I'm a tad confused? So it is a norepinephrine uptaker but not a serotonin reuptaker? I thought that's what an NRI was?
And you can understand where people make the error. The drug bank states that:
(
http://www.drugbank.ca/cgi-bin/show_drug.cgi?CARD=APRD00028)
"
The analgesic properties of Tramadol can be attributed to norepinephrine and serotonin reuptake blockade in the CNS"
And even the wiki says:
Tramadol is somewhat pharmacologically similar to levorphanol (albeit with much lower μ-agonism), as both opioids are also NMDA-antagonists which also have SNRI activity
and
"It is recommended that patients physically dependent on pain killers take their medication regularly to prevent onset of withdrawal symptoms and this is particularly relevant to tramadol because of its SSRI and SNRI properties"
Also several quotes from one of the wikipedia citations you gave:
Tramadol also blocks 5-HT uptake
Similarly, the racemic mixture and (+)-enantiomer significantly slowed 5-HT uptake.
Am I right in thinking 5-HT is the name for serotonin? And does this not mean it is inhibiting uptake thus making it an SSRI?
Please could you explain in more detail? As from what I'm reading it seems to act as both a releasing agent and an uptake inhibitor.