I was looking at my parents' pills the other day to see their imprint codes. (I'm currently taking a medical course and was curious.) I noticed that their hydrochlorothiazide didn't have any imprint codes on them and thought this was very weird. After seeing most of the HCTZ pills on this site have codes (I couldn't get through them all), I was wondering if there are, in fact, HCTZ pills without codes on them? (The pills in question are round and white with a line on one side in case they need to be cut in half.) We live in Canada too, if that makes any difference.