Truth Serum

A creature subjected to Truth Serum must succeed on a DC 11 Constitution saving throw or have the Poisoned condition for 1 hour. The Poisoned creature can't knowingly communicate a lie.

Poison: Poison use is controversial or even illegal in many societies due to the often subtle and deadly nature of poisons. The price listed is for one dose of the poison. Check with your GM before purchasing poison to determine which poisons are allowed in your game.

Ingested: A creature must swallow an entire dose of ingested poison to suffer its effects. The dose can be delivered in food or a liquid. You might decide that a partial dose has a reduced effect, such as allowing advantage on the saving throw or dealing only half damage on a failed save.