Quetiapine
About Quetiapine
This medication is an atypical antipsychotic used to treat mental health conditions such as schizophrenia and bipolar disorder. It helps rebalance chemical messengers in the brain to improve mood, thinking, and behaviour. Your doctor may also prescribe it alongside other medicines for major depressive disorder.
To get the best results, you must take this medicine daily and consistently at the same time each day. You can take this medication with or without food, depending on your doctor's instructions. Combining this treatment with regular sleep patterns and stress management techniques can significantly support your progress.
Some people may experience mild side effects like drowsiness, dry mouth, or mild weight gain when starting this treatment. However, you must contact your doctor immediately if you experience serious symptoms, such as severe muscle stiffness, high fever, or uncontrollable muscle movements.
Before starting this medication, talk to your doctor if you have a history of heart disease, diabetes, thyroid issues, or liver damage. Do not take this if you have had a severe allergic reaction to this medicine or any of its ingredients in the past.
This medicine can interact with alcohol, blood pressure medications, and sleep aids, which may excessively increase drowsiness or affect your blood pressure. Special groups, including pregnant women, breastfeeding mothers, and elderly individuals, must consult their doctor before using this medicine to ensure safety.
Uses of Quetiapine
• Bipolar Disorder Management: Quetiapine is commonly used to treat the manic and depressive episodes associated with bipolar disorder, helping to stabilize mood and reduce the frequency of mood swings.
• Schizophrenia Treatment: Quetiapine is effective in managing symptoms of schizophrenia, such as hallucinations, delusions, and disorganized thinking, enabling patients to function better in daily life.
• Generalized Anxiety Disorder: Quetiapine may be prescribed to address symptoms of generalized anxiety disorder, providing relief from excessive worry and tension in patients.
• Adjunctive Therapy for Major Depressive Disorder: In some cases, Quetiapine is used as an add-on treatment for individuals who are not adequately responding to traditional antidepressants, helping to alleviate depressive symptoms.
• Insomnia Management: Due to its sedative properties, Quetiapine can sometimes be used off-label to treat insomnia, helping patients achieve better sleep quality and duration.
Medicinal Benefits
Quetiapine helps manage certain mental health conditions by restoring the balance of chemicals in the brain. It supports emotional stability, clearer thinking, and improved daily functioning.
- Stabilises Mood: Helps reduce mood swings and supports emotional balance in people with mood disorders.
- Improves Thought Clarity: Helps reduce confusion, disturbed thinking, and other symptoms that may affect concentration and decision-making.
- Reduces Anxiety and Agitation: May help promote a sense of calm and improve emotional well-being.
- Supports Better Sleep: Helps improve sleep quality by reducing symptoms that may interfere with normal sleep patterns.
- Enhances Daily Functioning: Better symptom control may improve social interactions, work performance, and overall quality of life.
Directions for Use
Always take this medicine exactly as your doctor has prescribed. Here are the standard guidelines for taking this oral medication:
- Swallow the tablet whole with a full glass of water.
- If you have been prescribed an extended-release (XR) tablet, swallow it whole and do not crush, chew, or split it, as this can affect
- how the medicine is released into your body. If you are unsure which formulation you are taking, check with your doctor or pharmacist.
- Immediate-release and extended-release formulations may have different dosing schedules. Always follow the specific instructions provided for your prescribed product.
- You can take this medicine with or without food, but be consistent with how you take it each day.
- Take your dose at the same time every day to keep a steady amount of the medicine in your body.
Your doctor will determine the right dose for you and may adjust it over time. Never alter your dose or stop taking this medication without consulting your healthcare provider first.
