The TTM (Traditional Tamil Medicine) known as Siddha medicine uses cardamom in many ways. The uses are mentioned in the form of verse more than 2000 years back. A rough translation will read like this:
"Disease in the throat, jaw and mouth
When you get upset due to bad breath
Flem in the throat, cough and dysuria
And shameful suffering due to spermattorrhoea
If you look for one which is good for the above
It is carminative Cardamom the stimulant you love"
(from the book on Herbs of Siddha Medicine-The first 3D book on herbs)