Metronidazole is a medicine used to treat different types of bacterial and parasitic infections, including those that affect the skin, vagina, blood, heart, bone, stomach, liver, joints, nervous system, respiratory tract, and other areas of the body. This medicine is also prescribed to treat sexually transmitted diseases (STDs). The extended-release form of metronidazole is used to treat bacterial vaginosis (an infection caused by too much harmful bacteria in the vagina) in women.(What is Metronidazole Drug / मेट्रोनिडाजोल के फायदे और नुकसान in Hindi) 

Metronidazole is in a class of drugs called nitroimidazole antimicrobials. It works by stopping the growth of bacteria. This medicine will only help infections caused by bacteria and will not work for the common cold, flu, or other viral infections.