Seroquel is used for the treatment of bipolar disorder, depression and schizophrenia. Seroquel works by restoring the balance of certain neurotransmitters in the brain.


Quetiapine fumarate



Astra Zeneca


25 mg, 100 mg, 200 mg, 300 mg




Seroquel, which is the name for quetiapine, is widely used as an antipsychotic medication worldwide. Its introduction and integration into the field have brought hope for effective treatment of various psychiatric disorders.

Brief Overview of Seroquel

Seroquel is part of a group of medications called antipsychotics. These medications are different from the types of antipsychotics in terms of how they work and the conditions they can treat.



While traditional antipsychotics were mainly used for schizophrenia, the introduction of versions, like Seroquel expanded the possibilities for treating a wider range of conditions.

Historical Development and Approval

The story of how Seroquel was developed goes back to the late 20th century. It became a source of hope during a time when people were looking for more effective alternatives to antipsychotic medications.

  • In the 1980s, initial research and clinical trials began the process of bringing this compound to the forefront.
  • After evaluations that focused on its safety and effectiveness, it received FDA approval in 1997.
  • Over the years, its uses in therapy expanded and its clinical usage grew exponentially.

Commonly Prescribed Conditions

Initially developed for the treatment of schizophrenia, Seroquel has since found its place in a range of therapeutic applications.

  • It is now commonly prescribed for conditions such as disorders, including manic, depressive and maintenance phases.
  • Additionally it serves as a treatment for major depressive disorder and is effective in managing both acute exacerbations and long term symptoms of schizophrenia.
  • Some healthcare professionals may also prescribe it, off label to address insomnia and anxiety disorders based on their judgment.


Schizophrenia flow chart

How Seroquel Works

Mechanism of Action in the Brain

Understanding how Seroquel works is like unraveling the melodies of a symphony. Essentially, Seroquel mainly focuses on dopamine and serotonin receptors.

  • Blocking dopamine D2 receptors and serotonin 5 HT2A receptors helps regulate activity associated with certain mental health conditions.
  • It also has an affinity for receptors, expanding its therapeutic capabilities and benefits.
  • Combining these interactions gives Seroquel its qualities as both an antipsychotic and mood stabilizer.

Time to Onset of Action

The way medications are processed in the body can vary, When it comes to Seroquel it usually takes about 1 to 2 hours after taking it for noticeable therapeutic effects to start appearing. However for its impact especially in terms of improving mental well being it often requires a longer period of time ranging from days to weeks.

Duration of Therapeutic Effects

The duration of Seroquel's effects depends on the dosage and the specific clinical condition it is used for. Typically the effects last for around 12 to 24 hours when used to alleviate symptoms.

With consistent use, it can help stabilize mood and manage psychiatric symptoms over a longer period of time. In summary, carefully adjusting the dosage and following a regimen are crucial, in maximizing its therapeutic timeline.

Uses of Seroquel

Primary Indications

Seroquel, a medication in the category of atypical antipsychotics, offers a wide range of therapeutic uses. Its scientific name, quetiapine, is often associated with;

  • Helping manage schizophrenia by addressing both flare-ups and long-lasting symptoms.(1)
  • Providing intervention for the disorder, including its various episodes such as manic episodes, depressive episodes and the maintenance phase between them.(2)
  • Serving as an additional treatment option for major depressive disorder when traditional antidepressants have not been effective.(3)

1. National Library of Medicine - Quetiapine fumarate (Seroquel): a new atypical antipsychotic

2. NCBI - Update on quetiapine in the treatment of bipolar disorder: results from the BOLDER studies

3. Science Direct - The use of quetiapine in the treatment of major depressive disorder: Evidence from clinical and experimental studies

How it Benefits the Patient

Looking beyond the terminology used in pharmacology, the true measure of Seroquel's effectiveness can be seen in the significant impact it has on those who benefit from it. Let's break it down further;

  • Addressing hallucinations and delusions; Seroquel acts as a stabilizing force providing relief to individuals struggling with the waves of schizophrenia.
  • Regulating mood swings; Through its interactions with receptors, Seroquel helps to balance the fluctuations that are characteristic of bipolar disorder.
  • Alleviating depressive symptoms; For those caught in the grip of depressive disorder, Seroquel can offer a guiding light towards a better future, especially when used alongside other antidepressant medications.

