Medication prescription is more complicated than in the past with an increasing number of issues, such as microbial resistance to prescribed antibiotics, drug interactions and increased number of medications used by both adult and pediatric patients. The widespread use of antibiotics has allowed common bacteria to develop resistance to the drugs that were once effective in controlling the infection. Adults and children are prescribed drugs to manage an increasing number of medical, physical and psychologic conditions, many which interact with each other or produce side effects that require additional medications. The administration of drugs to pediatric patients is further complicated by the necessity to adjust the dosages of medications to accommodate their lower weight and body size. Dentists prescribe several categories of medications to manage a variety of diseases and conditions associated with the oral cavity. Among these conditions are bacterial, fungal and viral infections, pain, and caries prevention.