Seroquel Prolong, 200 mg 60 pcs

How to take, the dosage

Over the mouth, swallowed whole (without splitting, chewing or breaking), once daily, separate from food.

Adults

The treatment of schizophrenia, moderate and severe manic episodes in the structure of bipolar disorder

The drug Seroquel Prolong should be taken at least 1 hour before a meal.

The daily dose for the first 2 days of therapy is: 1st day – 300 mg, 2nd day – 600 mg. Recommended daily dose is 600 mg, but if necessary it can be increased to 800 mg/day. Depending on clinical effect and individual tolerance of a patient, the dose may vary from 400 to 800 mg/day. For maintenance therapy in schizophrenia, no dose adjustment is required after an exacerbation has subsided.

The treatment of episodes of depression in the structure of bipolar disorder

Seroquel Prolong should be taken before bedtime. The daily dose for the first 4 days of therapy is: 1st day – 50 mg, 2nd day – 100 mg, 3rd day – 200 mg, 4th day – 300 mg. Recommended daily dose is 300 mg. Depending on the clinical effect and individual tolerance of a patient, the dose can be increased up to 600 mg. The advantage of using Seroquel Prolong at a daily dose of 600 mg compared to 300 mg has not been identified. Seroquel Prolong at a dose greater than 300 mg should be prescribed by a physician experienced in the therapy of bipolar disorders.

Prevention of recurrence of bipolar disorder in patients with prior effective quetiapine therapy for manic or depressive episodes in the structure of bipolar disorder

. To prevent recurrence of manic, depressive, and mixed episodes in bipolar disorder, patients with a positive response to treatment with Seroquel Prolong should continue therapy at the same daily dose as at the start of therapy. Seroquel Prolong should be taken before bedtime. Depending on the clinical effect and individual tolerance of the patient, the dose may vary from 300 to 800 mg/day. For maintenance therapy, it is recommended to use the minimum effective dose of Seroquel Prolong.

Transfer from Seroquel to Seroquel Prolong

For ease of administration, patients currently receiving fractional therapy with Seroquel may be switched to Seroquel Prolong once daily at a dose equivalent to the total daily dose of Seroquel. Dose adjustments may be necessary in individual cases.

Elderly patients

As with other neuroleptic drugs, Seroquel Prolong should be used with caution in elderly patients, especially at the beginning of therapy. Adjustment of the effective dose of Seroquel Prolong may be slower in the elderly and the daily therapeutic dose is lower than in younger patients. The average plasma Cl of quetiapine is 30-50% lower in elderly patients compared to younger patients. In elderly patients, the starting dose of Seroquel Prolong is 50 mg/day. The dose may be increased by 50 mg daily until an effective dose is achieved, depending on the clinical response and tolerability of the drug in the individual patient.

Patients with renal impairment

Dose adjustment is not required for patients with renal impairment.

Patients with hepatic insufficiency

Quetiapine is extensively metabolized in the liver. Consequently, caution should be exercised when using Seroquel Prolong in patients with hepatic impairment, especially at the beginning of therapy. It is recommended to start therapy with Seroquel Prolong at a dose of 50 mg/day and increase the dose daily by 50 mg until an effective dose is achieved.

Interaction

Caution should be exercised when combining Seroquel Prolong with other CNS-acting drugs and with alcohol.

The cytochrome P450 (CYP) 3A4 isoenzyme is the main isoenzyme responsible for the metabolism of quetiapine through the cytochrome P450 system. In studies in healthy volunteers, co-administration of quetiapine (in dose 25 mg) with ketoconazole, a CYP3A4 inhibitor, resulted in 5-8 times higher AUC of quetiapine.

Hence, co-administration of vetiapine and CYP3A4 cytochrome inhibitors is contraindicated. It is not recommended to consume grapefruit juice during therapy with quetiapine.

