The term "knockout pill" refers to a drug or medication that can induce sleep or unconsciousness in a person. However, there are certain antonyms that can be used to describe the opposite effects. These antonyms include rejuvenating, stimulating, energizing, reviving, refreshing, activating, invigorating, and awakening. These words signify a state of arousal, alertness, and wakefulness. Instead of inducing sleep, these words imply an increase in energy, productivity, and mental clarity. While knockout pills may have their medical uses, it is important to also recognize the benefits of wakefulness and productivity in our daily lives.