Metronidazole effervescent tablets, the main ingredient of which is metronidazole, can be used for anti-anaerobic bacteria, anti-trichomonas treatment, and pregnant women are prohibited. When the patient exists with vaginal trichomoniasis, bacterial vaginitis, often with the doctor to give the appropriate treatment, the product can play antibacterial activity, into the body will be subject to intracellular ion transporter protein, thus causing microbial death, to achieve the purpose of treatment of disease. Although metronidazole effervescent tablets are more effective in treating diseases, animal experiments have found that metronidazole drugs are toxic to the fetus, and there is a lack of adequate and rigorous controlled studies on pregnant and lactating women, therefore, pregnant and lactating women are prohibited. Pregnant women belong to a special group of people, the use of drugs should follow the doctor’s instructions, not blindly use drugs, so as not to have an impact on their own and fetal health.