In a pharmacokinetic study, the use of quetiapine in different doses before or simultaneously with carbamazepine administration resulted in a significant increase in Cl of quetiapine and a corresponding decrease in AUC, an average of 13%, compared with quetiapine administration without carbamazepine. In some patients, the decrease in AUC was even more pronounced. This interaction was accompanied by a decrease in plasma concentration of quetiapine and may have reduced the effectiveness of therapy with Seroquel^® Prolong. Co-administration of quetiapine with phenytoin, another inducer of microsomal liver system, was accompanied by an even more pronounced (by about 450%) increase in clearance of quetiapine. The use of Seroquel^® Prolong in patients receiving liver enzyme system inducers is possible only if the expected benefit of therapy with Seroquel^® Prolong exceeds the risk associated with withdrawal of the liver enzyme inducer drug. Changing the dose of microsomal enzyme inducers should be gradual. If necessary, they may be replaced by drugs that do not induce microsomal enzymes (for example, valproic acid preparations).

The pharmacokinetics of quetiapine were not significantly changed by concomitant use of the antidepressant imipramine (CYP2D6 inhibitor) or fluoxetine (CYP3A4 and CYP2D6 inhibitor).

The pharmacokinetics of quetiapine is not significantly changed by concomitant use with antipsychotic drugs – risperidone or haloperidol. However, concomitant administration of quetiapine and thioridazine resulted in an increase in the Cl of quetiapine by approximately 70%.

The pharmacokinetics of quetiapine are not significantly altered by concomitant use of cimetidine.

Lorazepam clearance is decreased by approximately 20% when 2 mg of lorazepam is taken once with Clavetiapine at a dose of 250 mg twice daily.

The pharmacokinetics of lithium preparations are not altered by concomitant use of quetiapine. No clinically significant changes in the pharmacokinetics of valproic acid and quetiapine have been observed when valproate seminatrium and quetiapine are used together.

Pharmacokinetic studies to study the interaction of Seroquel Prolong with drugs used in cardiovascular disease have not been conducted.

Cautions must be taken when combining Ceroquel Prolong with drugs that may cause electrolyte imbalance and QT_c prolongation.

Quetiapine did not cause induction of hepatic enzyme systems involved in phenazone metabolism.

False positive screening tests for methadone and tricyclic antidepressants by enzyme immunoassay have been reported in patients taking quetiapine. Chromatographic testing is recommended to confirm screening results.

Special Instructions

Sleepiness

Drowsiness and associated symptoms such as sedation may occur during therapy with Seroquel Prolong. In clinical studies involving depressed patients with bipolar disorder, somnolence generally developed within the first three days of therapy. The severity of this side effect was mostly mild to moderate. If severe somnolence develops, patients with depression in the structure of bipolar disorder may require more frequent visits to the physician within 2 weeks from the onset of somnolence or until the severity of symptoms decreases. In some cases, it may be necessary to discontinue therapy with Seroquel Prolong.

Patients with cardiovascular disease

Patients with cardiovascular and cerebrovascular disease and other conditions predisposing to hypotension should be cautious when using Seroquel Prolong. Orthostatic hypotension may occur during treatment with Seroquel Prolong, especially during dose titration at the beginning of therapy. If orthostatic hypotension occurs, dose reduction or slower titration may be required.

Dysphagia and aspiration have been observed during therapy with Seroquel Prolong. A causal relationship of aspiration pneumonia with administration of Seroquel Prolong has not been established. However, caution should be exercised when administering the drug to patients at risk of aspiration pneumonia.

Convulsive seizures

There is no difference in the incidence of seizures in patients taking quetiapine or placebo. However, as with therapy with other antipsychotics, caution is advised when treating patients with a history of seizures.

Extrapyramidal symptoms

An increased incidence of EPS in depressed adult patients with bipolar disorder when taking quetiapine for depressive episodes compared to placebo has been noted. However, quetiapine therapy of patients with schizophrenia and mania in the structure of bipolar disorder showed no increase in the incidence of EPS compared with placebo.

Late dyskinesia

If symptoms of tardive dyskinesia develop, it is recommended that the drug dose be reduced or gradually withdrawn. Symptoms of tardive dyskinesia may worsen or even occur after discontinuation of the drug.

Malignant neuroleptic syndrome

Malignant neuroleptic syndrome may develop while taking antipsychotic drugs, including quetiapine. Clinical manifestations of the syndrome include hyperthermia, altered mental status, muscle rigidity, autonomic nervous system lability, and increased creatine phosphokinase activity. In such cases, Seroquel Prolong should be discontinued and appropriate treatment should be given.

