Extended-release tablets: 1.5 mg, 3 mg, 6 mg, 9 mg
– Extended-release injectable suspension: 39 mg, 78 mg, 117 mg, 156 mg, 234 mg
Generic name: paliperidone (pal ee PER i done)
Medication class: Second generation antipsychotic (SGA), atypical antipsychotic
All FDA black box warnings are at the end of this fact sheet. Please review before taking this medication.
What is Invega® and what does it treat?
Paliperidone is a medication that works in the brain to treat schizophrenia and schizoaffective disorder. It is also known as a second generation antipsychotic (SGA) or atypical antipsychotic. Paliperidone rebalances dopamine and serotonin to improve thinking, mood, and behavior.
Schizoaffective disorder is an illness that includes abnormal moods (elevated and/or depressed) and psychosis.
Symptoms of schizophrenia/psychosis include:
Hallucinations - imagined voices or images that seem real
Delusions - beliefs that are not true (e.g., other people are reading your thoughts)
Disorganized thinking or trouble organizing your thoughts and making sense
Little desire to be around other people
Trouble speaking clearly
Lack of motivation
Mood symptoms include:
Depressed mood – feeling sad, empty, or tearful
Feeling worthless, guilty, hopeless, or helpless
Loss of interest or pleasure in normal activities
Sleep and eat more or less than usual (for most people it is less)
Low energy, trouble concentrating, or thoughts of death (suicidal thinking)
Psychomotor agitation (ânervous energy’)
Psychomotor retardation (feeling like you are moving in slow motion)
Feeling irritable or âhighâ
Having increased self esteem
Feeling like you don’t need to sleep
Feeling the need to continue to talk
Feeling like your thoughts are too quick (racing thoughts)
Getting involved in activities that are risky or could have bad consequences (e.g. excessive spending)
Paliperidone may help some or all of these symptoms.
This medication sheet will focus primarily on schizophrenia. You can find more information about schizoaffective disorder at http://www2.nami.org/Template.cfm?Section=By_Illness.
What is the most important information I should know about Invega®?
Schizophrenia requires long-term treatment. Do not stop taking paliperidone, even when you feel better.
Only your healthcare provider can determine the length of paliperidone treatment that is right for you.
Missing doses of paliperidone may increase your risk for a relapse in your symptoms.
Do not stop taking paliperidone or change your dose without talking to with your healthcare provider first.
For paliperidone to work properly, it should be taken everyday as ordered by your healthcare provider.
Are there specific concerns about Invega® and pregnancy?
If you are planning on becoming pregnant, notify your healthcare provider to best manage your medications. People living with schizophrenia who wish to become pregnant face important decisions. This is a complex decision since untreated schizophrenia has risks to the fetus, as well as the mother. It is important to discuss the risks and benefits of treatment with your doctor and caregivers.
Caution is advised with breastfeeding since paliperidone does pass into breast milk.
What should I discuss with my healthcare provider before taking Invega®?
Symptoms of your condition that bother you the most
If you have thoughts of suicide or harming yourself
Medications you have taken in the past for your condition, whether they were effective or caused any adverse effects
If you ever had muscle stiffness, shaking, tardive dyskinesia, neuroleptic malignant syndrome, or weight gain caused by a medication
If you experience side effects from your medications, discuss them with your provider. Some side effects may pass with time, but others may require changes in the medication.
Any psychiatric or medical problems you have, such as heart rhythm problems, long QT syndrome, heart attacks, diabetes, high cholesterol, or seizures
If you have a family history of diabetes or heart disease
All other medications you are currently taking (including over the counter products, herbal and nutritional supplements) and any medication allergies you have
Other non-medication treatment you are receiving, such as talk therapy or substance abuse treatment. Your provider can explain how these different treatments work with the medication.
If you are pregnant, plan to become pregnant, or are breast-feeding
If you smoke, drink alcohol, or use illegal drugs
How should I take Invega®?
Paliperidone tablets are usually taken 1 time per day with or without food.
Typically patients begin at a low dose of medicine and the dose is increased slowly over several weeks.
The dose of the tablets usually ranges from 3 mg to 12 mg. The dose of the injection usually ranges from 78 mg to 234 mg. Only your healthcare provider can determine the correct dose for you.
The tablets should be swallowed whole. They should not be chewed, crushed, or broken.
Use a calendar, pillbox, alarm clock, or cell phone alert to help you remember to take your medication. You may also ask a family member a friend to remind you or check in with you to be sure you are taking your medication.
The long-acting injection form of paliperidone is administered twice in the first 8 days of treatment, then every 4 weeks. Your healthcare provider will administer these injections.
If you miss a dose of paliperidone, take it as soon as you remember, unless it is closer to the time of your next dose. Discuss this with your healthcare provider. Do not double your next dose or take more than what is prescribed.
What should I avoid while taking Invega®?
Avoid drinking alcohol or using illegal drugs while you are taking paliperidone. They may decrease the benefits (e.g. worsen your confusion) and increase adverse effects (e.g. sedation) of the medication.
What happens if I overdose with Invega®?
If an overdose occurs call your doctor or 911. You may need urgent medical care. You may also contact the poison control center at 1-800-222-1222.
A specific treatment to reverse the effects of paliperidone does not exist.
