Oil of taggit

A creature subjected to this poison must succeed on a DC 13 Constitution saving throw or become poisoned for 24 hours. The poisoned creature is unconscious. The creature wakes up if it takes damage.\n\n **_Contact._** Contact poison can be smeared on an object and remains potent until it is touched or washed off. A creature that touches contact poison with exposed skin suffers its effects.

Source: System Reference Document 5.1 · CC-BY-4.0 · 5th Edition 2014