Quetiapine (Seroquel)

What quetiapine is

Quetiapine is a medication sold under the brand name Seroquel. It works on dopamine and serotonin, two of the chemical messengers nerve cells use to communicate, and it has a calming effect. It comes as a regular tablet and as an extended-release tablet that is taken once a day.

What it treats

Your clinician might suggest quetiapine for one of these, among other possible off-label uses:

• Schizophrenia
• Bipolar disorder, for manic or depressed episodes and to help keep things steady over time
• Depression, often added to another depression medication when it has not done enough on its own
• Trouble with sleep or anxiety, where low doses are sometimes used off-label

Whether it is a good fit for you depends on several factors, including your history and what you are working on. As with everything in psychiatry, that is decided case by case.

How it works

Honestly, no one knows with complete certainty how quetiapine produces its benefit. What robust research supports is that it works by steadying the activity of dopamine and serotonin, messengers involved in mood, thinking, and how the brain filters experience. Its calming effect, which is part of why low doses are sometimes used for sleep, comes from the way it acts on other signals in the body. The biology is only part of the picture: how much a medication helps, and how it feels, is individual. Two people on the same medication can have very different experiences.

How to take it

There is no single right way to take quetiapine; it depends on you and your clinician. The regular tablet may be taken once or more a day with or without food, while the extended-release tablet is usually taken once a day, often in the evening; the extended-release kind is swallowed whole, not split or crushed. The plan you and your clinician make together is the one to follow, not a number you read online. A few general points apply broadly:

• Take it the way you and your clinician agreed. Because it can make you drowsy, be careful with driving or anything that needs full attention until you know how it affects you.
• If you miss a dose, ask your clinician or pharmacist what to do rather than doubling up.
• Try not to stop on your own. Your clinician can lower it gradually if and when that makes sense.
• Because medicines in this group can affect weight, blood sugar, and cholesterol over time, your clinician may check these now and then. This is routine monitoring, not a sign that something is wrong.

What to expect

This varies from person to person. The calming effect may be noticeable fairly soon, while any lift in mood or steadying of other symptoms usually takes longer, commonly a few weeks and sometimes more. Some people feel groggy or lightheaded early on, and that tends to ease as the body adjusts. If nothing has shifted after a fair trial, that is useful information, not a dead end, and there are other options. As always, this is case by case.

Side effects

Not everyone gets side effects, and many that do happen ease over the first weeks. The lists below are possibilities, not certainties.

Possible more common side effects:

• Feeling drowsy, tired, or calm, especially early on
• Dizziness or feeling lightheaded when standing up, so it helps to rise slowly
• Dry mouth
• Constipation or an upset stomach
• Increased appetite and weight gain
• A stuffy nose

If any of these stick around or bother you, they are worth raising. Send a non-urgent message through the patient portal or bring it up at your next visit; often a small change helps.

Less common, but concerning side effects that could require emergency care:

• Signs of an allergic reaction: rash, hives, or swelling of the face, lips, tongue, or throat, or trouble breathing or swallowing
• A high fever with stiff muscles, confusion, heavy sweating, and a fast or irregular heartbeat, which can be a serious reaction that needs prompt care
• Uncontrollable or unusual movements of the face, mouth, tongue, arms, or legs
• A seizure
• A painful erection, or one that lasts more than a few hours, which needs prompt care
• Signs of an infection, such as fever, sore throat, or chills
• Signs of very high blood sugar, such as being very thirsty, urinating often, or feeling confused or unusually drowsy
• Any new or worsening thoughts of harming yourself

For any of these, use the help options at the top of this page: call 911 or go to the nearest emergency department for a medical emergency or severe reaction, or call or text 988 for a mental health crisis.

When to reach out, and where

For routine questions, side effects that can wait, or how things are going, send your clinician a message through the patient portal. These are part of your ongoing care and are answered in the normal course of a few business days, so they are best for things that are not urgent.

If something feels urgent, you do not need to wait for a reply. The help options at the top of this page are the fastest way to get care: 911 or the nearest emergency department for a medical emergency or severe reaction, or 988 any time for a mental health crisis or thoughts of self-harm.

Questions to ask your clinician

• What are you hoping quetiapine will help with in my case?
• How and when will we know if it is working?
• If it is for sleep, how long do you expect I will use it?
• What should I do if I notice side effects?
• What is the plan if this one turns out not to be the right fit?
• How will we handle stopping it, if and when we get there?