No sides for me even at 5iu's. Just as a reference point, I recently had blood work done. I shot 5.2 iu's of Omnitrope and blood was drawn 4 hours later (had to wait longer than expected). My IGF level was 332 on a scale of 67 - 205.
My opinion only, you'll see good results at 2 iu's per day if you eat clean.
Hope this helps.
KB