From Happypreppers.com:
#2: Ammonia Inhalant (smelling salts). Ammonia Inhalant, pictured right, is a modern day version of "smelling salts." It's intended as a product to arouse patients who've fainted. An often overlooked prep, you will be happy to know you can revive someone to save their life with a swift measure of ammonia inhalant.
(not to pick on the happyprepper people - I'm sure they're lovely. This advice can also be found on... shtfandgo.com and and many other places.)
Anyone who has worked in EMS, Fire, or ERs has seen the magic of ammonia inhalants. The lifeless blob on the ground or stretcher soon becomes animated and combative. Sometimes, one even will break two capsules and put one up each nostril. Then something like this happens:
Patient is revived and is shipped back in short order to whence they came.
However, this only works on people who are faking passing out. It provides a stimulus so noxious that you can't ignore it, no matter how hard you are pretending. If you are having a seizure or a stroke or some other terrible medical problem that alters your level consciousness, the ammonia doesn't do anything.
If you are envisioning a future where you are going to spend your time and energy distinguishing between the people who have fake passed out from people who have real passed out, then get yourself a Costco sized box of ammonia. Otherwise, save your hard-earned Steam and up vote this post!
BeriBeri Quite Contrary * Faking Awake * Busywork Boss * Chicken Herder * Mathamatrix