MedlinePlus: Cholestyramine (Oral): Provides information on usage, precautions, side effects and brand names when available. Data provided by various government agencies and health-related organizations.MedlinePlus: Cholestyramine Resin: Provides information on usage, precautions, side effects and brand names when available. Data provided by various government agencies and health-related organizations.Questran: Full prescribing information from RxList.