About this leaflet
This leaflet may be helpful if:
- you have been prescribed antipsychotic medication
- a friend or relative has been prescribed antipsychotic medication
- you just want to find out about antipsychotic medication
- What are antipsychotic medications?
- How are they supposed to help?
- How do they work?
- What kinds of antipsychotic medication are there?
- What are the possible side-effects?
- How long should it be taken for?
- How do I stop taking it?
- What alternatives are there?
What are antipsychotic medications?
They are a range of medications that are used
for some types of mental distress or disorder - mainly schizophrenia and
manic depression (bipolar
disorder). They can also be used to help severe
anxiety or depression.
What can they help with?
- The experience of hearing voices (hallucinations).
- Ideas that distress you and don't seem to be based in reality (delusions).
- Difficulty in thinking clearly (thought disorder).
- The extreme mood swings of manic depression/bipolar disorder.
- Some can help with severe depression.
How do they work?
They all affect the action of a number of
chemicals in the brain called
neurotransmitters – chemicals which brain cells need to
communicate with each other. Dopamine is the main neurotransmitter
affected by these medications. It is involved in how we feel:
- that something is significant, important or interesting;
- satisfied;
- motivated.
It is also involved in the control of muscle
movements.
If parts of the dopamine system become
overactive, they seem to play a part in producing hallucinations,
delusions and thought disorder.
Although these medications were known as
‘major tranquillisers’ in the past, they are not designed to make
you calmer or sleepy – so they are not the same as medications like
Valium or sleeping tablets.
The basic aim is to help you feel better,
without making you feel slowed down or drowsy. However, high doses
may well make you feel too sleepy or 'drugged up'. They can be used
in higher doses if you become very overactive, agitated or
distressed - but this should usually only be for a short time.
What kinds of antipsychotic medication are there?
For the past 10 years or so doctors have
talked about two different groups of antipsychotics:
- ‘Typical’ - the older drugs
- ‘Atypical’ - the newer drugs
Recent large independent research studies -
not paid for by the drug companies – suggest that the new drugs are
not really different – but are, in some situations, easier to
use.
Choosing an antipsychotic
Most antipsychotics seem to be equally as good
at controlling psychotic symptoms – Clozapine is the exception and
is described later. Even so, individuals react differently to them,
particularly with the side-effects. We cannot predict how well a
particular person will respond to a particular drug – even whether
a newer, or older drug, will be more helpful. It can often
take some time, negotiation and ‘trial and error’ to find the best
antipsychotic for a particular person.
Older antipsychotics: these
first appeared in the mid-1950s. These older drugs are often called
‘typical’ or 'first-generation' antipsychotics. They all block the
action of dopamine (see above), some more strongly than others.
Side-effects include:
- stiffness and shakiness, like Parkinson’s disease
- feeling sluggish and slow in your thinking
- uncomfortable restlessness (akathisia)
- some can affect your blood pressure and make you feel dizzy
- problems with your sex life
- problems with breast swelling or tenderness.
If you have any of these symptoms, you
are probably on too high a dose. It should usually be reduced until
the side-effects disappear. If you do need a higher dose to stay
well, these side-effects can be controlled with anticholinergic
drugs - used to treat Parkinson's disease. Orphenadrine and
Procyclidine are the two most commonly used anticholinergics in the
UK.
A longer-term problem is tardive dyskinesia
(TD for short) – continual movements of the mouth, tongue and
jaw. This affects about 1 in 20 people every year who are
taking these medications.
Some older, ‘typical’
antipsychotics.
Tablets
|
Trade
Name
|
Usual daily
dose (mg)
|
Max. daily dose
(mg)
|
---|---|---|---|
Chlorpromazine
|
Largactil
|
75-300
|
1000
|
Haloperidol
|
Haldol
|
3-15
|
30
|
Pimozide
|
Orap
|
4-20
|
20
|
Trifluoperazine
|
Stelazine
|
5-20
|
|
Sulpiride
|
Dolmatil
|
200-800
|
2400
|
Newer antipsychotics : over
the last 10 years, newer medications have appeared. They still
block dopamine, but much less so than the older drugs. They also
work on different chemical messengers in the brain (such as
serotonin) and are often called ‘atypical’ or ‘second-generation’
antipsychotics. This is misleading - they have many of the same
effects as the older drugs.
The newer antipsychotics are also being used to help treat some
people's depression. There is growing evidence that this can be
effective when combined with an antidepressant. Your psychiatrist
will talk to you if this is an option to consider.
Side-effects
- Sleepiness and slowness
- Weight gain
- Interference with your sex life
- Increased chance of developing diabetes.
- Some can affect your blood pressure and make you feel dizzy.
