What is optrex hayfever relief 2% w v eye drops sodium cromoglicate 10ml these eye drops contain the active ingredient sodium cromoglicate 2% w v, an anti allergic medicine that helps prevent the release of histamine and other allergy‑triggering substances in the eyes. They are used to relieve hayfever‑related eye symptoms, including itchy eyes, watery eyes, redness, soreness and puffy eyelids. What are the key features soothing relief for itchy eyes affected by hayfever ingredients what are the active ingredients 1 ml of eye drops contains 20 mg of sodium cromoglicate 2.0% w v, other ingredients benzalkonium chloride, disodium edetate, water for injections ingredients usage how to use optrex hayfever relief 2% w v eye drops sodium cromoglicate 10ml read the enclosed leaflet before use. For the relief of eye symptoms of hayfever only, such as itching, redness, soreness and watering. Adults and children over 6 years gently squeeze 1 or 2 drops into each eye, 4 times daily. Usage warnings precautions to consider before using optrex hayfever relief 2% w v eye drops sodium cromoglicate 10ml see your doctor or pharmacist if there is no improvement after 2 days of use before using continuously for more than 14 days if your symptoms persist, consult your doctor. Do not exceed the stated dose use this medicine only in your eyes. Keep out of the sight and reach of children. Consult your doctor or pharmacist before using this product if you are pregnant, breastfeeding or if you require further information. Do not use if sensitive to any of the ingredients. Do not use whilst wearing soft contact lenses. Warnings