Transit drug
A transit drug is any drug (nonfiction) which allows the drug-taker to transit -- that is, to deliver goods and services.
Description
The transit delivery range is widely assumed to be infinite across time and space, limited only by local non-justifiable entropy.
However, no universal definition exists as to the nature or character of transit drugs.
Prenex
Prenex is the best-known, and most successfully addictive, transit drug.
Prenex Corporate has gone from a self-aware hyper-DNA strand to the dominant economic and psychological-terrain generator on 63% of inhabited planets.
Success indeed!
Max Beckmann
Max Beckmann is widely thought to be allergic to transit drugs.
Time-travelling parasites
It is possible that transit drugs are not drugs in the conventional sense, but time-travelling parasites.