Storage
Side Effects of Quetiapine
Common Side Effects (Usually mild)
- Drowsiness or extreme sleepiness
- Dry mouth
- Dizziness, especially when standing up quickly
- Weight gain or increased appetite
- Constipation or mild upset stomach
Serious Side Effects (Consult your doctor right away)
- Neuroleptic Malignant Syndrome (NMS), a rare but serious condition characterised by high fever, severe muscle stiffness, sweating, confusion, and changes in heart rate or blood pressure
- Tardive dyskinesia, which may cause uncontrollable twitching or repetitive movements of the face, tongue, mouth, or limbs
- Extreme dizziness, lightheadedness, or fainting
- Signs of high blood sugar, such as constant thirst, frequent urination, and increased hunger
- Severe allergic reactions, including skin rash, swelling of the face, tongue, or throat, and difficulty breathing
Medicines Containing this Salt
View AllDrug Warnings
Do Not Stop Treatment Suddenly: Abruptly stopping Quetiapine may cause withdrawal symptoms such as nausea, vomiting, sweating, headache, irritability, and sleep disturbances. If treatment needs to be discontinued, your doctor will advise you on gradually reducing the dose.
- Use Caution During Activities: Quetiapine may cause drowsiness, dizziness, or slowed reaction times. Avoid driving, operating machinery, or performing hazardous activities until you know how the medicine affects you.
- Stand Up Slowly: This medicine may cause a sudden drop in blood pressure when standing up. Rise gradually from sitting or lying positions to reduce the risk of dizziness, lightheadedness, and falls.
- Attend Regular Health Check-Ups: Your doctor may monitor your weight, blood sugar, cholesterol levels, and blood pressure during treatment, as Quetiapine can affect metabolism and overall cardiovascular health.
- Monitor Heart Health: Inform your doctor if you have a history of heart rhythm problems, fainting episodes, or heart disease. Quetiapine can rarely cause QT prolongation, which may increase the risk of serious heart rhythm disturbances.
- Important Safety Information: Quetiapine is not approved for the treatment of dementia-related psychosis. Elderly patients with dementia-related psychosis who are treated with antipsychotic medicines have an increased risk of death compared with those not receiving these medicines.
- Monitor Mood Changes: Contact your doctor immediately if you experience new or worsening depression, suicidal thoughts, self-harming thoughts, unusual behavioural changes, or increased agitation, particularly during the first few months of treatment or after a dose adjustment.
- Avoid Alcohol: Drinking alcohol while taking Quetiapine can increase drowsiness, dizziness, and impaired judgment.
Inform Healthcare Providers: Tell your doctor, dentist, pharmacist, or other healthcare professionals that you are taking Quetiapine before starting new medicines or undergoing medical procedures.
Drug Interactions
Drug-Drug Interactions
The following medicines may interact with Quetiapine and require dose adjustments, additional monitoring, or avoidance:
- Strong CYP3A4 inhibitors (such as ketoconazole, itraconazole, clarithromycin, ritonavir): May significantly increase Quetiapine levels in the body and raise the risk of side effects.
- Strong CYP3A4 inducers (such as carbamazepine, phenytoin, rifampicin): May reduce Quetiapine levels and make treatment less effective.
- Blood pressure medicines: May increase the risk of low blood pressure, dizziness, and fainting when used with Quetiapine.
Medicines that cause drowsiness (such as sleeping tablets, anti-anxiety medicines, opioid pain medicines, antihistamines, and muscle relaxants): May increase sedation, drowsiness, and impaired alertness. - Medicines that affect heart rhythm: May increase the risk of QT prolongation and serious heart rhythm disturbances when taken with Quetiapine.
Drug-Food Interactions
Certain foods and beverages may affect how Quetiapine works or increase the risk of side effects:
- Grapefruit and grapefruit juice: May increase Quetiapine levels in the body and raise the risk of side effects.
- Alcohol: May increase drowsiness, dizziness, impaired judgement, and the risk of falls.
Drug-Disease Interactions
Inform your doctor if you have any of the following conditions before taking Quetiapine, as additional monitoring or dose adjustments may be required:
- Heart disease or QT prolongation: May increase the risk of abnormal heart rhythms.
- Diabetes: Quetiapine may affect blood sugar control and require closer monitoring.
- Thyroid disorders: May require monitoring during treatment.
- Liver disease: Dose adjustments and monitoring may be necessary.
- Kidney disease: Dose adjustment is generally not required, but your doctor may monitor your condition more closely.
- Seizure disorders: Quetiapine may increase the risk of seizures in susceptible individuals.
