Alfa Italy mepụtara Rifampicin (Rifaximin), ihe mgbakwasị ụkwụ nke rifamycin. A na-ere ya n'Italytali dị ka ọgwụ na-efe efe na-efe efe na 1987 ma ka na-ejikwa ya eme ihe na mba ofesi. SFDA kwadoro ya na 2004, ejirila ya na usoro ọgwụgwọ na China. Ọ bụ ọgwụ na-egbochi sịntetik nke rifamycin. O nwere ụdị antibacterial sara mbara na arụ ọrụ antibacterial siri ike. Ọ nwere ike ịmepụta ọnụọgụ ọbara dị elu na eriri afọ. Ọ nwere ike igbochi Staphylococcus aureus, Streptococcus faecalis na Salmonella na gram-positive aerobes, nke dị na genus Salmonella na Gram-negative aerobic bacteria. Shigella na Escherichia coli, Yersinia enterocolitica na Gram-positive anaerobic bacteria niile nwere ọrụ antibacterial dị elu. Usoro nke ime ihe ya bụ igbochi polymerase nje, igbochi usoro ntụgharị nke RNA, wee gbochie njikọ nke protein nje, si otú a na-ebelata mmepụta nke amonia. 1) ọrụ antibacterial siri ike, na ụdị antibacterial dị obosara. Ọ nwere mmetụta nke nje na ọtụtụ nje gram na nje na-adịghị mma gram (gụnyere nje aerobic na nje anaerobic), na nsonaazụ nje bacteria siri ike karịa nke gram-negative bacteria. 2) akụkụ eriri afọ anaghị etinye ya afọ, uche ya dịkwa oke elu na akụkụ eriri afọ. Ọ nwere ike igbu nje nke eriri afọ ma kpọọ nsonaazụ nje na-arụ ọrụ ngwa ngwa na mpaghara mpaghara, ọ dịghịkwa mkpa iji antispasmodic na ọgwụ adsorptive na njikọ nke eriri afọ.