((sorry.  Sharn, City of Towers, page 158.  Ithika's been carrying 2 doses since creation.  Equipment: Alchemical.  "Heartflow: this clear fluid is a powerful aphrodisiac, offered as an option at Firelight and bordellos of similar quality.  It primarily enhances sensation, but it also leaves the user vulnerable to seduction.  For three hours after using heartflow, a character receives a -3 penalty on saving throws against [...] and a -3 penalty on Sense Motive checks made to oppose Diplomacy or Bluff.  A character who receives a does of Heartflow without his knowledge or against his will can make a DC 15 Fortitude save to resist this effect.))