Severe neutropenia

In clinical trials of quetiapine, cases of severe neutropenia (neutrophil count <0.5-10⁹/l) have been infrequently reported. Most cases of severe neutropenia occurred several months after the start of quetiapine therapy. No dose-dependent effect was detected. Leukopenia and/or neutropenia resolved after discontinuation of quetiapine therapy. A possible risk factor for the occurrence of neutropenia is a previous low white blood cell count and a history of drug-induced neutropenia. In patients with neutrophil counts <1-10⁹/l, quetiapine should be discontinued. The patient should be monitored for possible symptoms of infection and neutrophil counts should be monitored (until the level exceeds 1.5-10⁹/l).

Interaction with other medicinal products

The use of Seroquel Prolong in combination with potent liver enzyme system inducers such as carbamazepine and phenytoin decreases the plasma concentration of quetiapine and may decrease the effectiveness of therapy with Seroquel Prolong.

The administration of Seroquel Prolong to patients receiving liver enzyme system inducers is possible only if the expected benefit of therapy with Seroquel Prolong exceeds the risk associated with withdrawal of the liver enzyme inducer drug. Changes in the dose of microsomal enzyme inducers should be gradual. If necessary, they may be replaced by drugs that do not induce microsomal enzymes (for example, valproic acid preparations).

Hyperglycemia

The development of hyperglycemia or exacerbation of diabetes mellitus is possible against the background of quetiapine administration, in patients with a history of diabetes mellitus. Clinical monitoring of patients with diabetes mellitus and patients with risk factors for diabetes mellitus is recommended.

Lipid concentrations

Quetiapine administration may increase triglyceride and cholesterol concentrations and decrease HDL concentrations.

Long QT interval

There is no identified relationship between quetiapine administration and persistent increase in absolute QT interval value. However, prolongation of QT interval has been observed in overdose. Caution should be exercised when prescribing quetiapine, as well as other antipsychotic drugs, to patients with cardiovascular disease and previously observed prolongation of the QT interval. Caution should also be exercised when prescribing quetiapine concomitantly with QT interval prolongers_c, other neuroleptics, especially in the elderly, patients with congenital QT interval prolongation syndrome, chronic heart failure, myocardial hypertrophy, hypokalemia or hypomagnesemia.

Acute reactions associated with withdrawal of the drug

The following acute reactions (withdrawal syndrome) may be observed during abrupt withdrawal of quetiapine – nausea, vomiting, insomnia, headache, dizziness and irritability. Therefore, it is recommended that the drug be withdrawn gradually, over a period of at least one or two weeks.

Elderly patients with dementia

Seroquel Prolong is not indicated for the treatment of psychosis associated with dementia.

Some atypical neuroleptics in randomized placebo-controlled trials increased the risk of cerebrovascular complications about 3-fold in patients with dementia. The mechanism of this increased risk is not understood. A similar risk of increased incidence of cerebrovascular complications cannot be excluded for other antipsychotic drugs or other patient groups. Seroquel Prolong should be used with caution in patients at risk of stroke.

A review of the use of atypical neuroleptics for the treatment of psychosis associated with dementia in elderly patients found increased mortality in the group of patients treated with this group of drugs compared with the placebo group. Two 10-week placebo-controlled trials of quetiapine in a similar group of patients (n=710; mean age: 83 years; age range: 56-99 years) showed that mortality was 5.5% in the patient group receiving quetiapine and 3.2% in the placebo group. The causes of lethal outcomes observed in these patients were consistent with those expected in this population. No causal relationship was found between quetiapine treatment and the risk of increased mortality in older patients with dementia.

Suicidal ideation/suicidal thoughts or clinical deterioration

Depression is associated with an increased risk of suicidal ideation, self-harm and suicide (suicide-related events). This risk persists until the onset of significant remission. Due to the fact that it may take several weeks or more before a patient’s condition improves from the start of treatment, patients should be under close medical supervision until improvement occurs. Conventional clinical experience suggests that the risk of suicide may increase in the early stages of remission.

