“Physostigmine, dimethyl-carbamate of hydroxy-phenylbenzyl-trimethylammonium (Nu-683) or di-isopropylfluorophosphate (DFP) suppress the paralyzing effects of procaine on synapses, on postsynaptic cardiac innervation and on neuro-muscular junctions, while procaine protects against most symptoms of intoxication induced by physostigmine, Nu-683 or DFP.”