Fed up with itchy, red, watery eyes? Already tried other eye drops from the pharmacy? Optilast hay fever eye drops may be for you.Optilast contains an antihistamine called Azelastine which helps to treat and calm your symptoms associated with hay fever or other allergies.Typically allergies that affect the eye like hay fever will cause:Itchy eyesRed, sore eyesWatery eyesSlight sensitivity to lightOptilast allergy eye drops work in a similar way to antihistamine tablets. Allergies occur when our body overreacts to something it believes is a threat, in the UK Summer this is often pollen. But it could equally be other classic allergens like animal fur, dust or mould spores.Antihistamines work by preventing the histamine our body releases from binding to the histamine receptor in our cells. If the histamine cannot bind, then you don?t get classic allergy symptoms.??Optilast provides fast, long-lasting, targeted relief of your ocular symptoms with a reduction in symptoms within just 15-30 minutes of use.?Know that you are likely to be exposed to a particular allergen?? Make sure you use Optilast before you are exposed to prevent your troublesome allergy symptoms.If symptoms do not improve within 48 hours please sAllschoolabs with your GP.