Loewi, Otto (1873–1961)
![Otto Loewi](../../images2/Loewi.jpg)
Otto Loewi was a German-born American pharmacologist and medical researcher. He shared the 1936 Nobel Prize in Physiology or Medicine, with Henry Dale, for discovering a chemical substance (later shown by Dale to be acetylcholine) mediated the transmission of nerve impulses from one neuron to another.