A Westbury man pleaded not guilty to a 32-count indictment on Thursday for possessing explosives, cocaine and what prosecutors say is the first Nassau County bust of a highly potent synthetic opioid called nitazene.

Developed in the 1950s, nitazene is as potent as fentanyl with the potential to be more deadly, drug enforcement officials say, because it is resistant to Narcan, the drug that can reverse the effects of an overdose, prosecutors say.

Anthony Gianatiempo, 34, was charged with 19 felony drug possession counts after Nassau County police and Drug Enforcement Administration agents raided his home on Cantiague Lane in August, confiscating 39 grams of fentanyl, 2 grams of heroin, 69 grams of methamphetamine, cocaine, ketamine and several brown cardboard tubes with fuses taped to

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