Hi, I am a diabetic (type 2) for the last 10 years, 2 years ago I was diagnosed with diabetic neuropathy and was given Pregeb tablets (1 tab, twice a day), but the tingling on my feet and the lower back pain remains. I have now been advised by a friend with similar symptoms to try Neurobion Plus, I would like to know when to take the tablet, before or after meals? For my diabetes, I take Istamet (sitagliptin phosphate& metformin hydrochloride) which has little or no effect, any advice on that too? Thanks so much.