A Phenicol D is a prescription medicine having a combination of medicines that is used to treat bacterial infections of the eye or ear. It stops the growth of the bacteria. A Phenicol D is to be used only in the affected eye or ear in the dose and duration as advised by the doctor. Wash your hands before using this medicine. It is advised to check the label for directions before use. Do not skip any doses and finish the full course of treatment even if you feel better. Stopping the medicine too early may lead to the infection returning or worsening. The most common side effects include irritation and burning sensation at the application site. If these side effects persist for a longer duration, inform your doctor. In case by accident, this medicine goes into your nose or mouth, immediately rinse it with water. Inform your doctor if you are pregnant or breastfeeding or are allergic to this medicine or taking any other medication. It is advised not to drive or operate heavy machinery after use of this medicine in the eye as it may cause blurring of vision and may affect your ability to drive.