Other psychiatric disorders for which quetiapine is prescribed are also associated with an increased risk of suicidal events. In addition, such conditions may be comorbid with a depressive episode. Thus, the precautions used in the therapy of patients with a depressive episode should also be taken when treating patients with other psychiatric disorders.

Patients with a history of suicidal events, as well as patients clearly expressing suicidal thoughts before initiating therapy, are at increased risk of suicidal intent and suicide attempts and should be carefully monitored during treatment.

The rate of suicide-related events was 0.9% for both quetiapine (61/6270) and placebo (27/3047) in all indications and in all age groups, according to short-term placebo-controlled studies.

In these studies in patients with schizophrenia, the risk of suicide-related events was 1.4% (3/212) for quetiapine and 1.6% (1/62) for placebo in patients aged 18-24 years; 0.8% (13/1663) for quetiapine and 1.1% (5/463) for patients older than 25 years; 1.4% (2/147) for quetiapine and 1.3% (1/75) for placebo in patients under 18 years of age.

In patients with mania in bipolar disorder, the risk of suicidal events was 0% (0/67) for quetiapine and 0% (1/57) for placebo in patients aged 18-24 years; 1.2% (6/496) for quetiapine and 1.2% (6/503) for placebo in patients older than 25 years; 1% (2/193) for quetiapine and 0% (0/90) for placebo in patients under 18 years of age (see “Special Indications”).

In depressed patients with bipolar disorder, the risk of suicidal events was 3% (7/233) for quetiapine and 0% (0/120) for placebo in patients aged 18-24 years; 1.8% (19/1616) for quetiapine and 1.8% (11/622) for placebo in patients over 25 years. There have been no studies involving depressed patients with bipolar disorder under 18 years of age.

Seroquel Prolong may cause drowsiness, so patients should not operate machinery that are hazardous during treatment, including driving vehicles.

Contraindications

• high sensitivity to any of the ingredients of Seroquel Prolong;
• lactase deficiency, glucose-galactose malabsorption and galactose intolerance;
• co-administration with cytochrome P450 inhibitors such as azole antifungals, erythromycin, clarithromycin, nefazodone, as well as corticosteroidsco-administration with cytochrome P450 inhibitors such as azole antifungals, erythromycin, clarithromycin and nefazodone as well as protease inhibitors;
• Age under 18 years (although the efficacy and safety of Seroquel Prolong in children and adolescents aged 10-17 years has been studied in clinical trials).

With caution:

• cardiovascular and cerebrovascular disease or other conditions predisposing to arterial hypotension;
• old age;
• hepatic insufficiency;
• convulsive seizures in history.

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Side effects

The most common side effects of Seroquel Prolong are drowsiness, dizziness, dry mouth, mild asthenia, constipation, tachycardia, orthostatic hypotension, and dyspepsia.

The administration of Seroquel Prolong, as well as other antipsychotics, may be accompanied by weight gain, fainting, development of malignant neuroleptic syndrome, leukopenia, neutropenia and peripheral edema.

The frequency of adverse reactions is graded as follows: very frequently – ≥1/10; frequently – ≥1/100, <1/10; infrequently – ≥1/1000, <1/100; rarely – ≥1/10000, <1/1000; very rarely – <1/10000, unspecified frequency.

