I don't know, but those in the know are still (allegedly) using them.
> PRISONERS INSIDE THE U.S. military's detention center at Guantanamo Bay were forcibly given "mind altering drugs," including being injected with a powerful anti-psychotic sedative used in psychiatric hospitals. Prisoners were often not told what medications they received, and were tricked into believing routine flu shots were truth serums. It's a serious violation of medical ethics, made worse by the fact that the military continued to interrogate prisoners while they were doped on psychoactive chemicals.
> BZ was invented by the Swiss pharmaceutical company Hoffman-LaRoche in 1951.[5] The company was investigating anti-spasmodic agents, similar to tropine, for treating gastrointestinal ailments when the chemical was discovered.[5] It was then investigated for possible use in ulcer treatment, but was found unsuitable. At this time the United States military investigated it along with a wide range of possible nonlethal, psychoactive incapacitating agents including psychedelic drugs such as LSD and THC, dissociative drugs such as ketamine and phencyclidine, potent opioids such as fentanyl, as well as several glycolate anticholinergics.[6][7]
> By 1959, the United States Army showed significant interest in deploying it as a chemical warfare agent.[5] It was originally designated "TK", but when it was standardized by the Army in 1961, it received the NATO code name "BZ".[5] The agent commonly became known as "Buzz" because of this abbreviation and the effects it had on the mental state of the human volunteers intoxicated with it in research studies at Edgewood Arsenal in Maryland.[5]
> As described in retired Army psychiatrist James Ketchum's autobiographical book Chemical Warfare: Secrets Almost Forgotten (2006), work proceeded in 1964 when a general envisioned a scheme to incapacitate an entire trawler with aerosolized BZ; this effort was dubbed Project DORK.[8] BZ was ultimately weaponized for delivery in the M44 generator cluster and the M43 cluster bomb, until all such stocks were destroyed in 1989 as part of a general downsizing of the US chemical warfare program.
> The U.S. Army tested BZ as well as other "psycho-chemical" agents on human subjects at Edgewood Arsenal in Maryland from 1955 to 1975, according to declassified documents.
> PRISONERS INSIDE THE U.S. military's detention center at Guantanamo Bay were forcibly given "mind altering drugs," including being injected with a powerful anti-psychotic sedative used in psychiatric hospitals. Prisoners were often not told what medications they received, and were tricked into believing routine flu shots were truth serums. It's a serious violation of medical ethics, made worse by the fact that the military continued to interrogate prisoners while they were doped on psychoactive chemicals.
> BZ was invented by the Swiss pharmaceutical company Hoffman-LaRoche in 1951.[5] The company was investigating anti-spasmodic agents, similar to tropine, for treating gastrointestinal ailments when the chemical was discovered.[5] It was then investigated for possible use in ulcer treatment, but was found unsuitable. At this time the United States military investigated it along with a wide range of possible nonlethal, psychoactive incapacitating agents including psychedelic drugs such as LSD and THC, dissociative drugs such as ketamine and phencyclidine, potent opioids such as fentanyl, as well as several glycolate anticholinergics.[6][7] > By 1959, the United States Army showed significant interest in deploying it as a chemical warfare agent.[5] It was originally designated "TK", but when it was standardized by the Army in 1961, it received the NATO code name "BZ".[5] The agent commonly became known as "Buzz" because of this abbreviation and the effects it had on the mental state of the human volunteers intoxicated with it in research studies at Edgewood Arsenal in Maryland.[5]
> As described in retired Army psychiatrist James Ketchum's autobiographical book Chemical Warfare: Secrets Almost Forgotten (2006), work proceeded in 1964 when a general envisioned a scheme to incapacitate an entire trawler with aerosolized BZ; this effort was dubbed Project DORK.[8] BZ was ultimately weaponized for delivery in the M44 generator cluster and the M43 cluster bomb, until all such stocks were destroyed in 1989 as part of a general downsizing of the US chemical warfare program.
> The U.S. Army tested BZ as well as other "psycho-chemical" agents on human subjects at Edgewood Arsenal in Maryland from 1955 to 1975, according to declassified documents.