Nepenthe

Nepenthe (νηπενθές, nēpenthés) is a possibly fictional medicine for sorrow – a "drug of forgetfulness" mentioned in ancient Greek literature and Greek mythology, depicted as originating in Egypt.

The carnivorous plant genus Nepenthes is named after the drug nepenthe.

In the Odyssey
The word nepenthe first appears in the fourth book of Homer's Odyssey:

Analysis
Figuratively, nepenthe means "that which chases away sorrow". Literally it means 'not-sorrow' or 'anti-sorrow': νη-, nē-, i.e. "not" (privative prefix), and πενθές, from πένθος, pénthos, i.e. "grief, sorrow, or mourning".

In the Odyssey, νηπενθές φάρμακον : nēpenthés phármakon (i.e. an anti-sorrow drug) is a magical potion given to Helen by Polydamna, the wife of the noble Egyptian Thon; it quells all sorrows with forgetfulness.