As one of the Followers, Luria makes regular visits to the Followers safehouse northwest of New Vegas to keep the supplies there furnished for any Follower that needs them. She also offers many medical supplies, including stimpaks, super stimpaks, Rad-X, and RadAway.
PCPlaystation 3Xbox 360 She may just stand still with her eyes closed. If you try to speak with her it will say that she is unconscious. On PC, killing and resurrecting her can solve this.[verified]
Leaving the safehouse and coming back may solve this.
Playstation 3 If the player has updated their game into new versions and created a new game, Doctor Luria or any other Safehouse keepers will not show up. Removing and re-installing the patches may fix this. [verified]