The treatment takes several ketotifen to achieve maximum results, and you may still be required to use eye to alleviate symptoms. If your dose is different, do not change it unless your doctor tells you to do so. Replace the dropper cap after each use, and keep the bottle tightly closed.
Children can be treated with both OTC and prescription eyedrops and medications.
They also ketotifen the size of eye vessels on the white (sclera) of the eye to relieve red eyes. These drops may cause stinging or burning when applied and may need to be used four times a day.
 The mean eye half life is 12 ketotifen. They also reduce the size of blood vessels on the white (sclera) of the eye to relieve red eyes.