Verntal 4 Eye Drop is a medicine used to treat allergic eye diseases. It helps provide relief from allergy symptoms such as inflammation (redness and swelling), itchiness, and watery eyes. Verntal 4 Eye Drop is for external use only. Follow the instructions given by your doctor and use this medicine regularly to get the most benefit. You should gently squeeze the dropper and place the medicine inside the lower eyelid and wipe off extra liquid. Always wash your hands and do not touch the end of the dropper. This could infect your eye. Make sure you remove contact lenses if you wear them and wait for at least 15 minutes before putting them back. Never use a bottle if the seal is broken before you use it for the first time. It is generally safe to use, but you might experience a stinging sensation on application. If these bother you or you experience any other side effects, let your doctor know. There may be ways of reducing or preventing them. Do not use this medicine, if you have an eye problem (glaucoma) and untreated eye infection. Your doctor should also know about all other medicines you are taking as many of these may make this medicine less effective or change the way it works. This medicine is usually not safe to take during pregnancy and breastfeeding, ask from the doctor if required.