Patient Leaflet Updated 28-May-2026 | Zentiva
Paliperidone Zentiva prolonged-release suspension for injection in pre-filled syringe
Paliperidone Zentiva 50 mg prolonged release suspension for injection in pre-filled syringe
Paliperidone Zentiva 75 mg prolonged release suspension for injection in pre-filled syringe
Paliperidone Zentiva 100 mg prolonged release suspension for injection in pre-filled syringe
Paliperidone Zentiva 150 mg prolonged release suspension for injection in pre-filled syringe
1. What Paliperidone Zentiva is and what it is used for
2. What you need to know before you use Paliperidone Zentiva
3. How to use Paliperidone Zentiva
4. Possible side effects
5. How to store Paliperidone Zentiva
6. Contents of the pack and other information
The name of this medicine is Paliperidone Zentiva 50 mg or 75 mg or 100 mg or 150 mg prolonged release suspension for injection in pre-filled syringe (called Paliperidone Zentiva throughout this leaflet).
Paliperidone Zentiva contains the active substance paliperidone which belongs to the class of antipsychotic medicines and is used as a maintenance treatment for the symptoms of schizophrenia in adult patients stabilised on paliperidone or risperidone.
If you have shown responsiveness to paliperidone or risperidone in the past and have mild to moderate symptoms your doctor may start treatment with Paliperidone Zentiva without prior stabilisation with paliperidone or risperidone.
Schizophrenia is a disease with “positive” and “negative” symptoms. Positive means an excess of symptoms that are not normally present. For example, a person with schizophrenia may hear voices or see things that are not there (called hallucinations), believe things that are not true (called delusions), or feel unusually suspicious of others.
Negative means a lack of behaviours or feelings that are normally present. For example, a person with schizophrenia may appear withdrawn and may not respond at all emotionally or may have trouble speaking in a clear and logical way. People with this disease may also feel depressed, anxious, guilty, or tense.
Paliperidone Zentiva can help alleviate the symptoms of your disease and stop your symptoms from coming back.
Talk to your doctor, pharmacist or nurse before using Paliperidone Zentiva.
This medicine has not been studied in elderly patients with dementia. However, elderly patients with dementia, who are treated with other similar types of medicine, may have an increased risk of stroke or death (see section 4, possible side effects).
All medicines have side effects and some of the side effects of this medicine can worsen the symptoms of other medical conditions. For that reason, it is important to discuss with your doctor any of the following conditions which can potentially worsen during treatment with this medicine:
If you have any of these conditions, please talk to your doctor as they may want to adjust your dose or monitor you for a while.
As dangerously low numbers of a certain type of white blood cell needed to fight infection in your blood has been seen very rarely with patients taking this medicine, your doctor may check your white blood cell counts.
Even if you have previously tolerated oral paliperidone or risperidone, rarely allergic reactions occur after receiving injections of Paliperidone Zentiva. Seek medical attention right away if you experience a rash, swelling of your throat, itching, or problems breathing as these may be signs of a serious allergic reaction.
This medicine may cause you to gain weight. Significant weight gain may adversely affect your health. Your doctor should regularly measure your body weight.
As diabetes mellitus or worsening of pre-existing diabetes mellitus have been seen with patients taking this medicine, your doctor should check for signs of high blood sugar. In patients with pre-existing diabetes mellitus blood glucose should be monitored regularly.
Since this medicine may reduce your urge to vomit, there is a chance that it may mask the body’s normal response to ingestion of toxic substances or other medical conditions.
During an operation on the eye for cloudiness of the lens (cataract), the pupil (the black circle in the middle of your eye) may not increase in size as needed. Also, the iris (the coloured part of the eye) may become floppy during surgery and that may lead to eye damage. If you are planning to have an operation on your eye, make sure you tell your eye doctor that you are taking this medicine.
This medicine is not for people who are under 18 years old.
Tell your doctor if you are taking, have recently taken or might take any other medicines.
Taking this medicine with carbamazepine (an anti-epileptic and mood stabiliser) may require a change to your dose of this medicine.
Since this medicine works primarily in the brain, interference from other medicines that work in the brain can cause an exaggeration of side effects such as sleepiness or other effects on the brain such as other psychiatric medications, opioids, antihistamines and sleep medication.
Since this medicine can lower blood pressure, care should be taken when this medicine is used with other medicines that lower blood pressure.
This medicine can reduce the effect of medicines against Parkinson’s disease and restless legs syndrome (e.g., levodopa).
This medicine may cause an electrocardiogram (ECG) abnormality demonstrating a long time for an electrical impulse to travel through a certain part of the heart (known as “QT prolongation”). Other medicines that have this effect include some medicines used to treat the rhythm of the heart or to treat infection, and other antipsychotics.
