- Star Trek: The Motion Picture
- Star Trek II: The Wrath of Khan
- Star Trek III: The Search for Spock
- Star Trek IV: The Voyage Home
- Star Trek V: The Final Frontier
- Star Trek VI: The Undiscovered Country
- Star Trek Generations
A poison known to Klingons and used by Duras' henchmen in the wine of Klingon leader K'mpec over several months so Duras can vie for his High Council seat. There is no known cure.