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The product code(s) for this leaflet is: PL00427/0227.
Perizam 1mg/ml Oral Suspension
Perizam® 1mg/ml Oral Suspension
Clobazam
1. What Perizam Oral Suspension is and what it is used for
2. What you need to know before you take Perizam Oral Suspension
3. How to take Perizam Oral Suspension
4. Possible side effects
5. How to store Perizam Oral Suspension
6. Contents of the pack and other information
The full name of your medicine is Perizam 1mg/ml Oral Suspension. In this leaflet the shorter name Perizam is used. It contains the active ingredient Clobazam.
This medicine has been prescribed for you for either:
It contains Clobazam which belongs to a class of medicines called benzodiazepines
This medicine has been prescribed to you and should not be given to anyone else.
Benzodiazepines can cause dependence, tolerance and addiction, and you may get withdrawal symptoms if you stop taking it or reduce the dose suddenly. Your prescriber should have explained how long you will be taking it for and, when it is appropriate to stop, how to do this safely. When your treatment is stopped, it is usually done gradually over a period which is specific to you and may occur over a period of weeks to months. If this medicine is being used for the treatment of epilepsy you must continue to take it as prescribed by your doctor.
Do not take this medicine if any of the above apply to you. If you are not sure, talk to your doctor or pharmacist before taking Perizam.
Note: Make sure that you receive the same clobazam medicine every time you collect your prescription unless your doctor has agreed to change to a different clobazam medicine. If the appearance of this medicine is not the same as usual or if the dosage instructions have changed, speak to your doctor or pharmacist as soon as possible to make sure you have the right medicine.
There have been very rare reports of potentially life-threatening skin rashes (Stevens-Johnson Syndrome, Toxic Epidermal Necrolysis) with the use of Perizam. Symptoms of which may include: flu-like symptoms followed by a painful red or purplish rash that spreads and blisters. If you develop any of the above you must stop taking this medicine and inform your doctor straight away (see Section 4).
Talk to your doctor or pharmacist before taking Perizam if:
Taking this medicine regularly, particularly for a long time, can lead to physical dependence and addiction. Your prescriber should have explained how long you will be taking it for and, when it is appropriate to stop, how to do this safely. When your treatment is stopped, it is usually done gradually over a period which is specific to you and may occur over a period of weeks to months.
Drowsiness, difficulties breathing, coma and death may occur if Perizam is taken together with opioids. Perizam and opioids should only be used concomitantly, when other treatment options are inadequate. Please tell your doctor about all opioid medicines you are taking and follow your doctor’s dosage recommendations closely.
If any of the above apply to you (or you are not sure), talk to your doctor or pharmacist before taking Perizam.
Some studies have shown an increased risk of suicidal ideation, suicide attempt and suicide in patients taking certain sedatives and hypnotics, including this medicine. However, it has not been established whether this is caused by the medicine or if there may be other reasons. If you have suicidal thoughts, contact your doctor as soon as possible for further medical advice (see section 4).
If you are not sure if any of the above apply to you, talk to your doctor or pharmacist before taking Perizam
You may become dependent on Perizam if you take it for a long period of time, especially if you regularly drink a lot of alcohol or use drugs. This means that you may feel that you need to continue the treatment with Perizam in order to feel well (‘psychological dependence’).
Physical dependence and addiction can cause withdrawal symptoms when you stop taking this medicine. Withdrawal symptoms can include:
If you take Perizam for epilepsy for a long period of time then it is possible that you may become ‘tolerant’ to it. This means that it will not work as well as it did when you first started taking it. Talk to your doctor if you feel that Perizam is no longer helping to control your symptoms - they may suggest that you take a short break from this medicine.
Benzodiazepines should only be used by those they are prescribed for. Do not give your medicine to anyone else. Taking higher doses or more frequent doses of benzodiazepines may increase the risk of addiction. Overuse and misuse can lead to overdose and/or death.
Epilepsy (fits): Perizam should only be taken by children under 2 years if the doctor decides this is necessary.
Tell your doctor or pharmacist if you are taking, have recently taken or might take any other medicines. This includes medicines obtained without a prescription and herbal medicines. This is because Perizam can affect the way some other medicines work.
Also, some other medicines can affect the way Perizam works.
In particular tell your doctor or pharmacist if you are taking any of the following:
When taking Perizam you should not start taking any different medicines containing clobazam unless your doctor tells you to. If you do, it may cause breathing difficulties and sleepiness.
Concomitant use of Perizam and opioids increases the risk of drowsiness, difficulties breathing, coma and death. Because of this, concomitant use should only be considered when other treatment options are not possible.
If you are not sure if any of the above apply to you talk to your doctor or pharmacist.
If you are going to have an operation or dental work, tell your doctor or dentist that you are taking Perizam. This is because they may need to change the amount of medicine (anaesthetic or muscle relaxant) they give to you.