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1. See. “Special Indications.”
2. Somnolence usually occurs within the first 2 weeks of initiating therapy and usually resolves with continued administration of Seroquel Prolong.
3. Symptomatic elevation of serum AST, ALT and GGT activity is possible, usually reversible with continued administration of Seroquel Prolong.
4. Like other antipsychotics and α₁-adrenoblockers, Seroquel Prolong often causes orthostatic hypotension accompanied by dizziness, tachycardia, in some cases – fainting, especially at the beginning of therapy.
5. There have been very rare cases of decompensation of diabetes mellitus.
6. The incidence of this side effect was estimated based on post-marketing surveillance of Seroquel Prolong.
7. Elevated fasting blood glucose concentration ≥126 mg/dL (≥7 mmol/L) or post-meal blood glucose ≥200 mg/dL (≥11.1 mmol/L), at least once determined.
8. A higher incidence of dysphagia on quetiapine compared to placebo has only been noted in patients with depression within the structure of bipolar disorder.
9. More than 7% excess initial body weight. Mostly occurs at the beginning of therapy.
10. In a study of withdrawal syndrome in short-term placebo-controlled clinical trials of Seroquel Prolong in monotherapy the following symptoms were noted: insomnia, nausea, headache, diarrhea, vomiting, dizziness and irritability. The incidence of withdrawal syndrome was significantly reduced 1 week after discontinuation.
11. Triglyceride concentrations ≥200 mg/dL (≥2.258 mmol/L) in patients ≥18 years or ≥150 mg/dL (≥1.694 mmol/L) in patients <18 years, at least at a single determination.
12. Total cholesterol concentration ≥240 mg/dL (≥6.2064 mmol/L) in patients ≥18 years old or ≥200 mg/dL (≥5.172 mmol/L) in patients <18 years old, at least at a single determination.
13. See later in the Instructions.
14. Decreased platelet count ≤100-10⁹/l, at least at a single determination.
15. Without association with malignant neuroleptic syndrome. According to clinical studies.
16. May increase prolactin concentration in patients ≥18 years old: >20 mcg/L (≥869.56 pmol/L) in men; >30 mcg/L (≥1304.34 pmol/L) in women.
17. May lead to falls.
18. Decreased HDL cholesterol concentration <40 mg/dL in men and <50 mg/dL in women.

QT interval prolongation, ventricular arrhythmias, sudden death, cardiac arrest, and bidirectional ventricular tachycardia are considered side effects inherent to neuroleptics.

The incidence of EPS in short-term clinical trials in schizophrenia and mania within bipolar disorder was comparable in the quetiapine and placebo groups (schizophrenia patients: 7.8% in the quetiapine group and 8% in the placebo group; mania within bipolar disorder: 11.2% in the quetiapine group and 11.4% in the placebo group).

The incidence of EPS in short-term clinical trials for depression in the structure of bipolar disorder was 8.9% in the quetiapine group and 3.8% in the placebo group. At the same time, the frequency of individual symptoms of EPS (such as akathisia, extrapyramidal disorders, tremor, dyskinesia, dystonia, anxiety, involuntary muscle contractions, psychomotor agitation, and muscle rigidity) was generally low and did not exceed 4% in each treatment group. In long-term clinical trials of quetiapine in schizophrenia and bipolar disorder, the incidence of EPS was comparable in the quetiapine and placebo groups.

A small dose-dependent decrease in thyroid hormone concentrations, particularly total thyroxine (T4) and free T4, may be observed during quetiapine therapy. The maximum decrease of total and free T4 was registered at the 2nd and 4th weeks of treatment with Seroquel Prolong, with no further decrease of hormone concentrations during long-term treatment. In almost all cases, the concentration of total and free T4 returned to the initial level after discontinuation of treatment with Seroquel Prolong, regardless of the duration of treatment. A slight decrease in total triiodothyronine (T3) and inverse T3 was observed only with high doses. Thyroxine-binding globulin (TSH) concentration remained unchanged, no increase in TTH concentration was noted.

Overdose

Symptoms. A fatal outcome has been reported when 13.6 g of quetiapine was taken in a patient in a clinical trial and a fatal outcome after taking 6 g of quetiapine in a post-marketing study of the drug. At the same time, there has been a non-fatal case of quetiapine administered in doses greater than 30 g.

There have been reports of extremely rare cases of quetiapine overdose resulting in prolonged QT_s interval, death or coma.

In patients with a history of severe cardiovascular disease, the risk of side effects may increase with overdose.

The symptoms noted in overdose were mostly due to an increase in the known pharmacological effects of the drug, such as drowsiness and sedation, tachycardia, and decreased BP.

Treatment. There are no specific antidotes to quetiapine. In cases of severe intoxication it is necessary to remember about the possibility of overdose of several drugs. It is recommended to carry out measures aimed at maintaining respiratory function and cardiovascular system, ensuring adequate oxygenation and ventilation. Gastric lavage (after intubation if the patient is unconscious) and the use of activated charcoal and laxatives may facilitate excretion of unabsorbed quetiapine, but the effectiveness of these measures has not been studied.

Continuous medical monitoring should continue until the patient’s condition improves.

Similarities

Seroquel, Quetiapine