Classicly

Reese whistled. The pack was brim-full of ampoules of benzolurethrimine, the pain-killing drug to which Kuhli had been made an addict. The alien had stumbled into the colony one day, his chest slashed open by the talons of a khaljek-bird; the colony doctor had administered the drug to ease his agony and only then discovered benzolurethrimine was a powerful narcotic for the aliens.