If you are prone to develop convulsions, this medicine may increase your chance of experiencing them. Other medicines that have this effect include some medicines used to treat depression or to treat infection, and other antipsychotics.
Paliperidone Zentiva should be used with caution with medicines that increase the activity of the central nervous system (psychostimulants such as methylphenidate).
Alcohol should be avoided.
If you are pregnant or breast-feeding, think you may be pregnant or are planning to have a baby, ask your doctor or pharmacist for advice before taking this medicine. You should not use this medicine during pregnancy unless this has been discussed with your doctor. The following symptoms may occur in newborn babies of mothers that have used paliperidone in the last trimester (last three months of their pregnancy): shaking, muscle stiffness and/or weakness, sleepiness, agitation, breathing problems, and difficulty in feeding. If your baby develops any of these symptoms you may need to contact your doctor.
This medicine can pass from mother to baby through breast milk and may harm the baby. Therefore, you should not breastfeed when using this medicine.
Dizziness, extreme tiredness and vision problems may occur during treatment with this medicine (see section 4). This should be considered in cases where full alertness is required, e.g., when driving a car or handling machines.
This medicine contains less than 1 mmol sodium (23 mg) per dose, that is to say essentially ‘sodium-free’.
This medicine contains 12 mg of polysorbate in each ml which is equivalent to 12 mg/ml. Polysorbates may cause allergic reactions. Tell your doctor if you have any known allergies.
This medicine is administered by your doctor or other healthcare professional. Your doctor will tell you when you need your next injection. It is important not to miss your scheduled dose. If you cannot keep your appointment with the doctor, make sure you call them right away so another appointment can be made as soon as possible.
You will receive the first injection (150 mg) and second injection (100 mg) of this medicine in the upper arm approximately one week apart. Thereafter, you will receive an injection (ranging from 50 mg to 150 mg) in either the upper arm or buttocks once a month.
If your doctor is switching you from risperidone long acting injection to this medicine, you will receive the first injection of this medicine (ranging from 50 mg to 150 mg) in either the upper arm or buttocks on the date that your next injection was scheduled. Thereafter, you will receive an injection (ranging from 50 mg to 150 mg) in either the upper arm or buttocks once a month.
Depending on your symptoms, your doctor may increase or decrease the amount of medicine you receive by one dose level at the time of your scheduled monthly injection.
Patients with kidney problems
Your doctor may adjust your dose of this medicine based on your kidney function. If you have mild kidney problems your doctor may give you a lower dose. If you have moderate or severe kidney problems this medicine should not be used.
Elderly
Your doctor may reduce your dose of this medicine if your kidney function is reduced.
This medicine will be given to you under medical supervision; it is, therefore, unlikely that you will be given too much.
Patients who have been given too much paliperidone may experience the following symptoms: drowsiness or sedation, fast heart rate, low blood pressure, an abnormal electrocardiogram (electrical tracing of the heart), or slow or abnormal movements of the face, body, arms or legs.
If you stop receiving your injections, you will lose the effects of the medicine. You should not stop using this medicine unless told to do so by your doctor as your symptoms may return.
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:
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
Rare side effects: may affect up to 1 in 1,000 people
Not known: frequency cannot be estimated from the available data
If you get any side effects, talk to your doctor, pharmacist or nurse. This includes any possible side effects not listed in this leaflet. You can also report side effects directly via the Yellow card Scheme at: www.mhra.gov.uk/yellowcard or search for MHRA Yellow Card in the Google Play or Apple App Store. By reporting side effects, you can help provide more information on the safety of this medicine.
Keep this medicine out of the sight and reach of children.
Do not use this medicine after the expiry date which is stated on the carton. The expiry date refers to the last day of that month.
Do not store above 30°C. Do not freeze.
Do not throw away any medicines via wastewater or household waste.
Ask your pharmacist how to throw away medicines you no longer use. These measures will help to protect the environment.
The active substance is paliperidone.
Each Paliperidone Zentiva 50 mg pre-filled syringe contains 78 mg paliperidone palmitate.
Each Paliperidone Zentiva 75 mg pre-filled syringe contains 117 mg paliperidone palmitate.
Each Paliperidone Zentiva 100 mg pre-filled syringe contains 156 mg paliperidone palmitate.
Each Paliperidone Zentiva 150 mg pre-filled syringe contains 234 mg paliperidone palmitate.
The other ingredients are:
Polysorbate 20
Macrogol 4000
Citric acid monohydrate
Disodium hydrogen phosphate anhydrous
Sodium dihydrogen phosphate monohydrate
Sodium hydroxide (for pH adjustment)
Water for injections
Paliperidone Zentiva is a white to off-white prolonged release suspension for injection in a pre-filled syringe.
Each pack contains 1 pre-filled syringe and 2 needles.
Not all pack sizes may be marketed.
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This leaflet was last revised in January 2026.
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