I didn't read all the comments But what happens is that alcohol containing sugar, with Will higher your bs. But when the lever then breaking down the alcohol (which is à poison) the lever can't give you any glucose during the night as i normally does. That's why the bs may drop during the night. My bs is often up to 20-25 when i drink, and even if i don't ever take any insulin then, My bs goes down to 2 or 3 during the night st least 1 time