Do not drink alcohol while taking Perizam. This is because alcohol can change the way Perizam works.
Do not take Perizam if:
Talk to your doctor before taking this medicine if you are more than 3 months pregnant or plan to become pregnant.
In fertility studies, no effects on fertility were observed in animals.
You may feel sleepy or have concentration or memory problems after taking this medicine. You may also experience double vision or you may react more slowly to things. If this happens, do not drive or use any tools or machines.
The medicine can affect your ability to drive as it may make you feel sleepy or dizzy.
Talk to your doctor or pharmacist if you are not sure whether it is safe for you to drive while taking this medicine.
Your prescriber should have discussed with you how long the course of oral suspension will last. They will arrange a plan for stopping treatment. This will outline how to gradually reduce the dose and stop taking the medicine. Your prescriber will ensure that your plan for stopping treatment is tailored to you and can be adapted according to your needs and experience of any withdrawal symptoms.
Perizam is usually given for 2 to 4 weeks. After that your doctor will decide whether you should keep taking this medicine.
Instructions for use of the syringe.
If you are taking a large dose, you may have to measure the dose with the syringe more than one time. It may be helpful to write on a piece of paper the amount of times you have to use the syringe.
Each time you take the dose, tick off a dose on the paper.
Then push the piston upward in order to remove any possible bubbles (Figure 4B). Finally, pull the piston down to the graduation mark corresponding to the quantity in millilitres (ml) prescribed by your doctor (Figure 4C).
If low doses are required, the 1mg/ml strength product is the most suitable presentation.
If high doses are required, the 2mg/ml strength product is the most suitable presentation.
Adults
Children (2 years and over)
Elderly
Do not suddenly stop taking this medicine. If you want to stop taking this medicine, discuss this with your prescriber first. They will tell you how to do this, usually by reducing the dose gradually so that any unpleasant withdrawal effects are kept to a minimum. This may occur over a period of weeks to months. Your prescriber will ensure that your plan for stopping treatment is tailored to you and can be adapted according to your needs and experience of any withdrawal symptoms.
Withdrawal symptoms such as:
If you have any further questions on the use of this medicine, ask your doctor or pharmacist.
Like all medicines, this medicine can cause side effects, although not everybody gets them. The following side effects may happen with this medicine:
Stop taking Perizam and see a doctor or go to a hospital straight away if you notice the symptoms listed above.
Common side effects (may affect up to 1 in 10 people:
Uncommon side effects (may affect up to 1 in 100 people):
Not known (frequency cannot be estimated from available data):
If you get any of the above side effects, your doctor may decide that your treatment needs to be stopped. These side-effects are more likely to happen in elderly people and children.
Very common side effects (may affect more than 1 in 10 people):
Common side effects (may affect up to 1 in 10 people):
Uncommon side effects (may affect up to 1 in 100 people):
Not known (frequency cannot be estimated from available data):
If you take this medicine for a long time, you are more likely to get the following side effects: anxiety, confusion, depression, loss of appetite and difficulty sleeping.
Use of Perizam may lead to a physical addiction. Stopping Perizam suddenly may lead to side effects. Dependence on Perizam may occur. Talk to your doctor if you feel you have developed a dependence on Perizam.
When you stop taking Perizam, you may experience drug withdrawal symptoms, which include:
headaches, muscle pain, anxiety, tension, depression, restlessness, sweating, confusion or irritability. Do not stop taking your tablets suddenly. This could lead to more serious symptoms such as loss of the sense of reality, feeling unreal or detached from life, and unable to feel emotion. Some patients have also experienced numbness or tingling of the arms or legs, tinnitus (ringing sounds in the ears), oversensitivity to light, sound and touch, uncontrolled or overactive movements, twitching, shaking, feeling sick, being sick, stomach upsets or stomach pain, loss of appetite, agitation, abnormally fast heartbeats, panic attacks, dizziness or feeling that you are about to fall, memory loss, hallucinations, feeling stiff and unable to move easily, feeling very warm, convulsions (sudden uncontrolled shaking or jerking of the body).
If you notice any of the following signs whilst taking Perizam, it could be a sign that you have become addicted.
If you notice any of these signs, it is important you talk to your prescriber.
If you get any side effects, talk to your doctor or pharmacist. This includes any possible side effects not listed in this leaflet. You can also report side effects directly (see details below). By reporting side effects you can help provide more information on the safety of this medicine.
United Kingdom
or search for MHRA Yellow Card in the Google Play or Apple App Store.
Perizam is an off-white suspension. It comes in a brown glass bottle holding 150ml of suspension with a 5ml syringe and bottle adaptor. The bottle adaptor is not pre-fitted.
This leaflet was last revised in 11/2025.
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