Apparently the smoking drug isn't doing too well with its side effects:

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The report, from the Institute for Safe Medication Practices, points out hundreds of serious problems reported since the drug was approved in May 2006, including dizziness, loss of consciousness, seizures, and abnormal spasms and movements.

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From: http://www.usatoday.com/news/health/...g_N.htm?csp=34