Codeine phosphate is widely used in the medical field as an analgesic to relieve mild to moderate pain. It is often prescribed in combination with other medications, such as acetaminophen or aspirin, to enhance its pain-relieving effects. Additionally, it is utilized as an antitussive to suppress coughing, particularly in cases where a dry, persistent cough is present. Due to its opioid nature, it is effective in managing pain post-surgery or injury, as well as in chronic conditions like arthritis. However, its use is carefully monitored due to the potential for dependence and side effects such as drowsiness, constipation, and respiratory depression. It is also commonly found in prescription cough syrups to provide relief from severe coughs.