Med-X

Med-X is a highly potent painkiller which appears in Fallout 3 and Fallout: New Vegas. When injected, it makes the user impervious to pain to the degree that damage resistance is increased by 25% - this will last for 6 minutes, and 12 minutes with the Chemist perk.

Applications via Armour
Besides providing the benefits of regular armor, the prototype medic power armor, found in the sewers of Old Olney,and the Stealth suit will automatically dispense Med-X every 2.5 hours (game time) if the player's health drops below 33% or if a limb's health drops below 25%. While being administered through the Power Armour, an addiction to Med-X will not develop, however players using the Stealth Suit can become addicted to Med-X this way

Fallout: New Vegas
Restoring Hope: Med-X is needed for part of Restoring Hope by helping Dr. Alex Richards at the Camp Forlorn Hope medical center. To assist Dr. Richards with three patients in the clinic, the following are needed:
 * 1st Patient: Medicine Level 35 - or - Med-X (1), Surgical Tubing (1), and Whiskey (1).
 * 2nd Patient: Medicine Level 50 - or - Bonesaw (1), Med-X (1), and Medical Brace (1).
 * 3rd Patient: Medicine Level 75 - or - Med-X (1), Super Stimpak (1), and Tweezers (1).

Booted: While not part of the quest itself, the player has the option of giving Med-X to Boxcars, who gives you the Booted mission, Med-X for positive karma.

Behind the scenes
Originally, Med-X was named "morphine" in the game. However, on July 4, 2008, Fallout 3 was refused classification by the OFLC in Australia, thus making the game illegal for sale in the country due to the "realistic visual representations of drugs and their delivery method [bringing] the 'science-fiction' drugs in line with 'real-world' drugs." On September 9, 2008 Bethesda vice president of PR and marketing, Peter Hines, described the idea of the Australian version of Fallout 3 as a misconception, and said all versions of Fallout 3 will not include real world drug references. However, the name "morphine" is still used in the Japanese and Czech versions of the game.

Med-X Мед-X