It hurts just as much as any injection, it's the "after" that hurts....the medication tends to leave the muscle sore for a while.
Most people I know it really doesn't bother them anymore so than any other shot. For me... I seem to have a reaction to them and it hurts and it swells up.
It won't hurt much. I am used to needles. I am insulin dependent plus I use the Victoza Pen insulin too .