Interação entre Lítio e Risperidona

• Encephalopathic Syndrome: Increased risk in patients treated with lithium and an antipsychotic.

Because of a possible causal relationship between these events and the concomitant administration of lithium and antipsychotics, patients receiving such combined treatment should be monitored closely for early evidence of neurological toxicity and treatment discontinued promptly if such signs appear.

Atypical and Typical Antipsychotic Drugs Clinical Impact: Reports of neurotoxic reactions in patients treated with both lithium and an antipsychotic, ranging from extrapyramidal symptoms to neuroleptic malignant syndrome, as well as reports of an encephalopathic syndrome in few patients treated with concomitant therapy [see Warnings and Precautions ( 5.5 )] .

Encephalopathic Syndrome An encephalopathic syndrome, characterized by weakness, lethargy, fever, tremulousness and confusion, extrapyramidal symptoms, leukocytosis, elevated serum enzymes, BUN and fasting blood glucose, has occurred in patients treated with lithium and an antipsychotic.

This encephalopathic syndrome may be similar to or the same as neuroleptic malignant syndrome (NMS).

Lithium Repeated doses of oral RISPERDAL (3 mg twice daily) did not affect the exposure (AUC) or peak plasma concentrations (C max ) of lithium (N=13).