antifogmatic: an alcoholic drink
Antifogmatics were popular in the nineteenth century. They were drinks taken "for medicinal purposes," on the pretext that they protected against the unhealthy effects of fog or other bad weather. Although the term antifogmatic was meant as a joke, people of the time did tend to feel that guzzling plain unadulterated water was bad for your health. (And before water treatment plants, who knows? They may have been right.)
Early Americans regarded liquor both as nourishment and as a tonic for whatever ailed you. Soldiers received daily rum or whiskey rations along with their bread and cheese as a dietary staple. Americans of the time knocked back nearly four gallons of hard liquor a year per capita, well over the amount that modern citizens consume.
For more on early American drinking habits, see cocktail, calibogus, and nimptopsical.