- In high doses, some have the same Parkinsonian side-effects as the older medications (stiffness of the limbs).
- Long-term use can produce movements of the face (tardive dyskinesia) and, rarely, of the arms or legs.
Compared to the older drugs they seem:
- less likely to cause Parkinsonian side-effects (see above)
- less likely to produce tardive dyskinesia.
- more likely to produce weight gain
- more likely to produce diabetes
- more likely to give you sexual problems.
They may also help 'negative symptoms' (poor
motivation, lack of interest, poor self-care), on which the older
drugs have very little effect. Some people find the side
effects less troublesome than those of the older medications.
Some of the newer ‘atypical’
antipsychotics.
Tablets
|
Trade
Name
|
Usual daily
dose (mg)
|
Max. daily dose
(mg)
|
---|---|---|---|
Amisulpride
|
Solian
|
50-800
|
1200
|
Aripiprazole
|
Abilify
|
10-30
|
30
|
Clozapine
|
Clozaril
|
200-450
|
900
|
Olanzapine
|
Zyprexa
|
10-20
|
20
|
Quetiapine
|
Seroquel
|
300-450
|
750
|
Risperidone
|
Risperdal
|
4-6
|
16
|
Clozapine: seems to be
the only antipsychotic medication which works better than any of
the others. It also seems to reduce suicidal feelings in people
with schizophrenia.
It has many of the same side-effects as other
newer antipsychotics, but can also make you produce more
saliva.
It is different in that it seems to have very
little, if any, effect on the dopamine systems which control
movement, and so causes hardly any of the stiffness, shakiness or
slowness that you can get with other antipsychotics. Although it
does tend to make you drowsy, some people are prepared to put up
with this because it makes them feel less sluggish than on the
older antipsychotics. It also does not seem to produce the
longer-term problem of tardive dyskinesia and can be used to help
relieve this.
Side-effects
The main drawback is that it can affect your
bone marrow, leading to a shortage of white cells. This makes you
vulnerable to infection. If this happens, the medication is stopped
at once so that the bone marrow can recover. So, if you take
Clozapine you will need weekly blood tests for the first 6 months
and 2 weekly blood tests after that. It can also cause weight
gain, constipation, over-production of saliva and make
epileptic fits more likely.
These problems mean that Clozapine is usually
only suggested after at least two other antipsychotics have been
tried. It is a difficult drug to monitor and can be difficult to
take, but some people find that overall it gives them a much
better quality of life.
‘Depot’ antipsychotics
The word ‘depot’ means that the medication is
given not as tablets, but as an injection every 2 to 4 weeks. It
releases the medication slowly over this time. The effects are
generally the same as medications taken by mouth.
What's good about having a depot
injection?
Unlike tablets, you only have to think about
it once in a while. As there is someone else to remind you, it can
be easier to remember to take than tablets.
What's bad about having depot
injections?
- Nobody likes having injections – even though the pain is slight and doesn't last long.
- It takes a long time to know the effect of changing the dose. If the dose is changed, you may not know what the effect of this change is for several weeks or months – it can take 4 injections or so for the change to work its way through.
- If a particular dose is giving you side-effects, lowering it may make little difference for several weeks.
How are the injections
given?
- A nurse will give you the injection. There is usually no-one else in the room - just you and the nurse.
- The first injection is usually a small dose of the medication to check that it does not give you any side-effects.
- If there are no problems then, a week or so later, you can start having regular injections at a higher dose.
- After each injection, the medicine will stay in your body for several weeks.
- The interval between injections is usually between 2 and 4 weeks
Where can you have the injections
done?
You can usually decide yourself where to have
the injections. This might be:
- at your local GPs' surgery
- at a community mental health centre
- at a special out-patient clinic
- at your home, when a nurse visits you.
Some common depot
antipsychotics.
Depot
injections
|
Trade
name
|
Normal 2-weekly dose
|
Usual
max.
|
Interval
|
---|---|---|---|---|
Haloperidol decanoate
|
Haldol
|
50
|
300
|
4 weeks
|
Flupenthixol decanoate
|
Depixol
|
40
|
400
|
2 weeks
|
Fluphenazine decanoate
|
Modecate
|
12.5
|
100
|
2 weeks
|
Pipothiazine palmitate
|
Piportil
|
50
|
200
|
4 weeks
|
Zuclopenthixol decanoate
|
Clopixol
|
200
|
600
|
2 weeks
|
Newer
|
Trade
name
|
Normal 2-weekly dose
|
Usual
max.
|
How
often
|
Risperidone
|
Risperdal Consta
|
25
|
50
|
2 weeks
|
There is work in progress to make new depot
medications from the second generation antipsychotics and these may
be available soon.