Drug-Drug Interactions Checker List:
Safety Advice
Alcohol
unsafeAlcohol may worsen the condition and increase the risk of side effects while using Quetiapine.
Pregnancy
cautionQuetiapine is a category C medicine. It should be used in pregnant women only when prescribed by a doctor.
Breast Feeding
cautionQuetiapine should not be given to breastfeeding mothers unless prescribed by a doctor.
Driving
cautionQuetiapine may cause dizziness. So, it is not recommended to drive or operate heavy machinery when you take Quetiapine.
Liver
cautionQuetiapine should be used with caution in patients with liver diseases. Dose adjustments may be necessary.
Kidney
cautionQuetiapine should be used with caution in patients with kidney diseases. Dose adjustments may be necessary.
Children
unsafeQuetiapine is not recommended for use in children under 12 years of age.
Habit Forming
Diet & Lifestyle Advise
- Monitor your nutrition: Since this medicine can increase appetite and affect metabolism, focus on a balanced diet rich in vegetables, lean proteins, and whole grains, while limiting high-calorie and sugary foods.
- Stay well hydrated: Drink plenty of water throughout the day to help manage dry mouth and prevent constipation.
- Avoid sudden temperature extremes: This medication can make it harder for your body to regulate temperature. Avoid getting overheated during exercise, in hot weather, or while using hot tubs.
- Limit caffeine and avoid alcohol: Caffeine can interfere with your sleep patterns, while alcohol can severely increase drowsiness and worsen coordination.
Special Advise
- Quetiapine may increase blood sugar levels even if you don't have diabetes, especially in patients with schizophrenia. So, it is recommended to immediately inform your doctor if you have symptoms such as increased thirst, frequent urination, fatigue or increased appetite.
- If you are having a urine drug screen (an analysis to determine the presence of illegal drugs or drugs that are mostly abused, such as methadone or tricyclic antidepressants in the blood), the test results may show positive when certain test methods are used. A more specific test may be required in such cases.
- Do not take grapefruit or grapefruit juice while using Quetiapine as it may alter the effects of the medicine.
Patients Concern
Disease/Condition Glossary
Schizophrenia: Schizophrenia (psychosis) is a mental illness in which the processing of brain information is affected. Symptoms include hallucinations (seeing or hearing unreal things), delusions (false beliefs) and withdrawal from society. They lose the ability to differentiate reality from false beliefs.
Bipolar disorder: Bipolar disorder or manic depression: Patients with bipolar disorders have mood swings ranging from manic episodes of heightened excitement to severe depression. Bipolar disorder may occur due to genetic factors, alcohol or drug abuse and mental trauma.
FAQs
Quetiapine is used in the treatment of bipolar depression, mania‚ and schizophrenia.
Quetiapine contains quetiapine, which works by blocking dopamine receptors in the brain. By inhibiting the synthesis of the dopamine hormone, there will be a decrease in the occurrence of symptoms in patients with schizophrenia and bipolar depression. Quetiapine also has effects on other neurotransmitters in the brain, such as serotonin, and its beneficial effects may also be related to this. Altogether, Quetiapine rebalances dopamine and serotonin to improve thinking, mood and behaviour.
Quetiapine may cause dizziness and may increase the risk of falls. So, stand up slowly when rising from a sitting or lying position.
Do not drive or operate heavy machinery after taking Quetiapine as it causes drowsiness.
The long-term use of Quetiapine may cause potential side effects such as tardive dyskinesia (uncontrolled movements of arms and legs), increased blood sugar, vision impairment, and weight gain. However, if the benefits outweigh the risks, your doctor prescribes Quetiapine for a prolonged period.
Quetiapine is not recommended for use in children and adolescents under the age of 18 years. In children, it may cause potential side effects such as swelling of breasts in boys and girls, irregular periods and weight gain.
Before using this medication, you should inform your doctor about your medical history, including any ongoing medicines, to avoid potential interactions and minimise side effects.
Taking more than the recommended dosage does not provide additional relief and can increase the risk of adverse effects.
No, Quetiapine is not a sleeping pill. While it can sometimes cause drowsiness as a side effect, its primary purpose is to treat mental health conditions like schizophrenia and bipolar disorder.
