Let's take a minute to talk about your medication. This is erythromycin eye ointment. It helps to treat eye infections cause by certain bacteria. It may have other uses, too. It is often applied to the affected eye or eyes several times each day. You should use it exactly as your doctor tells you to. Make sure to wash your hands before using this medicine. It is important to keep the tip of the bottle free from germs, so don't let it touch anything and keep the cap on between doses. If you have a hard time using your eye ointment, your doctor or pharmacist can help. Most people tolerate this medicine well. Common side effects include eye irritation, redness, and discomfort after use. Wait until your vision clears before performing tasks like operating machinery or driving. If these or other side effects become reasons you want to stop taking this medicine, please talk to your doctor or pharmacist. Make sure to finish the full course, or the infection could return and be hard to treat. As with any medicine, rare but more serious side effects can occur. With erythromycin, this includes allergic and severe eye reactions. You should read the Patient Information Sheet to know which symptoms to watch for and when to report changes. Erythromycin can interact with other medicines. You should always check with your doctor or pharmacist before taking or using other medicines. Women should check with their doctors before becoming pregnant and before breastfeeding. For best results, do not skip doses and store your bottle at room temperature away from moisture and heat.