We don't have synonyms for rifampicins yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are rifampicin, rifamycins and rifampins.
(n) :
(pharmacology) A reddish-brown semisynthetic antibiotic C₄₃H₅₈N₄O₁₂ obtained from the bacterium Amycolaptosis mediterranei, used chiefly to treat tuberculosis, leprosy, and asymptomatic carriers of meningococci.
(n) :
(pharmacology) A reddish-brown semisynthetic antibiotic C₄₃H₅₈N₄O₁₂ obtained from the bacterium Amycolaptosis mediterranei, used chiefly to treat tuberculosis, leprosy, and asymptomatic carriers of meningococci.