizine is metabolized by CYP 2D6.

T½ from blood plasma is from 4 to 24 hours. 1/3 metabolites are carried out with urine and ⅔ - with feces.

Indications

Cerebrovascular accident:

  • symptomatic treatment of cerebrovascular disorders, including dizziness, tinnitus (tinitus), headache of vascular origin, irritability, memory loss and inability to concentrate;
  • migraine prophylaxis.

Peripheral circulatory disorders:

  • symptomatic treatment of peripheral vascular disorders, including Raynauds disease, acrocyanosis, intermittent claudication, trophic disorders, trophic and varicose ulcers, paresthesias, nocturnal spasms in the extremities, cold extremities.

Imbalance:

  • symptomatic treatment of labyrinthine disorders, including dizziness, tinnitus, nystagmus, nausea, and vomiting.

Motion sickness:

  • prevention of motion sickness.

Application

Cerebrovascular accident

Adults and children over the age of 12 years: 1 tablet 3 times a day.

Peripheral circulatory disorders

Adults and children over the age of 12 years: 2-3 tablets 3 times a day. The maximum dose should not exceed 225 mg (9 tablets) per day. Since the effect of dizziness depends on the dose, the dose should be gradually increased.

Imbalance

Adults and children over the age of 12 years: 1 tablet 3 times a day.

Motion sickness

  • adults and children over the age of 12: 1 tablet half an hour before the trip; reception can be repeated every 6 hours;
  • Children 5–12 years of age: Half the dose prescribed to adults may be recommended.

Mode of application

For oral use. Preference should be given to taking Stugeron after a meal.

Contraindications

Hypersensitivity to the active substance or any of the auxiliary components of the drug.

Side effects

Drowsiness and gastrointestinal disturbances may occur. usually these symptoms are temporary and disappear with the gradual achievement of the optimal dose. symptoms such as headache, dry mouth, weight gain, sweating, or allergic reactions rarely occur. in very rare cases, Wilsons lichen and lupus-like symptoms have been reported.

In the medical literature, a special case of obstructive jaundice is mentioned. In elderly patients with prolonged treatment, cases of increased or the appearance of extrapyramidal symptoms were observed, sometimes in combination with depressive states. In such cases, the use of this tool should be discontinued.

Given the above adverse reactions, the following adverse reactions were observed with the use of the drug Stugeron in clinical trials and in the post-marketing period. Frequency is defined as: very often (≥1 / 10); often (≥1 / 100 to 1/10); infrequently (≥1 / 1000 to 1/100); rarely (≥1 / 10,000 to 1/1000); very rarely (1/10 000), the frequency is unknown (cannot be estimated from the available data).

From the nervous system
Often Drowsiness
Infrequently Hypersomnia, lethargy
Frequency unknown Dyskinesia, extrapyramidal disorders, parkinsonism, tremor
From the gastrointestinal tract
Often Nausea, dyspepsia
Infrequently Discomfort in the stomach, vomiting, pain in the upper abdomen
On the part of the liver and biliary tract
Frequency unknown Cholestatic jaundice
On the part of the skin and subcutaneous fat
Infrequently Hyperhidrosis, lichen-like keratosis, including lichen planus
Frequency unknown Subacute cutaneous lupus erythematosus
On the part of muscle and connective tissue
Frequency unknown Muscle stiffness
General disorders and violations at the injection site
Infrequently Fatigue
Laboratory indicators
Often Weight gain

In addition, cases of hypersensitivity reactions were reported.

Tags: Cinnarizine