Duration of Treatment for Various Conditions

The path that Seroquel takes to provide benefits is not only influenced by its specific pharmacokinetics but also by the unique circumstances of each patient's condition. Generally speaking;

  • For schizophrenia, long-term treatment is essential to minimize relapses and maintain relief. This often lasts for years.
  • In the case of Bipolar disorder, the duration of treatment depends on the specific phase (manic, depressive, or maintenance). It can range from weeks for acute episodes to ongoing long-term administration for stabilization.
  • When treating depressive disorder, Seroquel is typically used as an adjunct alongside primary antidepressant medication.

The duration of this combination therapy usually spans from months to years. It is important to note that these durations serve as guidelines and can be adjusted based on individual clinical assessments and patient needs.

Off-label Use of Seroquel

Common Off-label Indications

Seroquel, also known as quetiapine in the world has primarily made its mark in the field of antipsychotic medication. However it goes beyond its intended use. Has proven to be versatile in various off label applications;

1. Insomnia; Seroquel is often used as an aid for sleep when traditional sleep medications are not effective.

2. Generalized Anxiety Disorder (GAD); It can provide a sense of calm for individuals dealing with the effects of GAD.

3. Compulsive Disorder (OCD); When used alongside primary treatments, Seroquel helps reduce the intensity of intrusive obsessions and compulsions.

4. Traumatic Stress Disorder (PTSD): It serves as a safe haven for those haunted by traumatic experiences.

These expanded uses demonstrate the range of benefits that Seroquel can offer beyond its official indications.

Studies Supporting Off-label Use

The field of off-label use is quite intricate, where real-world evidence combines with expertise. Over the years, numerous studies have emerged, shedding light on the advantages of using Seroquel for purposes not officially approved;

  • A 2008 study found that quetiapine can effectively alleviate symptoms of generalized anxiety disorder (GAD), suggesting its potential as an anxiety-reducing medication.
  • Research carried out in 2007 emphasized its usefulness as a treatment for post-traumatic stress disorder (PTSD), showing a significant decrease in symptom severity among participants.
  • Several smaller pilot studies have hinted at its potential in managing compulsive disorder (OCD), although these initial findings require further investigation.
  • Its effectiveness in treating insomnia has been supported by clinical trials, where patients reported improved sleep quality and duration.

It's important to note that these studies vary greatly, ranging from controlled experiments to investigations, without strict controls.

Controversies and Debates

The journey of Seroquel off-label usage hasn't been without its challenges. The mix of praise and criticism has sparked debates;

  • Concerns about Dependency; Using Seroquel for insomnia, in particular, has raised worries about potential dependency and whether its appropriate to use an antipsychotic for a sleep disorder.
  • Side Effect Profile; The emergence of effects some unique to Seroquel has caused concerns within the medical community. This has prompted a reevaluation of its off label use.
  • Ethical Considerations; Striking a balance between advancements and ethical prescribing has often been precarious especially when powerful medications, like Seroquel are prescribed for conditions they weren't initially intended for.

Despite the controversies surrounding these issues, one thing is clear; using any medication off-label including Seroquel requires careful clinical judgment and solid empirical evidence.

Dosage and Administration

It's important to administer the right amount of Seroquel to fully benefit from its therapeutic effects. To understand how to use it here are some recommended starting doses for different conditions;

  • For schizophrenia; it is typically recommended to start with a dosage of 25 mg twice a day and adjust it based on how the patient responds.
  • For disorder during manic episodes; The initial dosage is usually 50 mg twice a day but it can be adjusted cautiously.
  • As therapy for major depressive disorder; The starting dose is 50 mg taken once daily in the evening.

