Risperdal, illustration of tablet form (not a photo of the actual pack)

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Risperdal

Risperidone

Prescription required

$85.00

1mg · 5 × 20 tablets · 3 months supply

Brand· By Janssen Cilag

$28.33 per month

Brand or generic

Generic packs carry the same active ingredient at the same strength.

Strength

How long a supply?

3 months$28.33 a month
6 months$25.50 a month
Supplied from Israel

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Annual cost

$306a year at this pack size

Prescription required

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FDA boxed warningIncreased mortality in elderly patients with dementia-related psychosis

Elderly patients with dementia-related psychosis treated with antipsychotic drugs are at an increased risk of death. RISPERDAL is not approved for the treatment of patients with dementia-related psychosis.

Elderly patients with dementia-related psychosis treated with antipsychotic drugs are at an increased risk of death. RISPERDAL is not approved for use in patients with dementia-related psychosis.

Read this with the rest of the clinical information

About Risperdal

Overview

Risperdal contains risperidone, an atypical antipsychotic medicine. It is used to treat schizophrenia and acute manic or mixed episodes associated with bipolar I disorder, either alone or with lithium or valproate. It is also used to treat irritability associated with autistic disorder. How it works in schizophrenia is not fully understood, but it may act by blocking receptors for the brain chemicals dopamine and serotonin.

What it treats

- Schizophrenia. - Acute manic or mixed episodes associated with bipolar I disorder, used alone or with lithium or valproate. - Irritability associated with autistic disorder.

Safety information

Side effects

Common side effects include sleepiness, dizziness, tiredness, anxiety, blurred vision, tremor, muscle stiffness, slowed movements, restlessness and muscle spasms. Digestive effects include nausea, vomiting, stomach pain or discomfort, indigestion, diarrhea, constipation, dry mouth and increased saliva. Increased appetite, weight gain, rash, a blocked nose, upper respiratory tract infections and a sore throat have also been reported. Serious risks that warrant contacting a doctor include neuroleptic malignant syndrome, potentially persistent involuntary movements (tardive dyskinesia), seizures, difficulty swallowing, a prolonged painful erection, low white blood cell counts, falls and problems regulating body temperature. Risperdal can also cause a drop in blood pressure when standing and impair thinking and movement; use caution when operating machinery. Other important risks include high blood sugar or diabetes, changes in blood fats, significant weight gain and persistently raised prolactin levels. Contact a doctor if you develop excessive thirst, frequent urination, increased hunger or weakness, which may indicate high blood sugar. Blood sugar and weight monitoring may be needed, and blood counts should be checked in people with a history of significantly low white blood cell counts. Risperdal is associated with an increased risk of death and stroke in older adults with dementia-related psychosis. It is not approved for use in patients with dementia-related psychosis.

FDA boxed warning

Increased mortality in elderly patients with dementia-related psychosis

Elderly patients with dementia-related psychosis treated with antipsychotic drugs are at an increased risk of death. RISPERDAL is not approved for the treatment of patients with dementia-related psychosis.

Elderly patients with dementia-related psychosis treated with antipsychotic drugs are at an increased risk of death. RISPERDAL is not approved for use in patients with dementia-related psychosis.

A boxed warning is the strongest warning the US Food and Drug Administration requires on a medicine label. Text is taken from the official label, with internal section references removed.

When to call your doctor

- Seek immediate medical attention for a seizure. - Get medical help immediately for difficulty swallowing. - Seek urgent care for an erection that lasts unusually long. - Contact your doctor immediately for new, uncontrolled movements. - Contact your doctor immediately for increased thirst, frequent urination, increased hunger or weakness, which may signal high blood sugar.

If symptoms are severe or getting worse quickly, seek emergency care rather than waiting.

Before taking this medicine

Do not take Risperdal if you have a known allergy to risperidone, paliperidone or any of its ingredients. Severe allergic reactions, including anaphylaxis and angioedema (swelling), have been reported. Risperdal is not approved for dementia-related psychosis. Stroke and other cerebrovascular events have been reported in elderly patients with this condition. Tell your prescriber if you have diabetes or risk factors for diabetes, a history of seizures, conditions that increase seizure risk, a history of significantly low white blood cell counts, or a tendency to develop low blood pressure when standing. Blood sugar, weight and, in some patients, white blood cell counts need monitoring. Risperdal can also cause changes in blood fats and persistently raised prolactin levels. Other important risks include neuroleptic malignant syndrome, a serious reaction requiring immediate discontinuation and close monitoring, and tardive dyskinesia, an involuntary movement disorder. Risperdal may impair thinking and movement; use caution when operating machinery. Tell your prescriber if you are pregnant. Exposure during the third trimester may cause movement problems or withdrawal symptoms in the newborn.

Interactions

Tell your doctor if you take carbamazepine, fluoxetine or paroxetine. Carbamazepine and other medicines that increase certain enzyme activity can lower risperidone levels in the blood. Fluoxetine, paroxetine and other medicines that block the CYP2D6 enzyme can raise risperidone levels. Your prescriber may need to adjust your treatment if you take these medicines together.

Using Risperdal

Dosing

Dosing is set by your prescriber. Each health care professional may prescribe medication differently according to a patient's medical history and condition, so follow the directions on your prescription label and speak to your doctor or pharmacist before changing anything.

Storage

Store below 25°C in a dry place, in the original pack, away from direct light and moisture. Do not keep it in a bathroom. Keep all medicines out of the sight and reach of children.

Clinical information on this page is summarised from the US FDA label RISPERDAL (RISPERIDONE) TABLET RISPERDAL M-TAB (RISPERIDONE) TABLET, ORALLY DISINTEGRATING RISPERDAL (RISPERIDONE) SOLUTION [JANSSEN PHARMACEUTICALS, INC.] (DailyMed, retrieved 19 September 2026).

Patient information and references

Official and supporting information to read alongside advice from your prescriber or pharmacist.

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