Jet Jet is a highly addictive drug first synthesized by Myron . It is extracted from brahmin dung fumes and administered via an inhaler . Background . < section begin = " Background " / > When Myron first encountered the Mordinos , they were farming peyote cacti and selling it to tourists as the " Reno Experience . " Unfortunately , as Myron explains , trips last too long , and profit is generated by fast turnaround and a high addiction rate . Furthermore , the climate was far too ravaged and irradiated to grow anything but the hardiest of plants . So , Myron began delving into growing mushrooms . Hallucinogens have low overhead and thrive in plentiful brahmin dung . From there , Myron began experimenting with derivatives of , and . However , the Mordinos still desired something a little harder and more addictive that could aid them in gaining control of Redding . The solution to the problem came from the brahmin fertilizer itself ; Myron discovered that the slaves harvesting the drugs were in a constant state of intoxication from inhaling the fumes . In the pre - War days , big meat companies had experimented with a cheap protein extract for growing food . However , the product had to be abandoned due to contamination from a skin bacterium , which caused it to act like an when ingested . By the time this was discovered , tons of the material were irreversibly contaminated , and rather than destroy it , the meat companies fed it to their cattle in an attempt to recoup their losses - these cattle were the ancestors of the post - apocalyptic brahmin . After exposing slaves to vats of brahmin dung sans the plants they had been cultivating , Myron realized that not only had the intoxicating properties of the protein extract been preserved in brahmin tissues , one did not need to slaughter the brahmin to harvest it - Myron was able to develop a process to refine it from their waste , thus providing the Mordinos with the cheap , addictive and fast - acting drug they had been in search of since they had entered the trade . About a hundred slaves were killed in initial testing — mostly results of heart attacks , cerebral hemorrhages , and psychotic episodes — but Myron was ultimately successful in producing jet . Thanks to Myron and jet , the Mordino family were able to build their drug empire . Grateful , they supplied their boy - genius with anything he wanted , usually whores and drugs . The Stables research team would further Myron ' s work , hoping to create a stronger and even more potent version , codenamed " jet beta " . However , the results were unsuccessful , as they could not quite get the kinks out ( e . g . , nasal bleeding , hallucinations , heart attacks ) . But they did increase the duration of its high - from 15 to 60 minutes . Myron would die less than a year after the Chosen One defeated the Enclave , somewhat ironically stabbed to death by a jet addict while drinking in a bar at the Den . While no one would remember Myron ' s name - let alone that he had created jet - his creation would live on , even spreading as far as the Capital Wasteland , where Murphy would attempt to produce an even more potent version , named ultrajet , designed for use by ghouls , who are barely affected by standard jet . Meanwhile , in the Mojave Wasteland , some of the more scientifically enlightened learned about the secrets of ultrajet and sought to make it themselves , and home chemists developed a potent form of jet called rocket . < section end = " Background " / > Surprisingly , rocket was one of few drugs that is not known to the Great Khans , who have the drug trade in a stranglehold . Contradictions . While it is stated that Myron was the first person to create Jet , information revealed in later installments of the series now contradict this . Mrs . Bishop says that she got hooked on Jet by John Bishop ( before they got married ) and for that she got kicked out of Vault City , which would require Jet to be much older than Myron is . According to Chris Avellone , what Mrs . Bishop says is a mistake and is not canon . It is more likely that Bishop got her hooked on some other drug . Consistent use of Jet would have muddled Mrs . Bishop ' s perceptions in any case . In " Fallout 3 " , Jet can randomly be found in containers located in sealed Vaults . Although as mentioned , some vaults sent people to trade with nearby settlements , so the jet could have come from outside vendors . Old Lady Palmer from Vault 101 used to lead such explorations , as seen in a file in the Overseer ' s terminal . However this explanation is very unlikely in vaults where the residents died or were killed by their experiment and the vault remained sealed thus the only remaining explanation for the Jet ' s placement can be attributed to the game ' s random loot generation . In " Fallout 4 " , in the Vault - Tec Regional HQ , a pre - War log found on a terminal talks about Psycho and Jet being sent to Vault 95 during its construction , nearly 164 years before its invention . In addition , Jet can also be found lying beside some pre - War skeletons and within certain book return terminals . While most characters say it has a near - 100 % addiction rate , for the Chosen One the rate is only 50 % in " Fallout 2 " , and only 20 % in " Fallout 3 " and " Fallout : New Vegas " . Variants . Jet . < section begin = " Jet " / > This is the most common and basic form of jet , which all other variations are based on . < section end = " Jet " / > Ultrajet . < section begin = " Ultrajet " / > This more powerful variant of jet was first seen in the Capital Wasteland , created by a ghoul named Murphy . He created ultrajet by combining jet , Sugar Bombs , and Abraxo cleaner . Later , in the Mojave Wasteland , ultrajet is found being sold by NCR Sergeant Daniel Contreras , the only known source in the entire area . How he obtained it remains a mystery . Ultrajet is also available in the Commonwealth . Ultrajet is harder to get addicted to than standard jet , but the addiction to it is permanent , should someone abuse it too much . < section end = " Ultrajet " / > Rocket . < section begin = " Rocket " / > This variant of jet is currently only known to be present in the Mojave Wasteland . Made by mixing jet with Nuka - Cola and detergent , the product provides a greater energy rush due to the refinement . < section end = " Rocket " / > Jet Fuel . Jet Fuel is a variation of jet which is the result of combining regular jet with flamer fuel . It is currently only known to be present in the Commonwealth .