Try to AVOID BEING NERVOUS , have one or two drinks (no
more)30 minutes before a speech,AVOID COUGHING
When the mucus
is fresh (the first of a new bout of the problem) , the "eehmmm" works fine, the frog comes up, but straight away the vocal chords start producing a stronger batch.....and so on..
Try to "live with the Frog in your throat, that is the only it way it will go away naturally, always drink plenty of water anyway.