Sneeze Me, Squeeze Me, Please Me! Shampoo's Recipe For Disaster
Kushami Ippatsu Aishite Naito
"Shampoo presents Ranma with a pork bun infused with a mystic herb called "Kai-rai-shi," which makes him obey the first command he hears. Ranma eats the pork bun, but Akane gets pulled into the situation, and things take a surprising turn... " (source)