Tramadol 100 mg is a pain relief medicine that one can easily buy online. It has a unique dual-action mechanism for acting as an opioid, modulating the brain chemicals like serotonin and norepinephrine, and thus effectively treating moderate to severe physical and nerve pains. Tramadol 100 mg is available in extended-release forms so that it can maintain consistent pain management throughout the day. However, due to the potency of this drug, one has to be under the prescription of a health provider to ensure safety and effectiveness when using Tramadol 100 mg.