Quetiapine
Quetiapine is an antipsychotic medicine. In the UK it is used for conditions such as schizophrenia, bipolar disorder, and sometimes as add-on treatment for depression when a specialist or GP prescribes it.
This medicine is part of the Mental health medicines category.
Generic name: quetiapine
Quick answers
Short replies to searches people often run before speaking to a clinician. For the overview of what the medicine is used for, see the short summary under the page title above.
What is it for?
Quetiapine is an antipsychotic medicine.
How long does it take to work?
Onset varies by condition and dose. Your GP or pharmacist can explain what to expect and when to review.
What are common side effects?
Common effects include drowsiness, dizziness, dry mouth, constipation, weight gain, and raised blood fats or blood sugar in some people.
Can you take paracetamol or ibuprofen with it?
Ask your GP or pharmacist before taking Quetiapine with paracetamol or ibuprofen. Many adults use paracetamol for short periods when appropriate; NSAIDs such as ibuprofen need extra checks with your other medicines and health conditions.
More about what Quetiapine is used for
Quetiapine is an antipsychotic medicine. In the UK it is used for conditions such as schizophrenia, bipolar disorder, and sometimes as add-on treatment for depression when a specialist or GP prescribes it.
Low doses are sometimes used off-label for insomnia, but this is not first-line and needs careful medical judgement.
How does Quetiapine work, and how long does it take to work?
It blocks several brain chemical receptors, especially dopamine and serotonin pathways, which can reduce psychosis, mania, or severe mood symptoms in appropriate diagnoses.
Sedation is common, especially at lower doses.
How and when should you take Quetiapine?
Dosing varies widely by condition — once or twice daily, often starting low and increasing gradually. Swallow tablets with water; some people use prolonged-release tablets as prescribed.
Do not stop suddenly without medical advice — relapse or withdrawal symptoms can occur.
What are the common side effects of Quetiapine?
Common effects include drowsiness, dizziness, dry mouth, constipation, weight gain, and raised blood fats or blood sugar in some people.
Standing up slowly can reduce dizziness.
Serious side effects of Quetiapine — when to get urgent help
Seek urgent help for high fever, muscle stiffness, confusion (possible neuroleptic malignant syndrome), severe allergic reaction, suicidal thoughts, or signs of a blood clot (leg swelling, chest pain, breathlessness).
Long-term use needs monitoring for metabolic and movement side effects.
What if you miss a dose of Quetiapine?
If you miss a dose, take it when you remember unless nearly time for the next. Do not double up.
Who should not take Quetiapine?
Not suitable for everyone — dementia-related psychosis in older people has particular warnings. Caution in heart disease, epilepsy, diabetes, liver problems, and low white cell history.
Elderly people with stroke risk factors need careful assessment.
Can you take paracetamol or ibuprofen with Quetiapine? — other interactions
Other sedatives, blood pressure medicines, QT-prolonging drugs, and enzyme inhibitors can interact. Always check new prescriptions.
Alcohol increases sedation.
Quetiapine in pregnancy and breastfeeding
Discuss with your psychiatrist or GP — antipsychotic use in pregnancy and breastfeeding is individually planned.
Blood tests and monitoring on Quetiapine
Weight, waist, blood pressure, glucose, and lipids may be checked periodically. Blood tests and ECG may be used in some situations.
What might your GP prescribe instead of Quetiapine?
Your team may consider other antipsychotics, mood stabilisers, antidepressants, or psychological therapies depending on diagnosis and response.
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Frequently asked questions about Quetiapine
People also ask — common Google searches
- What is Quetiapine used for?
- Quetiapine is an antipsychotic medicine. In the UK it is used for conditions such as schizophrenia, bipolar disorder, and sometimes as add-on treatment for depression when a specialist or GP prescribes it.
- How long does Quetiapine take to work?
- Onset varies by condition and dose. Your GP or pharmacist can explain what to expect and when to review. Always follow your prescriber’s follow-up plan.
- Can you take Quetiapine with paracetamol or ibuprofen?
- Ask your GP or pharmacist before taking Quetiapine with Paracetamol or Ibuprofen. Many adults use paracetamol for short periods when appropriate; NSAIDs such as ibuprofen need extra checks with your other medicines and health conditions.
- What are the side effects of Quetiapine?
- Common effects include drowsiness, dizziness, dry mouth, constipation, weight gain, and raised blood fats or blood sugar in some people. Standing up slowly can reduce dizziness. See the sections below for more detail, including serious side effects and when to seek urgent help.
- Why is quetiapine prescribed for sleep?
- It is sedating, but using antipsychotics mainly for insomnia is not routine first-line care. If you have been given it for sleep, your prescriber should have weighed risks and benefits.
- Will quetiapine cause weight gain?
- Weight gain is common for some people. Your team may monitor weight, diet, and blood tests and adjust treatment if needed.
Need personalised advice?
Your local pharmacist or GP surgery can help with questions about your medicines, side effects, and alternatives that may be suitable for you.
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Often used with
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