|The following is based on information from Van Buren design documents and is not canon.|
If the player has established communication with Klik, and has the Pharmacist perk, he can offer to teach Klik how to make her own version of Rad-X using ingredients from the Reservation region and a science kit. Of course the player would have to give a science kit to Klik. Another main ingredient is cockroach guts.
Character type completion breakdown
- Combat Boy, Diplomacy Boy, Stealth Boy - If the player learned even the basic version of the Scaven Pickers' language, has a science kit, cockroach guts, and has the Pharmacist perk (or Science skill >100), then he will be able to teach Klik how to make a version of Rad-X.
- Science Boy - More suited to Science Boy since most of the prerequisites are already part of his "class."