Hi,
I had to undergo a 5/6 hour breath analyser test to determine what gases were being produced, an administered syrup was given during to see the reaction. All on an empty stomach after 6 hours of no food and only water up to 2 hours before.
Subsequently was given the choice of a funded prescription course of drugs or a top quality $1200 a pop course, which included a course of specialist prepared water soluble food. Pretty obvious which I opted for. Left a disgusting taste in the mouth for a week after, teaches me not to be so cheap, for next time.
Cheers