How to use Erythromycin Ointment. To apply eye ointment, wash your hands first. To avoid contamination, be careful not to touch the tip of the tube or let it touch your eye, eyelid, or any other. Pink Eye Antibiotics Antibiotics are used to treat the bacterial form of pink eye (conjunctivitis). They may be in the form of eye drops or an ointment. Because pink eye is contagious, they can be easily passed back and forth between your eyes and others. According to some experts, for treatments, erythromycin can be used to treat pink eyes. By using it, it can just relieve the redness, even the bloodshot eyes will disappear. Also, you need to use the drops as directed you need to make sure the bottles tip is not touching your eye to not be. Quick, meaningful answers from top Doctors: Dr. Bensinger discusses pink eye, the same disease as the common cold virus, and how quickly symptoms disappear with erythromycin ointment. Quick, meaningful answers from top Doctors: Dr. Bensinger discusses pink eye, the same disease as the common cold virus, and how quickly symptoms disappear with erythromycin ointment. I have pink eye and the doctor gave me erythromycin ointment which I’ve been using for three days, but it is still red. How long does it take before it starts c To keep the medicine as germ-free as possible, do not touch the applicator tip to any surface (including the eye). After using erythromycin eye ointment, wipe the tip of the ointment tube with a clean tissue and keep the tube tightly closed. Erythromycin Ophthalmic Ointment belongs to the macrolide group of antibiotics. It is basic and readily forms a salt when combined with an acid. Erythromycin ophthalmic will not treat a viral or fungal eye infection. Store at room temperature away from moisture and heat. Keep the tube tightly closed when not in use. Ointments as used to treat many eye conditions. Erythromycin ophthalmic ointment is an antibiotic that comes in a small tube. Your doctor will give instructions on how much and how long to use the medication to help prevent a recurrence of the underlying condition. One of the most common uses of Erythromycin ophthalmic will not treat a viral or fungal eye infection. Store at room temperature away from moisture and heat. Keep the tube tightly closed when not in use.