Asenapine (Saphris) for schizophrenia

Published in Medicine Update

Date published: About this date

Health and medicines information in this article may have changed since the date published. This information does not replace advice from a health professional.

This Medicine Update is for people with schizophrenia who are taking, or thinking about taking, asenapine.


Asenapine is an antipsychotic medicine. It is used to treat schizophrenia and bipolar I disorder. This Medicine Update is about using asenapine to treat schizophrenia.

Asenapine must be taken correctly to be effective. It comes in the form of a wafer that is placed under the tongue and allowed to dissolve. Asenapine will not work if the wafer is swallowed or chewed, or if you have anything to eat or drink for 10 minutes after taking it. It is taken twice a day.

The wafers look like small round tablets and are fragile, so need to be handled carefully. Most people will experience a numbing or tingling effect on the tongue and mouth that may last for up to an hour after taking asenapine.

Most of the other side effects of asenapine are similar to other antipsychotic medicines. Asenapine can cause weight gain, but not as much as some other antipsychotics.

Asenapine is a new medicine and there is limited information about long-term benefits or rare side effects. From the existing evidence, it appears to be about as effective as other antipsychotics, but it is hard to predict how well it will work for a particular person.


What asenapine is

The active ingredient of this medicine is asenapine (pronounced a-SEN-a-peen).

It is also known by the brand name Saphris.

What asenapine is for

Asenapine is used to treat schizophrenia.

Schizophrenia is a type of mental illness that affects the normal functioning of the brain.

People with schizophrenia can experience psychotic symptoms such as hallucinations, delusions and out of control thoughts. During these episodes they may not be able to distinguish what is and isn't real.

Asenapine can also be used to treat bipolar I disorder. This Medicine Update is about using asenapine to treat schizophrenia. A separate Medicine Update is available for asenapine for bipolar I disorder.

Who can take asenapine

You can be prescribed asenapine through the Pharmaceutical Benefits Scheme (PBS) if you have been diagnosed with schizophrenia and are over 18 years of age.

How to take asenapine

Asenapine comes in the form of a wafer that looks like a small round tablet. These wafers are very delicate and need to be handled carefully or they will disintegrate.

Asenapine must be placed under the tongue until it dissolves. It is really important that you take it correctly or it will not work. Do not swallow or chew the wafer, and don't eat or drink anything for 10 minutes after taking it.

There are two different strengths of asenapine — 5 mg or 10 mg. It is usually taken as a single wafer twice a day — one in the morning and one in the evening.

Steps for taking asenapine

  1. Do not remove the wafer from the blister pack until you're ready to take it.
  2. Make sure your hands are dry before handling the wafer.
  3. Peel back the coloured tab on the blister. Do not cut or tear the blister or push the wafer through it.
  4. Gently remove the wafer from the blister, being careful not to crush it.
  5. Place the wafer under your tongue and allow it to completely dissolve (remember not to chew or swallow the wafer).
  6. Do not eat or drink for 10 minutes after taking the wafer.

Note: It is quite normal for asenapine to make your tongue and mouth feel numb or tingle for up to an hour after each dose.

What if I forget to take asenapine?

If you forget a dose, take it as soon as you remember and then go back to taking the next dose as you would normally. If it's already almost time for your next dose, just take a single dose.

Never take a double dose to make up for the one you missed.

What if I swallow asenapine?

If you accidentally swallow a wafer, take the next dose when you're meant to. Do not take a second dose.

How long will I need to take asenapine for?

Asenapine is a long-term treatment that you will need to take every day as directed to help control your schizophrenia. Even if you're feeling better, do not stop taking it without talking to your doctor or other health professional.

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What does asenapine do?

Asenapine is a type of medicine called an antipsychotic. It's one of the newer antipsychotics sometimes referred to as 'atypical' antipsychotics.

Antipsychotic medicines work on chemicals in the brain called neurotransmitters. Changes in the levels of these neurotransmitters are related to manic behaviour and psychotic symptoms.

