Erythromycin is a macrolide antibiotic of bacteriostatic action. In high concentrations and relatively high-sensitivity microorganisms may have a bactericidal effect.

Flagyl - antiprotozoan and antimicrobic drug. It is prescribed at treatment of protozoan inspections (abenteric amebiasis, including amoebic abscess of liver, an intestinal amebiasis, trichomoniasis, giardiasis, balanthidiasis, lambliasis, skin leushmaniosis, mecotic vaginitis, mecotic urethritis), pseudomembranous colitis, gastritises, ulcer, prevention of postoperative complications (especially interventions at segmented intestine, perirectal area, appendectomy, gynecologic operations).