Remember that these are just general guidelines, and individual needs may vary. It's always best to consult with a healthcare professional, for advice.

Titration Schedule and Maximum Dosage

To ensure patients can tolerate the treatment and achieve therapeutic results, it is important to gradually adjust the dosage. Typically doctors start with increases of 25 50 mg taken twice a day until the desired therapeutic effect is observed. The maximum recommended dosage for schizophrenia and bipolar disorder is usually 800 mg, per day, although this may differ depending on individual patient characteristics.

Special Considerations Based on Patient Conditions

Administering Seroquel requires precision, particularly when dealing with specific patient conditions;

  • Renal Impairment; It is crucial to adjust the dosage for patients with impaired kidney function.
  •  Geriatric Population; Lower initial doses and gradual adjustments are recommended due to changes, in how the medication is processed in older individuals.
  • Pediatric Population; Dosing recommendations. It is important to closely monitor for any negative reactions.


Active Ingredient and its Concentration

Seroquel's pharmacological effectiveness lies in its component, quetiapine. This substance, present in strengths, gives the medication its unique therapeutic properties.

Inactive Ingredients and Their Purposes

The composition of Seroquel goes beyond its active ingredient. There are also components that, while not pharmacologically active, have important functions.

  • Povidone and Dibasic Dicalcium Phosphate act as binders keeping the tablet intact.
  • Microcrystalline Cellulose adds bulk. Gives the tablet its desired texture and volume.
  • Hydroxypropyl Methylcellulose and Polyethylene Glycol help maintain the tablet's integrity and aid in its dissolution.

Available Formulations (tablets, extended-release, etc.)

Seroquel's therapeutic application is incredibly versatile. This is reflected in the different forms it comes in. For instance, there are immediate-release tablets that are designed to dissolve and work rapidly. On the other hand, there are extended-release tablets that ensure a sustained release of the medication, leading to long-lasting therapeutic effects.

Common Side Effects

Frequently Reported Side Effects

Every medication has the possibility of causing reactions, and Seroquel is not an exception. The range of its side effects is extensive. Mainly consists of;

  • Physical; Feeling dizzy, drowsy, and experiencing dry mouth.
  • Metabolic; Gaining weight, having an appetite, and higher levels of blood glucose.
  • Cardiovascular: heartbeat and low blood pressure when standing up.

Management and Mitigation Strategies

Dealing with the challenges of side effects requires an approach;

  • Adjusting the dosage can help reduce the intensity of certain side effects.
  • Using medications can help counteract specific unwanted reactions.
  • Changing your diet and engaging in activity can help alleviate any disruptions to your metabolism.

When to Seek Medical Attention

Although most side effects are temporary, there are situations that require medical attention. These include experiencing dizziness or fainting which could indicate low blood pressure.

Uncontrolled movements in the face or tongue may suggest a condition called tardive dyskinesia. Additionally, if you develop a rash or have an allergic reaction, it could be a sign of hypersensitivity.

If any of these circumstances occur, it is crucial to stop taking the medication and seek urgent medical advice.


Common Drugs that Interact with Seroquel

While Seroquel is known for its effectiveness it's important to be mindful of potential interactions with other drugs. Vigilance is key when considering the following combinations;

1. Antihypertensives; Co-administration may enhance the effects, so caution should be exercised.

2. Anticholinergics; There is an increased risk of experiencing retention and constipation when using these medications alongside Seroquel.

3. Central Nervous System Depressants; Concurrent use of Seroquel and other CNS depressants can potentially intensify sedation effects so it's important to be cautious.

4. Levodopa and Dopamine Agonists; Seroquel has the potential to interfere with the effectiveness of these medications, which can complicate management strategies, for Parkinsons disease.

It is crucial to remain aware of these drug interactions in order to ensure optimal treatment outcomes.

