The mystery gas used in Moscow during the hostage rescue likely is not fentanyl, as claimed by Russian health officials, but could be from a class of anesthetic gases that includes halothane, commonly ...

When halothane was introduced as an anesthetic in 1956, it seemed nearly perfect. Unlike ether and cyclopropane, it is both nonflammable and nonexplosive—a valuable asset in the modern operating room ...

Is it safe to be exposed to halothane gas during the first trimester of pregnancy? I sometime assist during surgery, and although all care is taken, a bit of halothane can be smelled at times in the ...

NPR's David Kestenbaum reports that another strong substance may have been mixed with the powerful narcotic gas pumped into a Moscow theater held by Chechen rebels last week. Russian health officials ...

Further clues to the identity of the knock-out agent used to end the Moscow hostage crisis have emerged, indicating that a likely candidate is a cocktail of an opioid narcotic such as fentanyl ...

Further clues to the identity of the knock-out agent used to end the Moscow hostage crisis have emerged, indicating that a likely candidate is a cocktail of an opioid narcotic such as fentanyl ...