Grave's disease is an autoimmune thyroid disease with several characteristic symptoms and signs. Grave's ophthalmopathy, an inflammatory disease in the orbital area, is the primary extrathyroid manifestation of Grave's disease. About 5% of Grave's ophthalmopathy patients have moderate to severe severity requiring high doses of systemic corticosteroid therapy. Grave's disease also has a few complications, one of which is thyrotoxic periodic paralysis characterized by hypokalemia and muscle

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... sis. Chronic hepatitis B virus infection has the potential to be co-incidence with other diseases (e.g., Grave's ophthalmopathy). The need for a high dose of corticosteroid therapy in treating Grave's ophthalmopathy is a risk of reactivation in hepatitis B-infected patients. This paper presented a Grave's disease patient complicated with Grave's ophthalmopathy who developed limb muscle weakness. The patient will receive high doses of corticosteroids and prophylactic lamivudine therapy to prevent hepatitis B virus reactivation.