Poppa pack
The Ninth Doctor discovered the use of poppa packs when he went back with Rose to Neanderthal times and discovered a group of humans from the future using them (prose:Only Human).
Poppa packs contained many types of drugs to help many illnesses and sickness, however the drugs could not stop death (prose: Only Human). The poppa packs could be refilled and had a number plate on it so they were able to select which combo of drug they wanted (prose: Only Human)
People who wouldn't use poppa packs and thought they were wrong were called Refusers. However, although they wouldn't use poppa packs they would still use other drugs. For Example, drugs that would stop them needing the toilet (prose: Only Human)
Poppa packs had a side effect on humans. Poppa packs would stop them thinking properly and would leave them not self aware thus thinking everything is fine (prose: Only Human).