Dietary and Lifestyle Interactions

Apart from the field of pharmaceuticals, there are also lifestyle factors that can affect how Seroquel works in our bodies. Let's take a look at a few examples;

1. Alcohol: Drinking alcohol can make you feel more tired and may affect your cognitive abilities when taking Seroquel.

2. Grapefruit Juice: Consuming grapefruit juice might have an impact on the levels of Seroquel in your bloodstream.

3. Caffeine: It's possible that caffeine could influence the effects of the medication.

These factors are worth considering when taking Seroquel as they could potentially affect how the drug behaves in your system.

Recommendations for Co-administration

When dealing with medications, it is crucial to be vigilant and strategic. Adjusting the dosage may be necessary, especially when combining drugs that have side effects.

One approach to minimize the risk of interactions is to stagger the administration of these interacting medications. Additionally, frequent monitoring of the therapy helps detect any effects promptly.


Potential Severe Side Effects and Rare Adverse Events

Although Seroquel has established itself in the field of psychopharmacology, it does come with some challenges.

One such challenge is Malignant Syndrome (NMS) which is a potentially life-threatening condition characterized by high body temperature, changes in mental state, and muscle stiffness.

  • Another issue to be aware of is Tardive Dyskinesia, which involves movements, particularly in the face and tongue. These movements can become permanent over time 
  • Additionally, there may be metabolic changes associated with Seroquel usage.
  • Some individuals may experience weight gain dyslipidemia (abnormal lipid levels), and hyperglycemia (high blood sugar).
  • Lastly, although rare cataracts can occur as a complication, from taking Seroquel.It is recommended to have eye examinations to monitor for this potential side effect.

Symptoms of a Serious Allergic Reaction

Adverse reactions to Seroquel, although uncommon, may present with severity. These can include hives or skin rashes, swelling of the face, lips, tongue, or throat, difficulty, in breathing or shortness of breath, and anaphylaxis which is a severe and potentially life-threatening systemic reaction.

Situations in Which Immediate Medical Attention is Needed

In medical situations, it is necessary to provide immediate medical treatment. These include cases where there are muscle spasms, especially in the neck or eyes.

Additionally, if a person experiences a rash or skin reactions resembling Stevens-Johnson syndrome, urgent intervention is required.

Other indications for medical attention include persistent nausea, vomiting, or jaundice, which may signify liver damage as well as sudden changes in vision or eye pain.


Conditions in Which Seroquel Shouldn't be Prescribed

There are some conditions that prevent the use of Seroquel, If you have a known sensitivity or allergy to quetiapine or any of its components. Suppose you are taking medications known to prolong the QT interval, which increases the risk of heart rhythm abnormalities. Suppose you have a history of Neuroleptic Malignant Syndrome (NMS) from the use of antipsychotic medications.

Drug Conflicts that Contraindicate Use

Certain medications can potentially affect the use of Seroquel. For example, powerful inhibitors of CYP3A4 like itraconazole or ketoconazole can significantly increase the levels of quetiapine in the body. On the hand, inducers of CYP3A4 such, as rifampin or phenytoin, may cause Seroquel to be less effective.

Careful Administration

Close Monitoring Scenarios

Administering Seroquel in situations requires careful attention and monitoring. This includes patients who have a history of seizures or epilepsy, individuals who are prone to dehydration or heat exposure, and patients with cardiovascular conditions, especially arrhythmias or heart failure.

Adjustments for Patients with Liver or Kidney Issues

Careful adjustment of dosage is required due to the complexities of liver and kidney function. Individuals with liver function should start with a cautious dose and increase it gradually as needed.

Regular evaluations and adjustments may be necessary for individuals with compromised kidney function to prevent the build-up of substances.

Important Precautions

When starting Seroquel treatment, it is important to follow a strict health monitoring routine to ensure safety and effectiveness.

  • Regular lipid profile tests are essential for identifying any abnormalities in lipid levels.
  • Periodic glucose measurements can help prevent episodes or detect hidden hyperglycemia before it becomes symptomatic.
  • Additionally conducting assessments allows for early detection of movement disorders or other neurological abnormalities.

