What is causing red? What is the source of the redness? You may need antibiotic, steroids, glaucoma drops, or lubricant. See an ophthalmologist.
See your eye doctor. Better to see your eye doctor to determine the cause of the red eye prior to resorting to an over the counter (otc) drop for red eyes. You may require a prescription medication. In my opinion, there is no "best" otc drop for red eyes. When I see a patient that complains of red eyes and has been using an otc drop for red eyes, I generally cringe. Otc drops for red eyes in excess can get the red in.
Nevanac eye drops. Nevanac eye drops, naphcon a eye drops.