Jamieson, Fausset and Brown on Leviticus 10:8-11

8-11. Do not drink wine nor strong drink--This prohibition, and the accompanying admonitions, following immediately the occurrence of so fatal a catastrophe [Le 10:1, 2], has given rise to an opinion entertained by many, that the two disobedient priests were under the influence of intoxication when they committed the offense which was expiated only by their lives. But such an idea, though the presumption is in its favor, is nothing more than conjecture.