Possible Clues:

• Corn sugar
• Form of glucose
• Another word for glucose or grape sugar
• Isomer of glucose found in fruit and honey
• Naturally occurring sugar
• The prescribed amount may have more added in, but not a sweetener
• Glucose
• ... flower given to detective novelist, used to a certain extent as sweetener
• Former wife in diet ends increased sugar
• Form of sugar supplement briefly included in prescription