Weapon poison++

Weapon Poison++ is made by mixing cave nightshade and poison ivy berries in a vial of coconut milk, giving 190 Herblore experience. It requires level 82 Herblore. Applying a weapon poison++ will give you a chance to poison your opponent in combat. The poison effect lasts for 7 minutes. This potion has the same accuracy as Weapon poison and Weapon poison+.

Due to the low cost of Weapon poison, in comparison to its + and ++ versions, it is more cost effective in bossing setups.

Production costs
This table is based on the Grand Exchange prices of a vial of coconut milk, poison ivy berries and Belladonna seed (cave nightshade cannot be traded or sold on the Grand Exchange only be Farmed). It is accurate assuming the two items are bought from the Grand Exchange and the Weapon poison++ is sold afterwards.