Yep, you heard me, OTC drops can actually cause eyes to become even more sensitive and with frequent use, can cause a rebound effect, wherein red-eye symptoms are temporarily masked, but return in full force requiring continual drop usage, and requiring continual drop purchases...funny how that works out, isn't it? 

Your savviest red-eye solution?  Making sure your hands are clean, and while cupping cold water, do a quick, but gentle eye bath, blinking several times to let water into your pupils.  Repeat a few times and if eyes are still red, follow up with an ice cold compress wrapped in a kitchen towel over eyes for 5 minutes twice a day and your blood shot eyes will disappear, the safe (and savvy) way!