About risperidone
Second-generation antipsychotic
Used for
- Schizophrenia
- Manic episodes associated with bipolar disorder
- Persistent aggression in some children with autism
Usual adult dose
Schizophrenia: usually 2 mg daily initially, adjusted to 2–6 mg daily. Mania: usually 2–3 mg daily.
Usual dose in children
Autism-related aggression: for ages 5–17, usually 0.25–0.5 mg daily initially, adjusted by weight and response.
Common side effects
- Sleepiness or dizziness
- Weight gain and increased appetite
- Movement problems, including tremor or stiffness
- Raised prolactin, sometimes causing sexual or menstrual problems
Important warnings
- Can cause tardive dyskinesia, a potentially lasting movement disorder.
- May raise blood sugar and cholesterol; weight and metabolic health need monitoring.
- Increased risk of death and stroke in older adults with dementia-related psychosis.
- Can cause low blood pressure, falls, or abnormal heart rhythm.
Pregnancy
Use during pregnancy only when clearly needed; exposure near delivery may cause newborn movement or withdrawal symptoms.
Breastfeeding
Risperidone enters breast milk; it may cause sleepiness or feeding problems in infants.
Interactions
- Other medicines causing sleepiness or lowering blood pressure can increase these effects.
- Fluoxetine, paroxetine, and some other medicines can raise risperidone levels.
- Carbamazepine and rifampicin can lower risperidone levels.
- Medicines that prolong the QT interval may increase abnormal heart rhythm risk.
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 It may be incomplete or out of date.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.