Toothwort ExtractConsumable 3
Source Pathfinder Lost Omens: Travel Guide
Price 9 gp
Weight light
Activate 
Trigger You use Quick Alchemy to craft an alchemical poison that's at least 1 level lower than your advanced alchemy level.
Originally used in dental procedures, toothwort numbs the gums by deadening nerves. When the oils are extracted and distilled, toothwort has a secondary reputation among alchemists for enhancing the duration of poisons. When adding toothwort extract to an alchemical poison, you can extend the maximum duration of the poison by 1 round.
Traits
Anything that doesn't list another rarity trait (uncommon, rare, or unique) automatically has the common trait. This rarity indicates that an ability, item, or spell is available to all players who meet the prerequisites for it. A creature of this rarity is generally known and can be summoned with the appropriate summon spell.
AlchemicalAlchemical items are powered by reactions of alchemical reagents. Alchemical items aren't magical and don't radiate a magical aura.
ConsumableAn item with this trait can be used only once. Unless stated otherwise, it's destroyed after activation. Consumable items include alchemical items and magical consumables such as scrolls and talismans. When a character creates consumable items, they can make them in batches of four.
AdditiveFeats with the additive trait allow you to spend actions to add special substances to bombs or elixirs. You can add only one additive to a single alchemical item, and attempting to add another spoils the item. You can typically use actions with the additive trait only when you're creating an infused alchemical item, and some can be used only with the Quick Alchemy action. The additive trait is always followed by a level, such as additive 2. An additive adds its level to the level of the alchemical item you're modifying; the result is the new level of the mixture. The mixture's item level must be no higher than your advanced alchemy level