A treating medical practitioner who makes medical decisions regarding the prescription and administration of medication for treatment of a mental illness has access to the relevant sections of a patient’s health records on past administration of medication at any facility, program, or treatment provider, if the patient lacks the capacity to authorize the release of records. Upon request of a treating medical practitioner under this section, a facility, program, or treatment provider shall supply complete information relating to the past records on administration of medication of a patient subject to this chapter. A patient who has the capacity to authorize the release of data retains the right to make decisions regarding access to medical records as provided by sections 144.291 to 144.298.