Tramadol 100mg online is used to help relieve moderate to moderately severe pain. Tramadol is similar to opioid analgesics. It works in the brain to change how your body feels and responds to pain. Tramadol 100mg Tablet SR can be taken with or without food. In general, you should try to use the smallest amount necessary to control your symptoms, for the shortest possible time. You should take this medicine regularly while you need it. Try not to miss doses as this will make the medicine less effective. Do not take extra doses of the extended-release tablets.