(R)-Thalidomide is the R-enantiomer of Thalidomide, has sedative properties.

With the affinity of (R)-Thalidomide by the MIP present surface capture, that is more strongly than the other forms. In the case of (R)-Thalidomide, it is found to bind to the selective sites of the MIP more strongly than the other which reflects their different biological entities[1]. The (S)-Thalidomide imprints MIP nanoparticles exerted a greater cytotoxic effect on the caco-2 cells than the (R)-Thalidomide imprinted MIPs[1].

Effectiveness of oral thalidomide alone, and with intraperitoneal BCNU or cisplatin combination chemotherapy, is assessed after several weeks treatment. Both serum and tissue concentrations of (R)-thalidomide are 40-50% greater than those of (S)-thalidomide. Co-administration of BCNU or cisplatin with thalidomide did not alter the concentration enantioselectivity[1].