About risperidone
Atypical antipsychotic
Used for
- Schizophrenia
- Bipolar mania
- Irritability associated with autism
Usual adult dose
Schizophrenia: usually 2 mg daily initially, adjusted to 4–6 mg daily. Bipolar mania: usually 2–3 mg daily.
Usual dose in children
Autism-related irritability: ages 5–16, usually 0.25–0.5 mg daily initially; adjusted by weight and response. Other uses depend on age and local approval.
Common side effects
- Sleepiness or dizziness
- Increased appetite and weight gain
- Restlessness or tremor
- Raised prolactin, sometimes causing sexual or menstrual problems
Important warnings
- May increase blood sugar, cholesterol, and weight.
- Can cause movement problems; seek urgent care for fever, stiffness, and confusion.
- Can cause dizziness on standing and increase fall risk.
- Older adults with dementia-related psychosis have increased risk of death; use is not approved for this condition.
Pregnancy
Use only when the expected benefit outweighs risks. Exposure near delivery may cause newborn movement, feeding, or breathing problems.
Breastfeeding
Risperidone enters breast milk. Infant sleepiness and poor feeding are possible; use requires clinical assessment.
Interactions
- Other medicines that cause sleepiness, including opioids and alcohol
- Blood-pressure medicines may worsen dizziness or fainting.
- Fluoxetine, paroxetine, and other CYP2D6 inhibitors may increase risperidone levels.
- Carbamazepine and rifampin may reduce risperidone levels.
AI-generated from general medical knowledge, not from this product's official leaflet. It may be incomplete or out of date. Not medical advice — ask a pharmacist or doctor before making any decision.