Antipsychotic medicines have a powerful calming effect and help reduce psychotic symptoms like hallucinations, delusions and out of control thoughts.

Will asenapine work for me?

It's hard to predict which antipsychotic medicine will be best for a particular person.

If asenapine doesn't work for you, your doctor may change the dose or switch you to a different medicine.

How long does asenapine take to work?

You should begin to feel better within a few weeks of starting to take asenapine. However, it can take several months before you feel the full benefits.

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Important side effects to consider

For a more complete list of possible side effects for Saphris (asenapine), see the consumer medicine information (CMI) available on our Medicines search page.

It's very common for your tongue and mouth to tingle or feel numb for up to an hour after each dose of asenapine.

Most people will get side effects from antipsychotics

Asenapine has similar side effects to other antipsychotics. Most of the time these are not serious and they may improve over time.

Some common side effects of asenapine are:

Ask your health professional about the possible side effects of this medicine before you take it. Always tell them about any changes to your condition if you're taking a new medicine.

To report possible side effects call the NPS Adverse Medicine Events (AME) Line on 1300 134 237.

People with questions about their medicines or seeking general information about side effects can call NPS Medicines Line on 1300 633 424.

Both these services are available Monday to Friday, 9am to 5pm AEST.

  • sleepiness or fatigue (very common)
  • dizziness
  • drowsiness
  • restlessness, agitation, anxiety, excitement or difficulty concentrating
  • shaking, twitching or rigid muscles
  • increased appetite or weight gain.

Tell your health professional if you feel unwell, even if you are not sure that it's asenapine that makes you feel this way. They may have some advice to help you manage the side effects, or could decide to adjust your dose or use a different medicine.

Do not stop taking asenapine without talking to your health professional. Your schizophrenia symptoms can get worse unless you take your medicine as recommended.

Serious side effects you should know about

Asenapine can also cause serious side effects, although these are uncommon or rare. If you have any of the following problems, tell your health professional immediately or go to Accident and Emergency at your nearest hospital:

  • uncontrollable movements of the tongue, face, mouth or jaw
  • extremely high body temperature
  • stiff muscles, fast breathing, abnormal sweating or decreased mental alertness
  • sudden signs of allergy such as skin rash, itching or hives, swelling of the face, lips, tongue or difficulty breathing.

How to reduce your risk of side effects

Do not take any other medicines that may cause drowsiness (for example, sleeping pills) unless recommended by a health professional who knows that you are taking asenapine.

Be careful when drinking alcohol, or avoid it altogether, particularly if your health professional has advised you to avoid alcohol. Combining asenapine and alcohol can make you sleepy or dizzy.

To avoid dizziness or fainting caused by a temporary drop in blood pressure, stand up slowly, especially when you get up from a chair or bed.

Dizziness may become less of a problem after you've been taking asenapine for a few weeks, but if it continues or gets worse, talk to your health professional.

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What else you should know about asenapine

If you're taking asenapine, you should talk to your health professional before taking any other medicines, including any bought without a prescription from a pharmacy, supermarket or health food store.

Interactions with other medicines

Medicines that can have an interaction with asenapine include:

Use a medicines list to help keep track of the medicines you are taking. Take it with you each time you visit a health professional, or if you go into hospital.

Get your NPS Medicines List or download the free iPhone app.

  • certain antidepressants, including fluvoxamine (e.g. Luvox) and paroxetine (e.g. Aropax)
  • blood pressure lowering medicines.

Tell your doctor about any other medicines you're already taking before starting to take asenapine.

Avoid driving or other hazardous activities

Asenapine may make you feel dizzy or drowsy. If it makes you feel this way you should avoid driving, operating machinery or other activities that you need to be alert for.

Asenapine may not be suitable for everyone

Asenapine is not approved for the treatment of people with dementia-related psychosis.

