significant interaction between Paxil (paroxetine) and Risperdal (risperidone)
There's now evidence of a significant interaction between Paxil (paroxetine) and Risperdal (risperidone).
Paxil can increase Risperdal concentrations four-fold...enough to cause extrapyramidal symptoms in some patients.
Paxil is a potent CYP2D6 inhibitor and therefore can inhibit the metabolism of Risperdal. Prozac (fluoxetine) and Zoloft (sertraline) can also inhibit CYP2D6.
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