Erythromycin Succinate is an antibiotic, it is a macrolide antibiotic. Erythromycin ethylsuccinate is an oral preparation of erythromycin, which is absorbed orally and broken down in the body to release erythromycin to play a role. Erythromycin ethylsuccinate’s antibacterial effect, antibacterial strength, and the range of antibacterial are the same as that of erythromycin. Erythromycin is a bacteriostatic agent that inhibits the growth and reproduction of bacteria by inhibiting the synthesis of bacterial proteins, and can also kill certain bacteria at high concentrations. Erythromycin is not only anti-bacterial, but also has an inhibitory effect on other pathogens such as certain spirochetes, mycoplasma and chlamydia. Erythromycin is mainly used to treat infections caused by sensitive bacteria and syphilis, as well as pneumonia, conjunctivitis and genitourinary tract infections caused by mycoplasma and chlamydia, and can also be used to prevent certain infections.