I would guess that the reflux had a greater effect on your tooth decay than the cough drops.
I'm so scared. Yikes. I feel like I've tried everything short of surgery for my reflux. Although I've been on a PPI (a doc just switched me to an H2-class reflux med a few days ago, for whatever reason, so I'll try that for a bit) since I started taking the cough drops, so I'm guessing that that's been sucessfully raising the pH of my stomach, even if it hasn't done much else.
A possible partial solution, as far as your teeth go, would be to start chewing gum. Xylitol gum may be particularly effective, but failing that, sugar free gum is good. Chewing helps rinse your mouth with saliva (clearing reflux off of your teeth), keeps your mouth hydrated (dry mouth often accompanies reflux and is not good for oral hygiene), and helps control pH.
Googling will easily find more information, including less technical information if desired.
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