Definition of tush. : a long pointed tooth; especially : a horse's canine.
Common causes of low blood sugar include the following: 1  Overmedication with insulin or antidiabetic pills (for example, sulfonylurea drugs) 2  Use of medications such as beta blockers, pentamidine, and sulfamethoxazole and trimethoprim (Bactrim, Septra) 3  Use of alcohol.  Missed meals.
It may be dangerous when your blood sugar is very low because you could pass out or have convulsions if your brain is not receiving enough sugar to work properly. A low blood sugar reaction can happen when: 1  You take your medication, but don't eat on time. 2  You don't eat enough for the medication that you have taken.