Considerations for Discontinuation or Switching Medications

When transitioning away from Seroquel whether by reducing the dosage or changing medications it is important to carefully plan and coordinate the process.

By tapering off the dosage, withdrawal symptoms and rebound psychosis can be minimized.

If any new symptoms arise after switching medications it is crucial to inform healthcare professionals.

In some cases, a washout period may be necessary when transitioning to different medications in order to prevent any negative interactions.

Avoiding Alcohol or Other CNS Depressants

When taking Seroquel alongside substances that affect the central nervous system (CNS), it's important to be cautious. Drinking alcohol while using Seroquel can increase its effects, which can potentially impair cognitive and motor functions.

Similarly, combining Seroquel with opioids or benzodiazepines can heighten the risk of depression. Patients should be informed about these risks. Advised to avoid alcohol or reduce their consumption of other CNS depressants.

Administration to Elderly

Dosage Adjustments

Elderly individuals in their seventies and eighties are more prone to experiencing changes in their bodies when taking medications.

To avoid any side effects, it is advisable to start with a lower dosage when beginning treatment. If necessary, adjusting the dosage should be done promptly and cautiously.

It becomes more crucial to regularly monitor for any potential side effects as they are more vulnerable due to their age.

Special Concerns and Potential Side Effects in the Elderly

The elderly population has a set of vulnerabilities. They are more prone to experiencing hypotension, which can lead to falls and injuries. Cognitive decline in individuals with Alzheimer's or other forms of dementia may worsen. Additionally, they may be more sensitive to the side effects of medications such as urinary retention and constipation.

Administration to Pregnant Women and Nursing Mothers

Known Risks and Potential Birth Defects

The physiology of pregnancy is complex. The use of Seroquel during the first trimester may lead to potential complications. While some studies suggest a connection between Seroquel exposure in early pregnancy and birth defects, more conclusive evidence is still emerging. It has also been noted that newborns may experience withdrawal symptoms, including restlessness and respiratory problems after birth.

Recommendations and Alternatives for Treatment

During pregnancy, it is crucial to make clinical decisions due, to the high stakes involved. If a woman is taking Seroquel and discovers she is pregnant, it is essential to consult with an obstetrician in order to assess the potential risks and benefits. It may also be worth considering treatments that have a lower risk of causing harm to the fetus.

Seroquel Presence in Breastmilk

After giving birth, it's important to consider whether or not to breastfeed while taking Seroquel. Quetiapine, the ingredient in Seroquel, can be passed on to the baby through breast milk.

It's crucial for nursing mothers to be aware of risks, such as sedation or developmental issues, for the infant. Before deciding whether to breastfeed, a thorough analysis should be done, weighing the risks and benefits involved.

Administration to Children

Age-appropriate Dosing and Adjustments

When it comes to treating children who have physiological changes as they grow, it's important to tailor the approach accordingly. The dosages should be adjusted based on their weight and age. It's usually wise to start with doses and then carefully increase them as needed.

Clinical Studies on Pediatric Use

In the field of demographics clinical studies have provided insights into certain details; Seroquel has been examined for its effectiveness in treating schizophrenia and bipolar disorder among adolescents.

Although it has shown results, there have been some differences in how it affects pediatric patients compared to adults. Specifically, there is an increase in weight and changes in metabolic functions.

Bipolar disorder

Bipolar Disorder

Safety Profile for Pediatric Patients

Ensuring the safety of children is important. It is crucial to monitor any metabolic changes, such as alterations in lipids and glucose regulation.

Regular assessments for movement disorders can help prevent term neurological complications.

Since this age group is particularly vulnerable, it is essential that caregivers are well-informed about side effects and the necessary interventions.


