Rifampicin (Rifaximin), wani nau'ine ne na rifamycin, wanda Alfa Italia ta kirkira. An sayar da shi a cikin Italiya azaman maganin cutar gudawa a cikin 1987 kuma har yanzu ana amfani da shi ko'ina. SFDA ta amince da shi a cikin 2004, an yi amfani dashi a cikin aikin asibiti a kasar Sin. Magungunan antibacterial ne na semi-roba na rifamycin. Tana da fa'idar yaduwar kwayar cuta da aiki mai karfi. Zai iya samar da tarin jini mafi girma a cikin hanjin hanji. Zai iya hana Staphylococcus aureus, Streptococcus faecalis da Salmonella a cikin gram-tabbataccen aerobes, waɗanda suke na almara Salmonella a cikin Gram-negative aerobic bacteria. Shigella da Escherichia coli, Yersinia enterocolitica da Gram-tabbataccen kwayar cutar anaerobic duk suna da babban aikin antibacterial. Hanyar aikinta shine ta hana polymerase na kwayar cuta, toshe aikin kwafin RNA, sannan a hana kirkirar furotin na kwayan, don haka rage samar da ammoniya. 1) aikin antibacterial yana da karfi, kuma bakan antibacterial din yana da fadi. Yana da tasirin kwayar cuta akan mafi yawan kwayoyin gram-tabbatacce da ƙwayoyin gram-korau (gami da ƙwayoyin aerobic da anaerobic bacteria), kuma tasirin kwayar yana da ƙarfi fiye da na kwayoyin gram-negative. 2) ba ya shafan ciki ta hanyar hanji, kuma natsuwarsa tana da yawa a cikin hanjin hanji. Zai iya kashe cututtukan cututtukan hanji kuma ya yi wasa da tasirin kwayar cuta da sauri a yankin, kuma ba lallai ba ne a yi amfani da maganin antispasmodic da na talla a haɗe da yankin hanji.