Methods of treating diseases such as diabetes are disclosed. Methods of modulating elevated fructosamine levels, elevated HbAlc levels, impaired glucose tolerance, and impaired fasting glucose are also disclosed. In some embodiments, methods include co-administration of a bile acid sequestrant and two or more additional compounds selected from the group consisting of a biguanide, a sulfonylurea and insulin, or pharmaceutically acceptable salts thereof. Drug products including a bile acid sequestrant and two or more additional compounds selected from the group consisting of a biguanide, a sulfonylurea and insulin, or pharmaceutically acceptable salts thereof, in combination are also disclosed.
