Common use
Quetiapine is an atypical antipsychotic used to treat mental health conditions such as:
- Schizophrenia
- Bipolar disorder
- Major depressive disorder (as an add-on therapy)
It helps restore the balance of neurotransmitters like dopamine and serotonin in the brain, improving mood, thinking, and behavior. In bipolar disorder, it can manage both manic and depressive episodes. It is also sometimes used off-label for insomnia or anxiety under medical supervision.
Dosage and direction
Quetiapine is available in two forms:
- Immediate-release
- Extended-release
Doses range widely based on the condition treated. Key points:
- Usually started at a low dose (50-100 mg per day) and gradually increased
- Extended-release tablets are taken once daily in the evening
- Immediate-release may be taken 2-3 times daily
- Do not crush or chew extended-release tablets
Always follow your doctor's instructions exactly for best results.
Precautions
Before using quetiapine, inform your doctor if you have:
- Heart disease history
- Diabetes
- High cholesterol
- Liver issues
- Low white blood cell count
Important safety information:
- May cause dizziness or drowsiness - avoid alcohol and be cautious when driving
- May increase risk of weight gain and blood sugar changes (monitoring needed)
- Not for elderly patients with dementia-related psychosis (increased death risk)
Contraindications
Quetiapine should not be used:
- If allergic to the drug or its components
- In patients at risk for QT prolongation
- For treating psychosis in elderly patients with dementia
Special considerations:
- Use caution with other medications affecting heart rhythm
- Safety in pregnancy and breastfeeding not well established
Possible side effects
Common side effects include:
- Drowsiness
- Dry mouth
- Dizziness
- Weight gain
- Constipation
- Blurred vision
- Increased appetite
- Blood pressure changes
Serious side effects requiring immediate medical attention:
- Tardive dyskinesia (involuntary muscle movements)
- Neuroleptic malignant syndrome
- Severe metabolic changes
- Suicidal thoughts
- Rapid heartbeat
- Fainting
Drug interactions
Quetiapine may interact with:
- Drugs affecting liver enzymes (CYP3A4) like ketoconazole, phenytoin, rifampin
- Other central nervous system depressants
- Alcohol (increases drowsiness and side effects)
Always tell your doctor about all medications and supplements you're taking for safe use.
Missed dose
If you miss a dose:
- Take it as soon as you remember
- Skip if close to next scheduled dose (do not double up)
- Maintain a consistent routine for best results
- Contact your healthcare provider if multiple doses missed
Overdose
Overdose symptoms may include:
- Extreme drowsiness
- Rapid heart rate
- Fainting
- Seizures
- Coma (in severe cases)
- Cardiac arrhythmias (in severe cases)
Seek immediate emergency medical attention if overdose is suspected. Hospital treatment typically involves supportive care.
Storage
For proper quetiapine storage:
- Keep at room temperature (20°C-25°C / 68°F-77°F)
- Store away from light and moisture
- Keep in original container tightly closed
- Do not use expired medication
- Keep out of reach of children and pets
Disclaimer
We provide only general information about medications which does not cover all directions, possible drug integrations, or precautions. Information at the site cannot be used for self-treatment and self-diagnosis.
Any specific instructions for a particular patient should be agreed with your health care adviser or doctor in charge of the case. We disclaim reliability of this information and mistakes it could contain.
We are not responsible for any direct, indirect, special or other indirect damage as a result of any use of the information on this site and also for consequences of self-treatment.
