There are 2 Narn drinks mentioned in the old "Dining on Babylon 5" book.
Taree (recipe in the book) is a ruby coloured wine flavoured with fruits and klga bark spice.. It is listed as the 7th most incapacitating drink on B5. It cauterizes your ulcers.
The other Narn drink mentioned is Kriul, listed as the 3rd most incapacitating drink on B5 with the comment "Use only as a disinfectant.
The book is listed as the human edition, goodness knows what effects these would have on other races, except the Narn who probably enjoy them.
No mention of how canon these are, but it gives you an idea.