Bloodhype By: Alan Dean Foster (Humanx Commonwealth Series #2)

Repler was a humanx-controlled planet, a minor outpost of the flourishing Commonwealth. It housed two of the most terrible threats ever to have faced the material universe.First was the Vom. A vast mass of liquid blackness, it had waited half a million years to be discovered. The wait was over.Second there was Bloodyhype, a killer drug with no known antidote. It caused instant addiction, followed by excruciatingly slow death.Flinx was a sanitation engineer, strictly on the sidelines. But his role in the affairs of the planet soon took on a more ominous aspect. Goodreads: 3.85 Paperback, 1973