Signs Of Vicodin Abuse If One Is On Vicodin, Do The Pupils Of The Eyes Get Bigger Or Smaller?

If one is on Vicodin, do the pupils of the eyes get bigger or smaller? - signs of vicodin abuse

I am concerned I am happy about my friend. You can become addicted to Vicodin. He said he stopped. What signs do I look? "Expand the apple in his eyes?

Thank you in advance.