Cure Jarvis of Radscorpion Poison

Cure Jarvis of Radscorpion Poison is an unmarked quest in Fallout.

Quick walkthrough

 * Find a scorpion tail.
 * Take the scorpion tail to Razlo and ask him if he can make an antidote.
 * Open the curtain in the back of Razlo's hut and use the antidote on Jarvis for a gain of 400 experience.

Detailed walkthrough
This unmarked quest is very straightforward. First speak to Seth. He tells you that Jarvis, his brother, has been poisoned and that you can speak to Razlo for more information. Razlo is located in the building to the south. He will tell you that he can create an antidote to the venom, but he first requires the venom sac from a radscorpion, which is inside their tail.

As soon as you acquire a scorpion tail, bring it back to Razlo and he will create an antidote, in turn giving you a sample for personal use. You can then open the curtain to the back of his hut where Jarvis is laying on a mattress. Place a bottle of antidote in either of your inventory slots, and use the antidote on Jarvis for 400 experience points.


 * Regardless of you intelligence, you can still use antidote on Jarvis after obtaining it. However, if your Intelligence is less than or equal to three, you will not be able to learn of this quest from Seth. You must visit Jarvis in the back of Razlo's hut, and try to talk to him. Then, he will yield floating dialogue telling the player of his ailment, and that they should see Seth if they want help removing the radscorpion threat.

Locations of scorpion tails
Scorpion tails will be in the inventory of all radscorpions upon death; however, they are quite heavy, weighing 20 pounds apiece.


 * If you speak to Aradesh and agree to help his people by destroying the radscorpions, you will begin the quest Stop the Radscorpions. Speak to Seth about traveling to the caves.
 * Inside the cave you will find 9 radscorpions.
 * There are random encounters with radscorpions that can occur anywhere on the world map.
 * Radscorpions will spawn around the entrance to Vault 15 the first time you visit.

Rewards

 * Curing Jarvis rewards you 400 XP.