Used For Eye Infection How it works It works by stopping the growth of viruses on the front of your eyeball (cornea). Usage And Safety Dosage The usual dose is a 1 cm ribbon of ointment five times a day at approximately 4 hour intervals. Follow all directions given to you by your doctor and pharmacist carefully. Side Effects Rash, itching or hives on your skin , swelling of your face, lips, tongue or other parts of your body , shortness of breath, wheezing or trouble breathing , unexplained fever (high temperature) and feeling faint, especially when standing up , burning or irritation, photophobia/light sensitivity or feeling as if there is something in your eye , mild stinging in your eye straight after using aciclovir , swollen, runny eyes (conjunctivitis) , swollen, red, irritated, itchy eyelids (blepharitis). Drug Interactions Some medicines may affect the way others work. Your doctor or pharmacist will be able to tell you what to do when using aciclovir ophthalmic ointment with other medicines. Indication Aciclovir ophthalmic ointment is used for the treatment of herpes simplex virus infections of the eye. When not to Use Do not use aciclovir if you are allergic to aciclovir or valaciclovir or any of the other ingredients of this medicine. Precautions Precaution Talk to your doctor or pharmacist before using Zovirax if you wear contact lenses. Stop wearing them while using aciclovir. Warnings Warning 1 Your vision may be blurred for 5 to 10 minutes after applying aciclovir. Wait until you can see clearly again before driving or using any tools or machines. Warning 2 Talk to your doctor or pharmacist if you use too much aciclovir. Aciclovir eye ointment is for use in the eye, if you swallow any talk to your doctor or pharmacist. Warning 3 Do not use aciclovir ophthalmic ointment for longer than your doctor tells you. Additional Information Pregnancy category Always consult your physician before using any medicine. Storage (YES/NO) Store this medicine at room temperature, away from direct light and heat.