<p>Provided is a water-based paste containing diclofenac sodium, which is obtained by mixing a uniform mixed solution of diclofenac sodium wherein the mixture ratio of crotamiton/diclofenac sodium is 8.0 or less and the mixture ratio of (water + crotamiton)/diclofenac sodium is within a range of 3.0 to 20.0.</p>
