Intrathecal treatment with sigma-1 receptor antagonists reduces formalin-induced phosphorylation of NMDA receptor subunit 1 and the second phase of formalin test in mice.
Br J Pharmacol 148, 490-498, (2006). Kim, H. W., Kwon, Y. B., Roh, D. H., Yoon, S. Y., Han, H. J., Beitz, A. J., et al. View abstract in PubMed