Flagyl (metronidazole) works by disrupting the DNA of susceptible bacteria and parasites. This happens through a process involving nitroreductase enzymes.
- Nitroreductase Activation: Bacteria and parasites containing nitroreductase enzymes convert metronidazole into a cytotoxic compound. DNA Damage: This active metabolite damages DNA by binding to it and disrupting its structure. Inhibition of DNA synthesis: This DNA damage interferes with bacterial and parasitic DNA replication and repair, halting their growth and reproduction. Cell Death: The inability to repair damaged DNA leads to cell death.
The drug’s effectiveness depends on the presence of nitroreductase in the target organism. This explains why Flagyl is active against specific anaerobic bacteria and protozoa.
Anaerobic bacteria lack oxygen-dependent metabolic pathways, making them reliant on nitroreductase enzymes. Certain protozoa also possess these enzymes, making them susceptible to Flagyl.
Importantly, aerobic bacteria generally lack or have lower levels of nitroreductase, contributing to Flagyl’s selective toxicity.
Remember to consult your doctor or pharmacist for detailed information and appropriate dosage.
