The Fast Drug is named because it makes the universe (to its user) appear to move much more quickly.  The drug slows down personal metabolism at a ratio of approximately 60 to 1. Fast drug takes effect immediately upon ingestion; one dose typically lasts for up to sixty days, making that time appear to be only one day.
The drug is administered via a dermal patch, attached directly to the skin of the patient. There are dosing regimens which last for shorter periods of time. In addition to the 60-day dose, there is a 30-day dose and one-week dose.
Users are extremely vulnerable because they are living at such a slow rate; but physical aging is also slowed, and the need for consumable supplies is reduced, thus allowing conservation of air and food.  This can be particularly useful when trapped on a ship without properly functional life support systems.
Many societies experiment with extremely low temperature baths to slow down metabolism and others artificially induce comas. By the TL:10-12 epoch, the fast drug has become ubiquitous and highly valued for survival or emergency applications. The Fast Drug Berth has become an alternative to Low Berths in some areas.