Ok, off topic for just a second- Please ignore if you aren't interested.
Yes, I'm an Army surgeon.
Alcohol is a great antiseptic- it is the basis for Purell and other hand sanitizers, after all, as well as some great waterless surgical hand scrubs that have been shown to kill bacteria on the hands better than the traditional scrubbing.
However, the ER guy is correct that it will "kill" your own cells if used in an open wound. Primarily, this means killing the fibroblasts that your body is using to try and heal the wound, and inhibiting skin re-growth. It doesn't melt your flesh or anything dramatic like that. :-) Peroxide will also kill your fibroblasts and whatnot, which is why I always emphasize that my patients NOT clean their wounds with alcohol or peroxide. (But sometimes the foaming action of peroxide is helpful- as when cleaning wax or debris out of someone's ear.) The best thing for a new wound is debridement and irrigation with LOTS of sterile water; for a chronic wound- just soap and water. Maybe Dakins solution in some instances, or dilute iodine. Whether or not you should even try to suture a wound closed is a complex decision- believe it or not- that depends upon the mechanism of wounding, how clean the wound looks, where it is, how long it has been open, etc. Well, heck, I could go on and on about wound care…
But my patients aren't in the middle of a wilderness. (Well, actually, in my field sometimes they are. But you know what I mean.) In an emergency without access to a lot of very clean water I would accept the cytotoxicity and use either ethanol or peroxide if I had it, especially if used for just one initial cleaning on a minor wound. Debridement is still essential! I would NOT use either for daily cleansing of a chronic wound, because it would inhibit rapid healing by killing off your own "healing cells," as discussed. I certainly would never, for instance, keep a dressing constantly wetted with Everclear or anything like that! And I probably wouldn't use either on a very large wound like a crushed extremity or amputation, as that's just too much tissue to risk. And not on open fractures or joints! You don't want to risk killing someone's articular cartilage (?), or fibrose tendons into immobility.
And it goes without saying that some alcohols are toxic. Ethanol is probably the most benign.
Going through all of that has made me realize just how complex a question that was. I can come up with many odd situations where I would NOT want to use Everclear as an antiseptic. (And every so often someone will have a bad reaction to almost anything.) But for initial cleaning of small wounds- only involving skin, fat, or muscle- it is probably ok. I'm not going to try to define "small"- use your judgement. HYOH, and make your own responsible decisions.
My lawyer insists that I make a disclaimer about not providing medical advice over the internet, and all of the above is for entertainment purposed only. :-)