Metronidazole 250 mg is antibiotic drug effective against a wide range of bacterial and protozoal infections. The drug must not be taken without prescription as any antibiotic must be used only against susceptible types of bacteria to avoid the development of drug resistance. Patients guessing which drug will help with their symptoms provoke mutation of bacteria making them resistant to the drugs and thus making the treatment harder and riskier for patient’s health. As Metronidazole is well absorbed in stomach, the most popular way of administration of the drug is oral route. Pills are available in various dosages ensuring flexible regime of treatment: 250mg, 375mg (capsules), 500mg tablets.