azathioprine + ciprofloxacin + metronidazole

This is a combination therapy consisting of three drugs—azathioprine, ciprofloxacin, and metronidazole—used primarily in the management of inflammatory bowel diseases such as Crohn’s disease, particularly for complications like perianal fistulas. - **Azathioprine** is an immunosuppressive antimetabolite that inhibits purine synthesis, thereby suppressing T and B lymphocyte proliferation. - **Ciprofloxacin** is a fluoroquinolone antibiotic that inhibits bacterial DNA gyrase and topoisomerase IV, leading to inhibition of bacterial DNA replication. - **Metronidazole** is a nitroimidazole antibiotic effective against anaerobic bacteria and protozoa; it disrupts DNA synthesis in susceptible organisms. The combination has been studied for its efficacy in inducing remission or improving symptoms in patients with active or refractory Crohn’s disease (including perianal fistulas) when monotherapy or other regimens are insufficient. Antibiotics (ciprofloxacin + metronidazole) may provide short-term benefit and serve as a bridge to azathioprine maintenance therapy[1][5][6]. This regimen should be used under specialist supervision due to potential drug interactions and adverse effects.