Drug injection pens are single-use medical consumables manufactured by 療生公司. They allow individuals to quickly treat themselves and others with specific drugs to alleviate different symptoms. The different drug pens and their uses are listed below.
| Pen (drug) | Usage |
|---|---|
| 強心筆（地美沙群） | Reduces concussion symptoms, normalizes weapon handling and movement speed |
| 抗炎筆（甾原） | Reduces vision and hearing symptoms, normalizes stamina |
| 解毒筆（瑞舒吉拉） | Revives overdosed person (if not incapacitated), doubles decay rate of Blood Drug Level |
| 醫療筆（血紅扎） | Restores health and stops bleeding, recovers from incapacitated state |
| 止痛筆（咯沙芬） | Reduces pain symptoms, normalizes movement ability |