Risperidone: uses, side effects & brands

Written & medically reviewed by Dr. Sanjay Anbu, MBBS · Last reviewed 5 November 2026

Risperidone is used for schizophrenia, bipolar disorder and severe irritability. It belongs to the Antipsychotic / mood stabiliser group. These treat serious mental-health conditions such as psychosis, bipolar disorder and severe agitation.

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Drug type — dosing is set by your doctor

Measure	Range
Drug class	Antipsychotic / mood stabiliser
Type	Prescription
Dose	Individual — ask your doctor or pharmacist

What it is used for

Schizophrenia
Bipolar disorder (mania)
Severe irritability or aggression in autism (in children, specialist use)
Persistent aggression in dementia (short-term, specialist use)

Common brand names

India: Risdone, Sizodon, Respidon
Worldwide: Risperdal

Common side effects

Restlessness, stiffness or tremor
Weight gain
Drowsiness
Breast swelling, milk discharge or period changes (raised prolactin)

Before taking it — precautions

Tell your doctor about heart disease, diabetes, seizures, Parkinson's disease or dementia
In elderly people with dementia it increases the risk of stroke; this needs careful review
Rise slowly to avoid dizziness; avoid alcohol

When to see a doctor urgently

High fever with stiff muscles and confusion (urgent)
Uncontrolled movements of the face, tongue or body
Fainting, fast heartbeat or signs of stroke such as face drooping (urgent)

Not a prescription — no dose shown. The right dose of risperidone depends on age, weight, kidney/liver function and the condition, so MedDroid does not show a dose here. Always get your dose from a doctor or pharmacist and the leaflet inside the pack. General educational information only.

Frequently asked questions

Why can risperidone affect periods or the breasts?

It can raise the hormone prolactin, which may cause missed periods, breast swelling or milk discharge. Tell your doctor if this happens.

Does risperidone cause weight gain?

It can, though usually less than olanzapine. Diet and activity help, and your doctor may check weight and sugar.

Is there a long-acting form?

Yes, risperidone is also available as a long-acting injection for people who find daily tablets difficult.

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Sources & further reading

Reviewed by Dr. Sanjay Anbu, MBBS. MedDroid is an AI medical assistant and can make mistakes. It provides general health information, not a diagnosis or medical advice — always consult a qualified clinician. In an emergency, contact your local emergency number immediately.