Oxyphenisatine is primarily used as a laxative to treat constipation. It works by stimulating the bowel muscles, increasing intestinal motility, and promoting bowel movements. It is often prescribed for short-term relief in cases of irregularity or to prepare for certain medical procedures requiring an empty bowel. However, its use has declined due to potential side effects and the availability of safer alternatives. It is important to use this chemical under medical supervision to avoid complications such as electrolyte imbalances or dependency.