Xenon gas shown to be powerful for extinguishing fear memories when used in combination with exposure therapy.

FTA:

“Unlike other drugs or medications that may also block NMDA receptors involved in memory, xenon gets in and out of the brain very quickly,” says Meloni. “This suggests that xenon could be given at the exact time the memory is reactivated, and for a limited amount of time, which may be key features for any potential therapy used in humans.”

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Interestingly, another study also just got some press showing that xenon might be very effective at reducing damage caused by inflammatory processes after head trauma.