Seizures
"My 11 year old son was given Keppra due to a dual concussion that lead to seizures in 4/2010. He hated the way it made him feel.  His neurologist put him on extended release Keppra which cause him to loose 30 pounds within a 3 month span.  He was rushed to the hospital due to high sugar - 564 dl.  In ICU, he was given Keppra at night, during his sleep,  his heart rate would slow down to 50 and set off the heart monitors all night. The cardiologist said there was nothing wrong with his heart after running numerous test.  The medication compromised his system, caused Type 1 diabetes and triggered irregular heart beats.  I weened him off Keppra against doctors wishes 10/2010.  He has had no seizures since, but still has Type I, he is 17 yrs ."