Tryptophan-lysine distillate or TLD was a drug used for the treatment for a flu virus that was acquired on Nasreldine.
According to Doctor Katherine Pulaski, tryptophan-lysine distillate worked well with a generous dose of Pulaski's chicken soup. (TNG: "The Icarus Factor")
" TRIP-toe-fane LIE-zeen" was the pronunciation for this drug's name from the script pronunciation guide. [1]