From SuspireWiki

Not even the vampiric Embrace allows some undead to escape the embrace of drug addiction. Bearers of this blood suffer obsession with altered states, whether for themselves or by inflicting them upon others through the unique Nepenthe power.

Nickname: Pushers

Parent Clan: Daeva

Weakness: In addition to the Daeva weakness, when an Anvari feeds off of a mortal not under the influence of an opium based drug she only gains half the number of vitae she normally would.

You can find more about this bloodline in the Bloodlines: the Hidden book.