Symptoms of Seroquel Overdose

Consuming quantities of Seroquel can lead to various clinical signs that need to be identified early for prompt intervention. These indicators include;

1. Sedation: A sense of tiredness that often remains unaffected by external stimuli.

2. Tachycardia: An accelerated heart rate.

3. Acute Anticholinergic Effects: Symptoms such as dilated pupils (mydriasis), blurred vision, and difficulty urinating.

4. Orthostatic Hypotension: A drop in blood pressure when standing up. It is crucial to recognize these warning signs to take action promptly.

When dealing with the possibility of a Seroquel overdose, acting quickly is crucial as it can save lives.

It's important to contact emergency services without any delay. If you are near the person, make sure they are lying on their side to protect their airway.

Depending on how long it has been since they took the medication, they may need to be hospitalized away for procedures like gastric lavage or administering activated charcoal.

Long-term Implications and Management

Overdosing can be extremely dangerous. Have lasting effects. To navigate the aftermath of an overdose effectively it's important to have a plan in place;

1. Ongoing monitoring of the heart to prevent any irregularities.

2. A thorough evaluation by a psychiatrist to understand the reasons behind the overdose and create a plan to prevent it from happening

3. Regular check-ins, with healthcare providers to ensure there are no lingering or delayed complications.

It's crucial to take these steps in order to minimize the risks associated with overdosing and promote long-term well-being.


To maintain the integrity of Seroquel, it is important to follow guidelines for storing the medication. Store it at room temperature, between 15°C and 25°C.

Keep it away from sunlight and moisture, as they can affect its effectiveness. It is advisable to store Seroquel in its container to protect it from any external impurities.

Shelf Life and Expiration Considerations

Like other medications, Seroquel has a specific shelf life; The expiration date mentioned on the packaging should be considered as the sacred indicator of its usability.

When medication expires, it can lose its effectiveness. May even transform into potentially harmful substances. It is wise to check your medicine cabinet and remove any expired medications.

Disposal of Expired or Unused Medication

It is important to have a plan for getting rid of medication in order to protect the environment and prevent any potential misuse. Medication should never be disposed of by flushing it down toilets or pouring it into drains unless there are instructions to do so.

To ensure disposal, you can reach out to local pharmacies or law enforcement agencies for guidance. They can provide information on disposal methods, including designated programs for taking back unused medication.

When throwing away medication in the trash, it is wise to mix it with something, like used coffee grounds. This helps discourage any misuse.

Handling Precautions

Safe Handling and Transportation

When it comes to moving Seroquel from one place to another, whether it's between pharmacies or even across continents, it's crucial to handle it properly. When you're traveling, make sure to keep Seroquel in a dry place, like your carry-on bag to prevent any temperature changes.

Avoid leaving the medication inside parked vehicles where temperatures can rise rapidly. If you're crossing international borders, it's a good idea to have a copy of your prescription with you to avoid any potential legal issues that may arise.

Instructions for Missed Doses

In the chaos of daily life, it's not unusual to forget to take a dose of medication. However, it's important to handle the situation If you realize you missed a dose soon after take it as soon as possible. If it's close, to the time you're supposed to take your next dose it's better to skip the missed one to avoid accidentally taking too much. After that just continue with your dosing schedule without making any changes.

Precautions to Prevent Misuse or Abuse

Given the mind-altering effects of Seroquel, it is crucial to be vigilant about preventing misuse. Store the medication in places where it cannot be accessed by individuals, or children, who do not have a prescription for it.

Regularly checking the amount of medication can give indications if any unexpected reductions occur. Sharing or distributing Seroquel without a prescription is not just, against the law but can also put the health of the recipient at risk.

Rated: 5.0 / 5 based on 5.0 customer reviews.

Posted by KNOBLOCH on Dec 19, 2017 Verified Purchase

Everything went great

Not sure why there are fake negative reviews. I found no problems with the ordering process and have received all my orders quicker than expected. Based upon my experience this is the best online pharmacy on earth.

Note: does not imply any medical claims from this review.

Customers also bought

Popular Products

Similar Product