METHODS OF TREATING LIVER DISORDERS OR LIPID DISORDERS WITH A THR-BETA AGONIST

1 - 17 . (canceled)

18 . A method of treating nonalcoholic steatohepatitis in a subject in need thereof, the method comprising:

(a) performing a first biomarker test on a first biological sample obtained from the subject, wherein the first biomarker test measures a first expression level of a biomarker, the biomarker being free thyroxine (T4);

(b) administering a first dose of 2-(3,5-dichloro-4-((5-isopropyl-6-oxo-1,6-dihydropyridazin-3-yl)oxy)phenyl)-3,5-dioxo-2,3,4,5-tetrahydro-1,2,4-triazine-6-carbonitrile (“Compound A”) to the subject daily for a first period of time;

(c) performing a second biomarker test on a second biological sample obtained from the subject, wherein the second biomarker test measures a second expression level of free thyroxine (T4);

(d) determining a change or degree of change in the expression level of free thyroxine (T4) based on the results in steps (a) and (c), wherein the change or degree of change is indicative of the subject's sensitivity to Compound A; and

(e) administering a second dose of Compound A to the subject for a second period of time based on the sensitivity result from step (d).

19 . The method of claim 18 , wherein the second dose of Compound A is further determined based on at least one demographic feature of the subject, medication history of the subject, physical information of the subject, a genetic test or a pharmacokinetic test on a biological sample obtained from the subject, a physical examination on the subject, or a combination thereof.

20 . The method of claim 18 , wherein the biological sample is a blood or serum sample.

21 . The method of claim 18 , wherein the first dose is in the range of about 5 to 300 mg.

22 . The method of claim 18 , wherein the second dose is in the range of about 5 to 300 mg.

23 . The method of claim 18 , wherein Compound A is in a morphic form characterized by an X-ray powder diffraction pattern including peaks at about 10.5, 18.7, 22.9, 23.6, and 24.7 degrees 2θ.

24 . The method of claim 18 , wherein the first period of time is in the range of about 2-21 days.

25 . The method of claim 18 , wherein Compound A is administered orally.

26 . The method of claim 19 , wherein the pharmacokinetic test comprises measuring a level of a metabolite of Compound A in the biological sample at a predetermined time after the administration of the first dose.

27 . The method of claim 26 , wherein the metabolite of Compound A comprises M1 having the following structure:

28 . The method of claim 26 , wherein the predetermined time is at least 20 minutes.