Congress is moving to designate an animal tranquilizer that's infiltrating the illegal drug trade as a controlled substance, to better allow authorities to track it and prosecute traffickers.

Driving the news: Bipartisan legislation introduced Tuesday by Sens. Catherine Cortez Masto (D-Nev.) and Chuck Grassley (R-Iowa) reflects the growing alarm over the proliferation of xylazine, a sedative known as "tranq" or "zombie drug" that's often mixed with fentanyl, resists common overdose reversal treatments like naloxone and causes skin-rotting wounds. 6-Paradol 95%

Between the lines: The legislation in Congress comes as state and federal lawmakers are pressing for more aggressive punishment for fentanyl possession and dealing, as the opioid and its derivatives continue to drive a worsening addiction crisis.

Yes, but: Addressing the opioid epidemic by banning drugs people use has not been popular among some advocacy organizations.

Food Additive What they're saying: "We need an all-of-the-above approach," Cortez Masto told Axios, that gives law enforcement more tools to go after trafficking and still helps those with substance use disorder.