Globally, major burden on public health is posed by infectious diseases such as HIV, malaria, tuberculosis, hepatitis A, hepatitis C, hepatitis C and influenza. Infectious diseases are the major cause of death in the world. According to World Health Organization (WHO), globally 16% of deaths are resulted due to infectious diseases. Various pathogen microorganisms, such as parasites, virus, bacteria and fungi, cause infectious diseases. Poor sanitation and inadequate personal hygiene causes various infectious diseases. These diseases are transmitted through direct or indirect contact. Anti-infective drugs are used to prevent or destroy the growth of pathogens. Antibacterial, antiviral, antifungal and antiparacitic drugs are some of the anti- infective drugs used for the treatment of infectious diseases.