Asenapine may not be suitable if you're pregnant, about to become pregnant or breastfeeding. Your doctor will take this into consideration before prescribing asenapine.

Diabetes is more common in people with schizophrenia. If you have diabetes or risk factors for diabetes, your blood glucose level should be tested before you start taking asenapine and monitored throughout treatment.

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Other medicines available for schizophrenia

Talk with your doctor or other health professional about all of the treatment options for schizophrenia. Ask your doctor or other health professional to explain why an antipsychotic is needed, what the benefits are likely to be for you or the person in your care, and how you'll be able to tell whether it's working.

There are two main types of medicines used to treat schizophrenia — older or 'typical' antipsychotics and the newer or 'atypical' antipsychotics. There are some differences in side effects between the two different types.

Each antipsychotic medicine works slightly differently.

Older antipsychotics

These older antipsychotic medicines have been used for many years and are known to be effective. However, they often cause long-term side effects like uncontrollable movements, and so are not usually the first choice of medicine for schizophrenia.

Active ingredient Brand names
haloperidolHaldol Decanoate, Serenace

Newer antipsychotics

The newer antipsychotics generally work just as well as the older medicines, but are less likely to cause side effects relating to movement problems. However other side effects, such as weight gain or diabetes, are more likely.

You will normally only take one antipsychotic medicine at a time. But there may be times when your doctor might prescribe more than one. For example, during an acute psychotic episode to help reduce agitation, anxiety or disturbed behaviour, or when you're switching from one antipsychotic medicine to another.

Active ingredientBrand names
amisulprideAmipride, Solian, Sulprix
clozapineClopine, Clozaril
risperidoneOzidal, Resdone, Rispa, Risperdal, Rixadone

Medicines other than antipsychotics

Depression and anxiety often affect people with schizophrenia. These may improve as a result of treating the psychotic symptoms, but if they don't, you may need to take another medicine such as an antidepressant or benzodiazepine (e.g. diazepam) for a short time.

Non-medicine treatments

Counselling and community support while taking an antipsychotic are helpful for many people.

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How to decide between asenapine and other medicines

Your doctor will help you weigh up the benefits and side effects of asenapine and other antipsychotic medicines. From the existing evidence, asenapine appears to be about as effective as other antipsychotics, but it's hard to predict how well it will work for a particular person.

Remember that benefits andside effectsdiffer between medicines and from person to person.

The choice of antipsychotic will be guided by your condition, other medicines you're taking and your risk of side effects, as well as considerations such as convenience and your personal preference. You may need to try various options before you work out with your doctor what is best for you.

For some people, weight gain may be less of a problem with asenapine compared with other antipsychotics. But it can still occur.

Weight gain can also be caused by your lifestyle and other medicines, including antidepressants and mood stabilisers such as lithium.

Because the wafer dissolves under your tongue, asenapine may be convenient if you have problems swallowing tablets or liquids. However, some people may find it difficult to use asenapine wafers correctly. Discuss other options, such as regular injections, with your health professional if you have difficulty taking tablets, liquids or wafers correctly.

Asenapine is a new medicine. Information on its benefits and possible side effects is still limited, as it has not been studied in a continuous trial for longer than 12 months. The benefits and side effects of asenapine have been compared with only a few other antipsychotics.

Clozapine (e.g. Clozaril) is known to be more effective than the other antipsychotics. However, it can cause serious side effects and is generally only used when other antipsychotics don't work or aren't suitable.

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What does asenapine cost?

Most medicines prescribed by a health professional are covered by the Pharmaceutical Benefits Scheme (PBS). This means that the Australian Government pays part of the cost of your medicine. For more information see

Cost to the Government

The full cost of asenapine to the Australian Government is:

  • $157.07 for 5mg sublingual wafers (60 in pack)
  • $252.72 for 10mg sublingual wafers (60 in pack).

Each prescription is for a 30-day supply of asenapine.

