Topical formulations to treat skin conditions, such as psoriasis, are provided in which a polymer conjugate of an indolocarbazole exhibits reduced systemic exposure. An example formulation includes the TrkA antagonist, SNA-120, together with a preservative/antioxidant, a preservative/solvent, a solvent, a solvent/moisturizing agent, a stiffening agent, and one or more emollients/emulsifying agents.