Dulane M 20 Capsule is used to treat neuropathic pain. It contains Duloxetine and Mecobalamin which help rejuvenate and protect damaged nerve cells by producing myelin. In some cases, this medicine may cause side effects such as nausea, constipation, headache, drowsiness, dry mouth, difficulty sleeping, and low sexual desire. Before taking this medicine, inform the doctor if you are pregnant or breastfeeding, taking any other medication, or have any pre-existing medical conditions.