Cost to the individual

If you get asenapine through the PBS, the Australian Government pays most of the cost and you'll pay only a part, called the co-payment.

At the time of publication, people who are entitled to get asenapine through the PBS will pay:

  • $34.20 without a concession card
  • $5.60 with a concession card.

If you're not eligible to get asenapine through the PBS, you'll need to pay the full price for a prescription.

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Additional ways to help manage your schizophrenia

As with other mental health conditions, treatment of schizophrenia can include non-medicine treatments such as counselling and community support programs. Along with antipsychotic medicines, these can play an important role in helping you manage your condition.

Try to live a healthy lifestyle

Studies have shown that regular physical exercise can have a positive effect on mental health. It can also lessen some of the side effects of antipsychotic medicines and this means you'll be more likely to continue taking your medicines as prescribed.

A common side effect of antipsychotic medicines is weight gain. As well as making you feel less good about yourself, weight gain increases your risk of heart disease and diabetes. So, it's important to eat well and keep active.

There are various programs designed to help support people with mental illness and improve their physical health. Ask your health professional, or contact SANE Australia to find out about their Mind + Body initiative.

Many people with schizophrenia smoke. This causes several serious health problems, so quitting is an important step to taking control of your health. The Quitline (137 848) or a health professional can help you increase your chance of success and learn from any past quit attempts.

Psychological treatments may help with depression and anxiety

Psychological treatments, involving talking to a specially-trained health professional, can be an effective method of treating depression and anxiety. Several different types of psychological treatment have been found to be useful for people with schizophrenia, including cognitive behaviour therapy (CBT) and family support and education. Talk to your GP, psychiatrist or other mental health professional to find out more about whether you might benefit from this type of treatment in addition to taking medicines.

Resources for people with schizophrenia and their carers

SANE Australia is a national organisation working for a better life for people affected by mental illness. They have a range of information and resources available, including:

  • Fact Sheet Schizophrenia
  • Fact Sheet — Antipsychotic Medication
  • Mind + Body initiative promotes physical health and wellness with a range of resources available for individuals and non-government mental health organisations.

Contact the SANE Helpline 1800 18 7263 for help or more information.

Look after yourself if you're a carer

Caring for a person with a mental illness can be stressful and tiring. If you're a carer it's vital you look after yourself too, by taking breaks, continuing enjoyable activities, eating a healthy diet, exercising regularly and getting enough sleep. You'll be able to look after someone more effectively if you're in good health yourself.

ARAFMI (Association of Relatives And Friends of the Mentally Ill) is an organisation that focuses on providing support for families and carers of people with mental illness. Each state and territory has a service you can contact for information on counselling, mutual support groups, phone support, information and referral services for families. Contact them through Mental Health Carers Arafmi Australia.

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Where to find more information

You can find more information in the consumer medicine information (CMI) leaflet for Saphris (asenapine). This will tell you:

  • who should not take the medicine
  • which other medicines should be avoided
  • how to take the medicine
  • most of the possible side effects
  • the ingredients.

You can get the CMI leaflet for Saphris (asenapine) from:

Information over the phone

NPS works with healthdirect Australia to provide the Medicines Line phone service for consumers.

To get more information about any medicine call 1300 MEDICINE (1300 633 424). This service is available from anywhere in Australia, Monday to Friday, 9am to 5pm AEST excluding NSW public holidays.

To report a side effect

Call the NPS Adverse Medicine Events (AME) Line on 1300 134 237, Monday to Friday, 9am to 5pm AEST excluding public holidays.

The AME Line is a service where you can report possible side effects of your medicine and contribute to national medicine safety efforts. Information on medicine-related side effects is passed on to the Therapeutic Goods Administration (TGA) for assessment, but your personal details will remain confidential and your privacy maintained.


NPS acknowledges the contribution of SANE Australia in the production of this article.

NPS acknowledges the contribution of SANE Australia in the production of this Medicine Update article.

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