You see this here? THIS is the result of using too many Z-Packs. Once you become addicted, your hunger for them becomes insatiable. You can feel his eyes desperately searching for the next Z-Pack to consume and, ultimately, become ever more crazed and hungry for the almighty Z-Pack.
"Where is my Z-Pack?" A phrase often heard amongst those who are under its life-rending symptoms. Yet little can be done to satiate their hunger except give them MORE Z-Packs. More of them in the, perhaps futile, hopes that they will one day overdose and have their immune systems completely shut down.
Until that day comes for this particularly unfortunate fellow, however, we can only watch in despair as he himself falls further into despair, creating the vicious cycle that is the Z-Pack Addiction.