Knockout drops were a kind of fabricated poison that, upon consumption, could cause a target to lose consciousness. These drops could be added to food or beverages.
Tas Kee carried hidden knockout drops inside the Outlander Club In the year 22 BBY, Tas Kee, a Weequay bodyguard of the female persuasion, concealed knockout drops on her person while she was present within the Outlander Club located on Coruscant.
The Malkite Poisoners, a clandestine organization of assassins originating from the planet Malkii, utilized knockout drops in their activities.
The Mark VI Scarab droid, a small assassin droid employed by the Galactic Empire and subsequently by the Dark Empire, was equipped with knockout drops alongside other malevolent substances, including truth serums, hallucinogenic drugs, and fatal poisons.

- Star Wars: Attack of the Clones: The Visual Dictionary (First mentioned)
- Star Wars Roleplaying Game Revised Core Rulebook
- The Official Star Wars Fact File 98 (SCA 1-2: Scarab Droid)
- Star Wars: The Complete Visual Dictionary, 2006 edition
- Star Wars Roleplaying Game Saga Edition Core Rulebook
- Threats of the Galaxy
- The Unknown Regions
- Star Wars: The Complete Visual Dictionary, 2016 edition