The Shriek, the Anaesthetic, and a Plain Warning

The famous legend that the mandrake shrieks when uprooted and kills whoever hears it, so that a dog was tied to the root to pull it up and die in the gatherer's place, is elaborated in classical and medieval sources from Theophrastus and Pliny onward, a story grown around a plant already thought half-human. Behind the magic is a real pharmacology: mandrake contains tropane alkaloids and was genuinely used in antiquity as a soporific and anaesthetic, Dioscorides describing its use to dull the pain of surgery. That same chemistry makes it dangerous. Mandrake is toxic, and its historical medicinal use is recorded here as history, not as advice; the plant can cause serious poisoning and is not safe to use.

The plant's association with a shriek that can kill outlived its medieval context by centuries, most recently supplying the basis for the screaming mandrake of the Harry Potter novels and films, a twenty-first-century popular retelling of a motif that Theophrastus and Pliny had already been recording as old lore some two thousand years earlier, a rare case of a piece of classical plant-lore passing essentially unbroken into mainstream modern fiction. The same class of tropane alkaloids found in mandrake, scopolamine among them, was extracted and used in early twentieth-century obstetrics for twilight sleep, a combination of scopolamine and morphine meant to dull the memory of childbirth pain, a documented and now abandoned medical practice descended from the same plant chemistry Dioscorides used as a surgical anaesthetic in antiquity.