contains too much of a certain drug but don't know which.
It is known as lettuce opium because of its putative sedative and analgesic properties.
Remember the Peter Rabbit stories? The Tale of the Flopsy Bunnies?
It is said that the effect of eating too much lettuce is “soporific.”
I have never felt sleepy after eating lettuces; but then I am not a rabbit
MI5 warns of right wing opinion shifting from anti-migrant opinion to terrorism
