Dashanga Lepa is a polyherbal preparation of Ayurveda, used to treat many skin ailments and rheumatoid arthritis. However, its toxicological property has not been reported so far. We report a rare case of cutaneous adverse reaction in the form of skin rash following the application of Dashanga Lepa. A 42-year-old female patient with a Pittakaphalaprakruthi (constitution) developed skin rashes, soon after the application of Dashanga Lepa over the applied area, which disappeared after stopping the suspected drug and starting treatment with Shatadhauta ghritha. The patient was again treated with the same formulation after a span of a month, which led to the reappearance of a similar type of rash. The temporal relationship, positive dechallenge, and rechallenge are strong associations between the event and formulation. No such reaction was noticed by any other patient with the suspected medicine.