philtrum,, i, n., = φίλτρον,
a love-potion , philter (poet.; only in plur.), Ov. A. A. 2, 105: philtra Thessala vendere, Juv. 6, 611.
philtrum ī, n , φίλτρον, a love-potion, O., Iu. ...
An Elementary Latin Dictionary