PROSTAMED

INSTRUCTIONS for medical use of the medicinal product Pipzol 5, Pipzol 10, Pipzol 15, Pipzol 30 (Ripzol 5, Pipzol 10, Pipzol 15, Pipzol 30)

Composition

The active substance is aripiprazole; 1 tablet contains aripiprazole 5 mg or 10 mg, or 15 mg, or 30 mg; Excipients: lactose monohydrate, microcrystalline cellulose, hydroxypropylcellulose, corn starch, crospovidone, colloidal silicon dioxide, magnesium stearate, dyes: indigocarmine (E 132) (for 5 mg); yellow iron oxide (E 172) (for 15 mg); red iron oxide (E 172) (for 10 mg and 30 mg).

Pharmaceutical form

Tablets.

Main physical and chemical properties

· 5 mg tablets: rectangular tablets with rounded edges, blue in color with inclusions, with embossing "250" on one side and smooth on the other;
· 10 mg tablets: rectangular tablets with rounded edges, pink in color with inclusions, with embossing "252" on one side and smooth on the other;
· 15 mg tablets: round tablets of yellow color with inclusions, with beveled edges, with embossing "253" on one side and smooth on the other;
· 30 mg tablets: round tablets of pink color with inclusions, with beveled edges, with embossing "L 255" on one side and smooth on the other.

Pharmacotherapeutic group

Antipsychotic agents (neuroleptics). Aripiprazole.
ATC code N05A X12.

Pharmacological properties

Pharmacodynamics

The therapeutic effect of aripiprazole in schizophrenia is due to the combination of partial agonistic activity with respect to D2 dopamine and 5HT1a serotonin receptors and antagonistic activity with respect to 5HT2 serotonin receptors.
Aripiprazole has high affinity in vitro to D2 and D3 dopamine receptors, 5HT1a and 5HT2a serotonin receptors, and moderate affinity to D4 dopamine, 5HT2c and 5HT7 serotonin receptors, alpha 1-adrenergic receptors, and H1 histamine receptors. Aripiprazole is also characterized by moderate affinity to serotonin reuptake sites and lack of affinity for muscarinic receptors. In animal experiments, aripiprazole showed antagonism to dopaminergic hyperactivity and agonism to dopaminergic hypoactivity. The interaction with dopamine and serotonin receptors can explain some of the clinical effects of aripiprazole.

Clinical efficacy

Schizophrenia
It is known that aripiprazole is effective in maintaining clinical improvement during continued therapy in adult patients who showed an initial response to treatment.
Manic episodes in bipolar disorder I
Aripiprazole has demonstrated greater efficacy than placebo in reducing manic symptoms over 3 weeks.

Pharmacokinetics

Absorption

Aripiprazole is well absorbed, and peak plasma concentration occurs within 3-5 hours after administration. Aripiprazole undergoes minimal presystemic metabolism. The absolute bioavailability of the tablet form is 87%. Food with high fat content does not affect the pharmacokinetic properties of aripiprazole.

Distribution

Aripiprazole is widely distributed in body tissues. The volume of distribution is 4.9 l/kg, indicating extensive extravascular distribution. At therapeutic concentrations, more than 99% of aripiprazole and dehydroaripiprazole are bound to plasma proteins, mainly albumin.

Metabolism

Aripiprazole is actively metabolized in the liver, primarily through three pathways of biotransformation: dehydrogenation, hydroxylation, and N-dealkylation. Based on in vitro studies, the enzymes CYP3A4 and CYP2D6, which are responsible for the dehydrogenation and hydroxylation of aripiprazole, and N-dealkylation, are catalyzed by the enzyme CYP3A4. Aripiprazole is the dominant substance in the large circle of blood circulation. In the steady state, dehydroaripiprazole, an active metabolite, accounts for about 40% of the AUC of aripiprazole in plasma.

