Should lisinopril be taken at night or in the morning?

No, this should be taken in the morning time. I would suggest with your morning meal. The above answer gives no evidence to support its assertion. The only scientific Lisinopril timing study I found indicated that 10PM dosing time was the most beneficial in lowering BP between the critical hours of 6 and 11 AM. This dosing time did not show any detrimental effects : http://www.europeanreview.org/articolo.php?id=262.