Skyrim: I can't get Wujeeta to activate the skooma dealer quest
After looking through multiple forums, I was unable to find anyone else who had this particular issue. That leads me to believe that this may be caused by one of the mods you have installed. Because of that, the easiest solution should be to use the following console command:
setstage FreeformRiften 20 10
This command should add the skooma dealer quest (named "The Raid") to your journal, as it was supposed to when you gave the potion to Wujeeta.