The Phase IV clinical trials of the drug involve open-label studies with no control groups, but can also include small sample randomized controls. The purpose is to further investigate the safety and efficacy of the new drug.
In other words, the drug that Gao Yang obtained has hardly been used by anyone. Naturally, usage dosage, methods, and adverse reaction warnings won't be listed out. These details are only known by Butter Knife, who bears the responsibility of being a medic.
If you don't know anything, where would you dare to use the drug recklessly? While drugs save lives, they can just as swiftly end them. It's unclear whether the aerosol spray carried by Butter Knife is meant for all 24 people or just enough for two or three people. Use too little, and it might be ineffective; use too much, and it could be deadly, which wouldn't be surprising at all.
