Procain is a local anesthetic. It allows minor procedures to be carried out without pain and distress in the eyes such as minor pain, itching or irritation. Procain is to be used only in the affected area in the dose and duration as advised by the doctor. To put this medicine into the eyes, hold the dropper close to the eye. Avoid touching the dropper. Squeeze the bottle gently to put the drops into the eyes. The most common side effects include temporary redness, stinging or 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 ears, nose or mouth, immediately rinse it with water. In case there is an open wound or the skin is dry, chapped or irritated in the eyes, do not use this medicine. Inform your doctor if you are pregnant or are allergic to this medicine or taking any other medication.