The practice of chemically sedating people in institutional settings is, in the better ones, informally banned because sedatives are almost impossible to dose correctly without an anesthesiologist and there's a high risk of death. So just some random fucking cop is, of course, is not qualified.
Associated Press report on dozens of deaths after police injected sedatives into restrained people:
Dozens of deaths reveal risks of injecting sedatives into people restrained by police
An investigation led by The Associated Press has found that the practice of giving sedatives to people detained by police has spread quietly across the nation over the last 15 years, built on question...
apnews.com