Chemist

Chemist is a perk in Fallout 3, Fallout: New Vegas, Fallout 4, Fallout 76 and Fallout: The Roleplaying Game.

Effects
This perk doubles the active time for chems.

List of items
The following items will work with this perk.

Bugs

 * Descriptions of items which include the item's duration are not updated to reflect the extended duration when the Chemist perk is taken. Examples of such items are RadAway, stimpaks and purified water.

Fallout 4
In addition to the Chemist perk affecting the duration of chems, ranks in Chemist are needed to unlock some recipes at the chemistry station usable in settlements.

Effects

 * 3rd and 4th ranks require 5 Intelligence as opposed to 7 due to a bug.

Fallout 76
Chemist only possesses a single rank, making it the most perk efficient crafting skill in Fallout 76. It no longer extends duration, that perk is instead called Chem Fiend.

Modifies
Doubles the yield when crafting chems. For items which are typically crafted in quantities of 2, crafting with Chemist equipped will yield 4. Chemist affects the following:

Fallout 2d20
Chems created last twice as long as normal. In addition, unlock chems recipes that have this perk as a requirement.

Gallery
Apotheker Químico Chimie Chemik Химик Хімік 药剂师