Duvadilan (Isoxsuprine HCL) is a prescription-strength medication used to treat circulatory problems in the legs and help increase circulation. It is commonly used to treat conditions such as varicose veins and chronic venous insufficiency. This medication can also be used to treat other conditions as determined by your doctor. Duvadilan is available in tablet form and can easily be purchased online from a trusted source. Take this medication as prescribed by your doctor to ensure maximum effectiveness.