I don't know where the lot number is on the bottle. I am trying to find it. ## Hi Andrea, The following link by NIH has a detailed image of the product packaging (from 2013) for Turbersol that may offer some clues as to what the lot number is and where you might find it: dailymed.nlm.nih.gov/dailymed/drugInfo.cfm?setid=a4a732e9-b8ee-4e6d-8b9a-6a9d2c36bfcd Looking at the example packaging on that page, there are several sets of numbers / letters on the "box" (not bottle) depicting a reference to something… the one's I noticed immediately were written out as follows (but each in a different place on the box): 2028821 299 (L) C00L0T Barcode: 349281752216 0000000-299 I question whether the '(L)' may be referring to a lot number, seeing as it also says "L0T...