Quick Facts
Generic NameQuetiapine
Brand NameSeroquel
Drug ClassSGA
FDA Approved1997
Starting Dose25–50mg at bedtime
Typical Range150–800mg/day
Max Dose800mg/day
Half-Life6–7 hours
MetabolismCYP3A4 (major)
Generic Available2012
What Is Seroquel?
Quetiapine (brand name Seroquel) is a second-generation (atypical) antipsychotic (SGA) prescribed for bipolar disorder, schizophrenia, bipolar depression, and other psychiatric conditions. Dose-dependent pharmacology: sleep aid → antidepressant → antipsychotic. Broadest FDA bipolar approval of any single medication. XR formulation for once-daily dosing. Active metabolite norquetiapine has antidepressant properties.
At Psychiatry Telemed, quetiapine is prescribed and monitored by board-certified psychiatrists who understand the nuances of SGA pharmacology — selecting the right dose, managing side effects, monitoring drug interactions, and optimizing your treatment through consistent monthly medication management appointments.
Quetiapine (Seroquel) — SGA medication for psychiatric care
ManufacturerAstraZeneca
How Seroquel Affects Neurotransmitters
How Seroquel Works
Quetiapine has dose-dependent pharmacology: at low doses (25–100mg), antihistaminergic and alpha-adrenergic blockade predominate, producing sedation. At moderate doses (150–300mg), 5-HT2A antagonism and norepinephrine reuptake inhibition (via active metabolite norquetiapine) produce antidepressant effects. At high doses (400–800mg), D2 antagonism provides antipsychotic effects.
Efficacy: Seroquel vs. Comparators
Efficacy Comparison
Response & remission rates vs. comparators (Cipriani et al. meta-analysis)
Data from published meta-analyses. Individual response may vary.
Conditions Treated with Seroquel
Bipolar Disorder
FDA-approved for bipolar mania, bipolar depression, and maintenance — broadest bipolar approval.
Learn About Bipolar DisorderBipolar Depression
FDA-approved for bipolar depression (300mg). One of few options for this indication.
Learn About Bipolar DepressionInsomnia
Off-label at low doses (25–100mg) for insomnia. Widely prescribed despite metabolic concerns.
Learn About InsomniaConsidering Seroquel?
Board-certified psychiatrists can determine if quetiapine is right for you.
Dosage Information
| Indication | Starting Dose | Typical Range | Maximum |
|---|---|---|---|
| Bipolar Disorder | 25–50mg at bedtime | 150–800mg/day | 800mg/day |
| Schizophrenia | 25–50mg at bedtime | 150–800mg/day | 800mg/day |
| Bipolar Depression | 25–50mg at bedtime | 150–800mg/day | 800mg/day |
| Insomnia | 25–50mg at bedtime | 150–800mg/day | 800mg/day |
Brain Regions Targeted by Seroquel
Side Effects
Like all medications, quetiapine has potential side effects. Most are mild, occur early in treatment, and resolve within 1–2 weeks. Your psychiatrist monitors at every appointment.
Common Side Effects
Weight GainDrowsiness/SedationDizzinessMetabolic EffectsAkathisiaDry Mouth
Less Common
Orthostatic HypotensionConstipationEPS/TremorProlactin ElevationQTc Changes
Serious (Seek Immediate Help)
Metabolic SyndromeNeuroleptic Malignant SyndromeTardive DyskinesiaDiabetic Ketoacidosis
Side Effect Profile: Seroquel vs. Class Average
Side Effect Profile
Incidence rates from FDA prescribing information vs. class average
Percentages from clinical trial data. Actual experience may differ.
⚠️ FDA Black Box Warning
Antidepressants may increase suicidal thinking in young adults under 25.
Drug Interactions
Major Interactions
CNS depressants (additive sedation), CYP inhibitors/inducers (varies by drug), QTc-prolonging agents
CYP Metabolism
Substrate of CYP3A4 (major). Consult drug interaction database for specific combinations.
Alcohol
Avoid alcohol during quetiapine treatment. Both affect the CNS, increasing sedation and impairing judgment.
Generic Versions & Cost
Generic quetiapine available since 2012. Approximate cost: $10–25/month. FDA-certified bioequivalent to brand-name Seroquel.
Starting Seroquel: What to Expect
First Weeks
Quetiapine is typically started at 25–50mg at bedtime and increased gradually. Common initial side effects usually improve within 1–2 weeks. Full therapeutic benefit develops over 4–8 weeks.
When to Contact Your Psychiatrist
Contact your psychiatrist for: worsening depression/anxiety, thoughts of self-harm, unusual agitation, severe side effects, or any concerning changes.
Stopping Seroquel Safely
Never stop quetiapine abruptly. Your psychiatrist will develop a gradual tapering schedule to minimize discontinuation effects.
Timeline: When Seroquel Starts Working
Timeline to Effectiveness
Expected improvement trajectory over the first 8 weeks
Based on clinical trial data. Full therapeutic effects may take 6–8 weeks.
Get Seroquel from a Board-Certified Psychiatrist
At Psychiatry Telemed, quetiapine is prescribed following comprehensive evaluation. All Florida via HIPAA-compliant telepsychiatry. 1–3 days. $200 eval, $100 follow-up.
Frequently Asked Questions
Prescribed for bipolar disorder, schizophrenia, bipolar depression, insomnia.
Typically 2–4 weeks for initial improvement, 4–8 weeks for full benefit.
Common: weight gain, drowsiness/sedation, dizziness, metabolic effects, akathisia. Most resolve within 1–2 weeks.
No. Not habit-forming but should not be stopped abruptly — gradual tapering recommended.
Dose-dependent pharmacology: sleep aid → antidepressant → antipsychotic. Broadest FDA bipolar approval of any single medication. XR formulation for once-daily dosing. Active metabolite norquetiapine h
Alcohol should be avoided — increases sedation, impairs judgment, and may worsen symptoms.
Resources
Medical Disclaimer: Educational only. Consult a psychiatrist before starting/stopping medication. Crisis: call 988 or 911.
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