A vial of Gunjack
Gunjack was a spice variant made of a highly concentrated methylpenatox and glucose based chemical cocktail. Consumption of Gunjack granted the user intense physical strength, but also decreased the user's fine motor control and the ability to reason.
Behind the scenes
Gunjack was a spice craftable by smugglers in Star Wars Galaxies: An Empire Divided. It was removed from the game along with most other spices with the "New Game Enhancements" in 2005.