Regalian fleaspider

From Memory Alpha, the free Star Trek reference

Regalian fleaspiders are arachnids, whose venom can be used to synthesize a drug which improves a humanoid's blood circulation.

Julian Bashir asked Quark to import some fleaspiders for Kira Nerys in 2373. Quark also imported some illegal Regalian liquid crystals. (DS9: "The Ship")