Chemist

Chemist is a Fallout 3, Fallout: New Vegas and Fallout 4 perk.

Effects
This perk doubles the active time for chems.

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

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 Bench usable in settlements.

Effects
Your PIP Boy will show the enhanced duration of chems, though when viewing items in e.g. the crafting interface you will still see the default chem duration. *3rd and 4th ranks require 5 Intelligence as opposed to 7 due to a bug.

Chemik Химик Apotheker