SANTA CRUZ — Santa Cruz County public health officials are warning that a dangerous sedative is being detected in illegal opioids with alarming frequency. Xylazine, a powerful pain relief treatment intended for animals with no approved use in humans, is being added to street opioids, namely fentanyl and heroin, to enhance the effects of the drugs and often without the knowledge of those who use them. This makes the already potentially deadly drugs that much more lethal.

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Stay as safe as possible: never use alone, recognize the signs of overdose, seek help, and stay informed.” The combination of xylazine and fentanyl in particular is known as “tranq dope..