How long after taking Risperdal do symptoms or serious complications appear?


A medication’s adverse side effects can occur at any time once treatment commences. In one case involving Risperdal gynecomastia, a boy developed breasts after taking the drug for five years. Other symptoms may present sooner. One study found that elevated prolactin levels in Risperdal patients could persist for two years after treatment stopped. Prolactin is a hormone that stimulates breast growth.

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