How well does medication work?
- About 4 in 5 people get help from them. They control the symptoms, but do not get rid of them. You have to go on taking the medication to stop the symptoms from coming back.
- Even if the medication helps, the symptoms may come back. This is much less likely to happen if you carry on taking medication, even when you feel well.
How long should I take an antipsychotic for?
This depends on a number of factors.
Schizophrenia
If you have had just one episode of
schizophrenia, you have roughly 1 in 4 chance that your
symptoms will not return after you get better. So you may well not
need to carry on taking an antipsychotic.
For most people with schizophrenia, the
symptoms will continue or come and go over the years. Some things
to consider are:
- You may find that antipsychotic medication takes your symptoms away completely. It's more likely that they will just make the symptoms less intense and easier to cope with.
- As with any medication, you have to balance the help you get from it, against any side-effects it gives you.
- For many people the symptoms seem to come and go for no obvious reason – so there may be times when it is more helpful to take such medication, and times when you don't need it so much.
- If you have had more than one period of psychotic symptoms and stop the medication, the symptoms will usually return within 6 months.
- There is evidence that if major long-term problems are going to develop they do so in the first 5 years or thereabouts. So your doctor may feel that it is important to use medication to try and keep you well through these early years.
Bipolar disorder
Bipolar disorders will almost always return
although, during the first episode, it is hard to predict how often
this will happen.
What happens if I stop antipsychotic medication?
The symptoms will usually come back - not
immediately, but usually within 3 – 6 months.
How do I stop taking it?
If you decide you want to stop taking an
antipsychotic, talk it over with your psychiatrist. You and the
psychiatrist may disagree about this, but there is a way that can
help both sides to feel happier. You can:
- make a list of feelings/thoughts/behaviours that might warn you that your symptoms are returning. The pattern of symptoms is often very similar from one episode to another.
- make a similar list – with someone you trust and who knows you well - of what other people might notice if your symptoms start to return.
This means that your symptoms are not likely
to suddenly return. If they do start to get worse again, you can
think about what to do next while you are still well.
If you do stop medication completely, keep in touch with your
psychiatrist or mental health worker, even if you have been well
for a few months without medication.What alternatives are there?
The evidence is very clear that nothing else
works as well as antipsychotic medications in the treatment of the
more troublesome symptoms of psychotic illnesses. For many
people, antipsychotics alone are not enough to get them back to a
full and active life. Other ways of helping will usually be added
to antipsychotic treatment rather than replacing it. These
include:
- Psychoeducation
- Family therapy
- to reduce tensions between the person with a psychiatric illness and those who care for them;
- to give the family practical ways of coping with everyday problems.
- Hearing voices groups
People who have
similar experiences of hearing voices get together to discuss their
experiences and how they cope with them.
Not all of these are available in all areas,
and they may not be helpful for everybody – if you feel that one of
these might be helpful for you, talk it over with your psychiatrist
or mental health worker.
Which antipsychotic is right for me?
There are no antipsychotics that are clearly 'better' than any others. Clozapine is more effective, but has potentially dangerous side-effects and means that you have to have regular blood tests.NICE guidelines (England and Wales) suggest that one of the newer antipsychotics should be tried first and then one of the older ones, depending on how well the medication works for you, and any side-effects they give you.
The best thing is to weigh up the benefits and risks of the different medications with your psychiatrist. Write down the things you are worried about before the appointment so that you don't forget anything important.
For a full list of side effects please visit emc.medicines.org.uk and type in the name of the medicine in the 'Search for:' section at the top of the page.
Further help
Mindinfoline: 0845 766 0163.
Mind provides information and advice, training programmes,
Mind in your area, grants and more.
National Schizophrenia
Fellowship (Scotland): works to
improve the wellbeing and quality of life of those affected by
schizophrenia and other mental illness, including families and
carers.
Rethink: National
voluntary organisation that helps people with any severe mental
illness, their families and carers.
Shine: supporting people with
mental ill health
Saneline: Helpline: 0845 767
8000. A national mental health helpline offering emotional support
and practical information for people with mental illness, families,
carers and professionals.
References
- British National Formulary (March 2009). The BNF provides UK healthcare professionals with authoritative and practical information on the selection and clinical use of medicines in a clear, concise and accessible manner.
- CG 82: Schizophrenia (update): core interventions in the treatment and management of schizophrenia in primary and secondary care. NICE guidelines, 2009.
- Schizophrenia: atypical antipsychotics: the clinical effectiveness and cost effectiveness of newer atypical antipsychotic drugs in schizophrenia: NICE guidelines, 2002.
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