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Whitney Houston's toxicology report was positive for marijuana, alprazolam, Flexeril, and Benadryl. All other celebrity deaths had a toxicology report that included opioids and benzodiazepines. More than 30% of opioids (painkillers) also involve benzodiazepines (anti-anxiety drugs). Safe prescribing means not just appropriate opioid prescribing, but caution in prescribing multiple central nervous system medications.