While not specifically designed for anxiety, Quetiapine can help to manage anxiety symptoms in some individuals. However, it should only be taken if prescribed by the doctor.
To avoid potential side effects while taking Quetiapine, it's essential to be clear of alcohol and grapefruit. Certain medications can also interact with quetiapine, so always consult your doctor before combining them. Remember, quetiapine can cause drowsiness, so exercise caution when driving or operating machinery. And never abruptly stop taking it without consulting your healthcare provider.
Take Quetiapine precisely as your doctor prescribes. Your dosage and how often you take it depends on your situation. Follow your doctor's instructions closely to get the best results and reduce side effects.
Common side-effects of Quetiapine are dizziness, drowsiness, headache, dry mouth, abnormal muscle movements such as difficulty moving muscles, tremors and muscle stiffness, change in cholesterol levels, weight gain, and decrease in haemoglobin (protein in blood that carries oxygen) levels. Additionally, in children and adolescents, swelling of breasts in boys and girls and production of breast milk (due to an increase in prolactin hormone (helps in producing breast milk)) and irregular menstruation can be seen.
It is essential to tell your doctor about all medications you are taking, including over-the-counter treatments, herbal supplements, and prescription prescriptions. Certain drugs may interact with quetiapine, increasing the risk of adverse effects.
Quetiapine can pass into breast milk. Discuss the potential risks and benefits with your doctor if you're breastfeeding.
Yes, Quetiapine may cause drowsiness or sedation. This is a common side effect, especially when starting the medication or increasing the dosage.
No, Quetiapine is not a controlled substance. However, it is a prescription medication and should only be taken as directed by a healthcare provider.
Take the missed dose as soon as you remember unless it's almost time for your next dose. In this case, skip the missed dose and take your next dose at the regular time. Never take a double dose to make up for a missed one.
No, you should avoid drinking alcohol while taking Quetiapine. Alcohol can greatly increase the drowsiness and dizziness caused by this medication, which can make everyday tasks dangerous. Talk to your doctor.
Some effects, such as improved sleep, reduced anxiety, reduced agitation, or relief from symptoms of acute mania, may begin within the first few days to two weeks of treatment. However, the full benefits for mood stabilisation, schizophrenia symptoms, or depression may take several weeks, often around 4 to 6 weeks or longer. Continue taking the medicine exactly as prescribed and attend regular follow-up appointments. Talk to your doctor if you have concerns about your progress.
Yes, weight gain is a common side effect of this medication because it can increase your appetite and affect your metabolism. Eating a balanced diet and exercising regularly can help manage this. Talk to your doctor.
No, you must not stop taking this medicine suddenly, even if you feel completely better. Stopping abruptly can cause withdrawal symptoms or lead to your original symptoms returning. Your doctor will help you stop safely by gradually decreasing dose. Talk to your doctor.
You must discuss the benefits and risks of taking Quetiapine during pregnancy with your healthcare provider. This medicine should only be used during pregnancy if your doctor determines that the potential benefit outweighs the possible risks. Babies exposed to antipsychotic medicines during the third trimester may experience symptoms such as muscle stiffness, tremors, feeding difficulties, breathing problems, or withdrawal symptoms after birth. Inform your doctor immediately if you become pregnant while taking this medicine.
This medicine affects chemical pathways in the brain that control sleep and alertness, commonly causing sedation. This effect is usually strongest when starting the medication or during a gradually increasing dose phase, and it may decrease over time. Talk to your doctor.
Yes, this medicine can affect your body's metabolism and lead to increased blood sugar levels. Your doctor will likely want to monitor your blood sugar regularly, especially if you have a history of diabetes. Talk to your doctor.
Because this medicine frequently causes drowsiness, it is often prescribed to be taken once a day at bedtime. However, you should always follow the exact schedule and timing recommended by your doctor. Talk to your doctor.
Yes. In some people, particularly children, adolescents, and young adults, Quetiapine may be associated with new or worsening depression, suicidal thoughts, agitation, or unusual behavioural changes. Contact your doctor immediately if you notice any concerning changes in mood, thoughts, or behaviour.
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