1'-Hydroxy Midazolam is primarily used in clinical and forensic toxicology as a biomarker for the detection of midazolam exposure. It is a major metabolite of midazolam, a benzodiazepine commonly used for sedation, anesthesia, and treatment of acute seizures. The presence of 1'-Hydroxy Midazolam in biological samples, such as blood or urine, helps confirm midazolam administration, which is critical in cases of drug monitoring, overdose investigations, or compliance checks. Additionally, it aids in distinguishing midazolam use from other benzodiazepines due to its specificity. This metabolite is also studied in pharmacokinetic research to understand midazolam metabolism and its interactions with other drugs, particularly in patients with impaired liver function, where metabolism may be altered.