Hi Zydol tablets have tramadol in them but the difference between them is that Zydol is slow ( prolong) realise. It dosent give u instant kick and pain relief like tramadol, but because of that is less addictive. I have taken tramadol for years and because of long term usage I took more and more so doctor gave me Zydol instead to cool down. Zydol it's very diffrent, takes the pain away but u dont feel nice numbness in pain area and u dont get energy kick. Overall is better for long term use and as longest pain is not there I'm fine. Be careful with tramadol as it's very easy to become dependent from it.