Arka kalpana is a unique pharmaceutical preparation in Ayurveda which the volatile oil and active principles of drug are collected by process distillation using yantra or any convenient modern apparatus. Mukhapakahara arka formulation mentioned prakasha sapthama shataka as Gandusha yoga to cure Mukhapaka. The ingredients Jatheepatra, Amruta, Draksha, Vasa, Darvi, Hareetaki, Vibheetaki Amalaki. ...