Can you drink red cooking wine?

Generally, yes. There are two schools of thought. Let's look at them. One idea is that you shouldn't cook with something you wouldn't drink. Use the good stuff. The other idea is that there are a lot of "cheap" cooking wines, particularly some from the Pacific rim (China, Viet Nam and the like) that actually have warning labels on them regarding drinking them. (They say not to.) A little sip won't kill you, but the warning is aimed at another group. It's those who would purchase the very cheap wines to substitute them for other "more expensive" ones 'cause they drink a lot of alcohol and they want as much as they can get for as little cash as possible.