  We evaluate the drag and diffusion coefficients of a hot hadronic medium
consisting of pions, nucleons, kaons and eta using open charm mesons as a
probe. The interaction of the probe with the hadronic matter has been treated
in the framework of effective field theory. It is observed that the magnitude
of both the transport coefficients are significant, indicating substantial
amount of interaction of the heavy mesons with the thermal hadronic system. The
results may have noticeable impact on the experimental observable like the
suppression of single electron spectra originating form the decays of heavy
mesons in nuclear collisions at relativistic energies.
