It is also available in a liquid form, and patients recovering from surgery may receive it as an injection. Tramadol can be taken with or without food. When prescribed for chronic pain ...

Objective: To compare the 24-hour sustained efficacy and safety of a new tramadol once-daily formulation (tramadol OAD) using Contramid ® controlled-release technology with a marketed twice-daily ...

In 2014, tramadol was classified as a Schedule IV (or Schedule 4) controlled substance. Tramadol is an opioid medication with ...