How to Make Fever Tonic in Kingdom Come Deliverance 2

In *Kingdom Come: Deliverance 2*'s main quest, "For Whom the Bell Tolls," Hans needs your help at Trosky Castle. A crucial step involves creating a Fever Tonic using alchemy. Here's how:

Kingdom Come Deliverance 2 Fever Tonic Recipe & Location

The Fever Tonic recipe resides within the Surgeon's Workshop in Trosky Castle. Access is gained in two ways: either by stealthily entering the workshop, or by convincing the Chamberlain you can create a digestive potion for him.

To avoid sneaking, complete "For Whom the Bell Tolls" objectives up to delivering the horseshoe. Return to the forge and speak with Cook Fanka. Offering help with her locked chest gains access to the noble's kitchen. Here, speak to the ailing Chamberlain, attempt skill checks to offer your aid, and gain access to the Surgeon's Workshop. Crafting a digestive potion alongside the Fever Tonic further solidifies your access, allowing you to meet Thomas.

Skill checks fail? Steal some food, exit the kitchen, and use the courtyard stairs to reach another kitchen door (guarded). Bribe the guard with the stolen food. Sneak upstairs to the Surgeon's Workshop; the journal containing the recipe is on the bookshelf.

How to Brew Fever Tonic

The surgeon's station already contains the necessary herbs. Follow these steps (referencing the Fever Tonic recipe in the journal):

1. Pour wine into the cauldron.
2. Add 3 handfuls of Feverfew.
3. Lower the heat and boil for 2 turns of the sandglass.
4. Grind a handful of Elderberry Leaves using the mortar and pestle.
5. Add the ground Elderberry Leaves.
6. Add 2 handfuls of Ginger.
7. Take a phial from the bottom-left shelf.
8. Distill the tonic using the Still.

Don't worry about failures; ample herbs are available, including those in the chest.

Having brewed the Fever Tonic (and potentially a digestive potion), proceed to find Thomas. If you have the Chamberlain's trust, return with both potions. Otherwise, use the noble's kitchen to sneak to the chapel and find Thomas and his sister, Adele. Speaking with Adele completes the quest.