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NERVOUS SYSTEM › PSYCHOLEPTICS › ANTIPSYCHOTICS › Other antipsychotics
risperidone
N05AX08
Forms & Strengths
- Tablets: 0.25mg, 0.5mg, 1mg, 2mg, 3mg, 4mg
- Oral solution: 1mg/mL
- Long-acting injectable: 25mg, 37.5mg, 50mg
Adult Dosing
- Schizophrenia: 1mg twice daily, adjust by 1mg daily to 4-8mg daily
- Bipolar disorder: 1-2mg daily, adjust to 1-6mg daily
- Irritability in autism: 0.25mg daily, adjust by 0.25-0.5mg daily
Pediatric Dosing
- Irritability in autism (5-17 years): 0.25mg daily, adjust by 0.25-0.5mg daily
- Schizophrenia (13-17 years): 0.5mg daily, adjust by 0.5-1mg daily
Indications
- Schizophrenia treatment
- Bipolar disorder treatment
- Irritability in autistic disorder
Mechanism of Action
- Dopamine D2 receptor antagonist
- Serotonin 5-HT2A receptor antagonist
- Alpha-1 adrenergic receptor antagonist
Contraindications
- Known hypersensitivity to risperidone
- Concomitant use with certain medications like clozapine
Adverse Reactions
- Orthostatic hypotension
- Weight gain
- Hyperprolactinemia
- Extrapyramidal symptoms
Drug Interactions
- Strong CYP2D6 inhibitors (e.g., fluoxetine): Increased risperidone levels
- Carbamazepine: Decreased risperidone levels
Curated Content: Needs Vetting Before Put to Clinical Use