Khellin is primarily used in the treatment of certain medical conditions due to its vasodilatory and bronchodilatory properties. It has been historically employed to alleviate symptoms of angina pectoris by improving blood flow to the heart. Additionally, khellin is utilized in the management of asthma and other respiratory disorders, as it helps to relax the smooth muscles of the airways, facilitating easier breathing. Its anti-inflammatory effects also make it beneficial in treating skin conditions like vitiligo, where it aids in repigmentation of the skin. Furthermore, khellin has been explored for its potential in cancer therapy due to its ability to induce apoptosis in certain cancer cells.