Debutyldronedarone hydrochloride is primarily utilized in the development of antiarrhythmic medications. It serves as a key intermediate in the synthesis of dronedarone, a drug used to treat atrial fibrillation and atrial flutter. By contributing to the production of dronedarone, it helps in regulating abnormal heart rhythms, improving patient outcomes in cardiovascular health. Its role in pharmaceutical manufacturing underscores its importance in creating effective therapies for heart rhythm disorders.