What are possible side effects of Invega®?
Common Side Effects
Low blood pressure, feeling dizzy and increased heart rate, especially when standing up
Fatigue, sleepiness, headache, constipation, and appetite increases are also common and more likely in children than in adults.
Rare Side Effects
Paliperidone may increase the blood levels of a hormone called prolactin. Side effects of increased prolactin levels include females losing their period, production of breast milk and males losing their sex drive or possibly experiencing erectile problems. Long term (months or years) of elevated prolactin can lead to osteoporosis, or increased risk of bone fractures.
Serious Side Effects
Some people may develop muscle related side effects while taking paliperidone. The technical terms for these are âextrapyramidal effectsâ (EPS) and âtardive dyskinesiaâ (TD). Symptoms of EPS include restlessness, tremor, and stiffness. TD symptoms include slow or jerky movements that one cannot control, often starting in the mouth with tongue rolling or chewing movements.
Second generation antipsychotics (SGAs) increase the risk of weight gain, high blood sugar, and high cholesterol. This is also known as metabolic syndrome. Your healthcare provider may ask you for a blood sample to check your cholesterol, blood sugar, and hemoglobin A1c (a measure of blood sugar over time) while you take this medication.
For more information including ideas for healthy eating and exercise, see the NAMI Hearts and Minds Program http://www2.nami.org/template.cfm?section=Hearts_and_Minds.
For the relative risk of each medication and monitoring recommendations, see Table 2 in the Consensus Conference on Antipsychotic Drugs http://care.diabetesjournals.org/content/27/2/596.full.pdf+html.
SGAs have been linked with higher risk of death, strokes, and transient ischemic attacks (TIAs) in elderly people with behavior problems due to dementia.
All antipsychotics have been associated with the risk of sudden cardiac death due to an arrhythmia (irregular heart beat). To minimize this risk, antipsychotic medications should be used in the smallest effective dose when the benefits outweigh the risks. Your doctor may order an EKG to monitor for irregular heart beat.
Neuroleptic malignant syndrome is a rare, life threatening adverse effect of antipsychotics which occurs in <1% of patients. Symptoms include confusion, fever, extreme muscle stiffness, and sweating. If any of these symptoms occur, contact your healthcare provider immediately.
Are there any risks of taking Invega® for long periods of time?
Tardive dyskinesia (TD) is a side effect that develops with prolonged use of antipsychotics. Medications such as paliperidone have been shown to have a lower risk of TD compared to older antipsychotics, such as Haldol® (haloperidol). If you develop symptoms of TD, such as grimacing, sucking, and smacking of lips, or other movements that you cannot control, contact your healthcare provider immediately. All patients taking either first or second generation antipsychotics should have an Abnormal Involuntary Movement Scale (AIMS) completed regularly by their healthcare provider to monitor for TD.
Second generation antipsychotics (SGAs) increase the risk of diabetes, weight gain, high cholesterol, and high triglycerides. (See âSerious Side Effectsâ section for monitoring recommendations.)
What other medications may interact with Invega®?
Paliperidone may block the effects of agents used to treat Parkinson’s disease such as levodopa (Sinemet®), bromocriptine, pramipexole (Mirapex®), ropinirole (Requip®), and others.
Paliperidone may lower your blood pressure. Medications used to lower blood pressure may increase this effect and increase your risk of falling. Propranolol (Inderal®) is an example of this type of medication.
The following medications may increase the risk of heart problems when used with paliperidone.
Antipsychotics including chlorpromazine (Thorazine®), thioridizine (Mellaril®), iloperidone (Fanapt®), asenapine (Saphris®), quetiapine (Seroquel®), and ziprasidone (Geodon®).
Antiarrhymics (heart rhythm medications), including procainamide, quinidine, amiodarone (Cordarone®), dronedarone (Multaq®), and sotalol (Betapace®).
The following medications may increase the levels and effects of paliperidone: divalproex sodium (Depakote®).
The following medications may decrease the levels and effects of paliperidone: carbamazepine (Tegretol®, Equatro®).
How long does it take for Invega® to work?
It is very important to tell your doctor how you feel things are going during the first few weeks after you start taking paliperidone. It will probably take several weeks to see big enough changes in your symptoms to decide if paliperidone is the right medication for you.
Antipsychotic treatment is generally needed lifelong for persons with schizophrenia. Your doctor can best discuss the duration of treatment you need based on your symptoms and illness.
Hallucinations, disorganized thinking, and delusions may improve in the first 1-2 weeks
Sometimes these symptoms do not completely go away
Motivation and desire to be around other people can take at least 1-2 weeks to improve
Symptoms continue to get better the longer you take paliperidone
It may take 2-3 months before you get the full benefit of paliperidone
College of Psychiatric and Neurologic Pharmacists
Summary of FDA Black Box Warnings
Increased Mortality in Elderly Patients with Dementia Related Psychosis
Both first generation (typical) and second generation (atypical) antipsychotics are associated with an increased risk of mortality in elderly patients when used for dementia related psychosis.
Although there were multiple causes of death in studies, most deaths appeared to be due to cardiovascular causes (e.g. sudden cardiac death) or infection (e.g. pneumonia).
Antipsychotics are not indicated for the treatment of dementia-related psychosis.