Buy Tramadol online is used to treat moderate to severe pain. This medication is a synthetic opioid that works by binding to the mu-opioid receptor in the brain. This action results in pain relief by blocking pain signals from reaching the brain. Tramadol is available as both an oral tablet, an oral solution, and an extended-release oral tablet. The oral tablet and solution are typically taken every 4 to 6 hours as needed for pain relief.