Adrenalin and Soma was a trade name for a chemical recipe to counter to fatigue and exhaustion, frequently employed by the crew of the Liberator. The chemical concoction could be injected, or imbibed as a beverage. As such, it was sometimes sold in bars across the Milky Way.
As the name implies, the chemicals involved were a stimulant and a tranquilizer. As such, the desired effects of the concoction depend upon the specific mixture of the chemicals within it -- which could be adjusted to produce desired results.
Adrenalin and Soma is derived from Blake's 7.