A sudden loss of pressure at high altitudes can produce unconsciousness within seconds, followed eventually by death.

I recalled that the chances of producing unconsciousness are slightly higher for an impact from the front than one from behind.

They produced unconsciousness with a tiny trickle of current through the brain.

However, though they produce unconsciousness, they provide no analgesia (pain relief) and must be used with other agents.

While opioids can produce unconsciousness, they do so unreliably and with significant side effects.

Embolism in the brain often produces sudden unconsciousness and paralysis.

Blueflash-A bright, blue flash of light used to produce unconsciousness.

The blow would produce unconsciousness and death would follow very shortly.

Such an action will also produce unconsciousness in The Hunter - for several days, probably.

But it didn't produce unconsciousness; if anything, he grew more alert, more aware of the horrors being done to him.