Smylex

Smylex was Joker's codename for any of his poisoned products that, when paired in specific combination, would cause their victims to begin laughing uncontrollably, and then fall down, with their facial muscles pulled taut in a rictus grin. It could also be processed in a gaseous state.

Known victims

 * Becky Narita
 * Smylex commercial victim
 * Smylex poisoned punk

Behind the scenes

 * Based on comics' "Joker Venom", and any other alias for the poison that left the Joker's victims with a postmortem rictus grin.

Appearances

 * Batman

See

 * Joker Venom