Drugs can be classified by chemical type or therapeutic use. For example, anti-infectives that are capable of killing pathogens or inhibiting their growth and reproduction can be categorized based on the type of organisms they target or their chemical structure. Drugs can be further categorized as prescription drugs, nonprescription drugs, or controlled substances. Prescription drugs, including antibiotics, necessitate supervision by a licensed healthcare provider to mitigate potential risks and ensure safe usage. The FDA deems nonprescription or OTC drugs safe when used as directed, eliminating the need for a prescription. OTC drugs are commonly used to alleviate symptoms of a cold, provide pain relief, or address digestive issues. Controlled substances, due to their abuse potential and dependency risks, are strictly monitored by the DEA and categorized into different schedules. Schedule I drugs have the highest abuse potential, lack accepted medical use and have the strictest regulation. Schedule II drugs, despite their high potential for abuse, are authorized for medical use under stringent regulations.