From SuspireWiki

Lacrima (also mandrake tears) is an intoxicating and expensive drink derived from from the sap of ghouled plants (called mandragora). While its effects on Kindred are both pseudo-alcoholic and addictive, mortals find it a poison that deadens the senses. Lacrima made from plants ghouled by different clans of Kindred will have different effects.

For more information, read the Ghouls book.