Quetiapine: The Atypical Antipsychotic for Mental Health Disorders
What is Quetiapine?
Quetiapine is a second generation atypical antipsychotic used in cases of schizophrenia, bipolar disorder, and major depressive disorder (as an adjunct). It balances the levels of dopamine and serotonin in the brain, and helps to manage the symptoms of psychosis, mania, and depression.
How Quetiapine Works
Quetiapine affects several neurotransmitter systems in the brain, including dopamine and serotonin receptors. By modulating these systems, Quetiapine helps reduce the symptoms of hallucinations, delusions, and disorganized thinking associated with schizophrenia and other mental health conditions.
When to Use Quetiapine
● Schizophrenia: Quetiapine is used to treat both acute and chronic schizophrenia.
● Bipolar Disorder: It is prescribed for both mania and depression in bipolar disorder, often in combination with other medications.
● Major Depressive Disorder: It is used as an adjunct in depression when other antidepressants are insufficient.
Dosage
● Adult Dose for Schizophrenia: Started as 25 mg twice a day with increase the dose by 25 mg to around 300-400 mg by day 4. Maximum dose is 800 mg/day.
● Adult Dose for Bipolar Disorder: The starting dose is
Day 1: 50 mg single dose at bedtime.
Day 2: 100 mg single dose at bedtime.
Day 3: 200 mg single dose at bedtime.
Day 4: 300 mg single dose at bedtime.
Maintenance therapy is 300 mg/day.
● Pediatric dosage: Safety and efficacy not established for patients below 10 years of age. For patients between 10-17 years the dose is established based on weight and condition.
Common Indian brands: Qutipin, Qutan.
Side Effects
● Common Effects: Drowsiness, weight gain, dry mouth, and dizziness.
● Serious Adverse Effects: Metabolic syndrome, diabetes, cardiovascular problems, and extrapyramidal symptoms (movement disorders).