Elimination

The mean elimination half-life of aripiprazole is approximately 75 hours in individuals with active CYP2D6 metabolism and approximately 146 hours in individuals with poor CYP2D6 metabolism.
The total clearance of aripiprazole is 0.7 ml/min/kg, and it occurs mainly in the liver. After a single oral dose of aripiprazole, approximately 27% is excreted in the urine and approximately 60% in the feces. Less than 1% of unchanged aripiprazole is excreted in the urine, and approximately 18% of the dose is excreted in the feces in unchanged form.

Clinical characteristics

Indications

Treatment of schizophrenia in adults.
Treatment of moderate and severe manic episodes in bipolar disorder I, as well as for the prevention of new manic episodes in adults who have previously experienced manic episodes and responded to aripiprazole treatment.

Contraindications

Hypersensitivity to aripiprazole or any other component of the drug.

Interaction with other medicinal products and other forms of interaction

Due to antagonism to α1-adrenergic receptors, aripiprazole may enhance the effect of certain antihypertensive drugs.
Since aripiprazole affects the central nervous system (CNS), caution should be exercised when taking alcohol or drugs that affect the CNS, due to possible cross-reactions, such as sedative effects (see section "Adverse reactions").

Potential impact of other medicinal products on the effect of aripiprazole

The inhibitor of gastric acid secretion, the H2 histamine receptor antagonist famotidine, reduces the rate of aripiprazole absorption, but this effect is not considered clinically significant.
Aripiprazole is metabolized by several pathways involving the enzymes CYP2D6 and CYP3A4, but not CYP1A. Therefore, smokers do not need to adjust the dose.

Special warnings and precautions for use

When treating with neuroleptics

Improvement in the patient's clinical condition may take from several days to several weeks. During this period, careful monitoring of the patient's condition is necessary.

Suicidal tendencies

The emergence of suicidal behavior is inherent in patients with psychotic disorders and mood disorders, and in some cases, it has been observed soon after the start of neuroleptic treatment or switching from one neuroleptic to another, including treatment with aripiprazole (see section "Adverse reactions"). Neuroleptic treatment should be accompanied by careful monitoring of patients who belong to the group of increased risk.

Cardiovascular disorders

Aripiprazole should be used with caution in patients with a history of cardiovascular diseases (myocardial infarction or ischemic heart disease, heart failure, or conduction disorders), cerebrovascular disorders, conditions that predispose patients to hypotension (dehydration, hypovolemia, or the use of antihypertensive drugs) or hypertension, including progressive or malignant hypertension.

Posology and method of administration

Adults

Schizophrenia: the recommended initial dose is 10 or 15 mg/day, with a maintenance dose of 15 mg/day. This dose should be taken once a day, regardless of food intake. The drug is effective in the dose range of 10 to 30 mg/day. Increasing the efficacy at daily doses above 15 mg has not been demonstrated, although some patients may benefit from a higher dose.
The maximum daily dose should not exceed 30 mg.

Special patient groups

Liver dysfunction
Patients with mild or moderate liver dysfunction do not require dose adjustment. For patients with severe liver dysfunction, there is insufficient data to provide recommendations. For such patients, dosing should be done with caution. The maximum daily dose of 30 mg for patients with severe liver dysfunction should be used with caution (see section "Pharmacological properties").

Overdose

Symptoms.
In adult patients, cases of intentional or accidental acute overdose of aripiprazole have been reported, with doses up to 1260 mg, without a fatal outcome. Potentially significant medical symptoms observed included lethargy, increased blood pressure, somnolence, tachycardia, nausea, vomiting, and diarrhea.

Adverse reactions

Brief overview of the safety profile.
The most common adverse reactions were akathisia and nausea. Each of these symptoms occurred in more than 3% of patients taking aripiprazole orally.

Shelf life

3 years.

Storage conditions

Store in the original packaging in a place inaccessible to children at a temperature not exceeding 25 °C.

Packaging

10 tablets in one blister pack. One blister pack in a cardboard box.

Release category

By prescription.

Manufacturer

Alembic Pharmaceuticals Limited.

Manufacturer's location and address

Panelav, PO Tajpura, Taluka Halol, Panchmahal, Gujarat, IN - 389350, India.