Isodoped

Isodoped is one of the companion perks in Fallout 4.

Obtaining
To gain the perk, the Sole Survivor has to reach maximum affinity with Hancock.

Effects
The player character's Critical Hit value increases +20% faster, if the player character has 250 Radiation value. This equates to 25% of the player's maximum health being filled by radiation damage in order to activate the perk.

Behind the scenes
The name of this perk 'Isodoped' is a portmanteau, combining 'isotope' and 'doped'. This is in reference to Hancock's love of chems, and 'isotope' refers to radiation and Hancock's transformation into a ghoul.

Isodopado Изотопь