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X-ray showing autoinjector effectiveness

The rapid absorption of antidote following automatic injection is enhanced by the degree of tissue dispersion achieved by the autoinjector. The x-ray shows autoinjector doses (on left) compared to standard syringe intramuscular doses (on right). The autoinjector medication is obviously more efficiently diffused into surrounding muscle due to the force with which it is expelled from the injector (as seen in inset photo.) (Source: U.S. Army Soldier and Biological Chemical Command [SBCCOM]. Public domain.)