On day 1922 (dose: 900 mg/day), the patient expressed concern regarding hair loss. On day 1938 (dose: 900 mg/day), thinning of the hair was noticed on the parietal region of his head, indicating hair loss (the estimated plasma concentration of valproate was approximately 100 μg/ml). On day 1957, the dose of VPA-Na was increased to 1200 mg/day, although the progression of hair loss caused us to lower the dose to 600 mg/day on day 2003; his alopecia subsequently improved. The dose of VPA-Na was adjusted because of psychiatric symptoms. The patient's plasma concentrations of valproate were 62 μg/ml on day 2012 (dose: 600 mg/day), 37 μg/ml on day 2201 (dose: 300 mg/day), and 34 μg/ml on day 2306 (dose: 300 mg/day).
On day 1922 (dose: 900 mg/day), the patient expressed concern regarding hair loss. On day 1938 (dose: 900 mg/day), thinning of the hair was noticed on the parietal region of his head, indicating hair loss (the estimated plasma concentration of valproate was approximately 100 μg/ml). On day 1957, the dose of VPA-Na was increased to 1200 mg/day, although the progression of hair loss caused us to lower the dose to 600 mg/day on day 2003; his alopecia subsequently improved. The dose of VPA-Na was adjusted because of psychiatric symptoms. The patient's plasma concentrations of valproate were 62 μg/ml on day 2012 (dose: 600 mg/day), 37 μg/ml on day 2201 (dose: 300 mg/day), and 34 μg/ml on day 2306 (dose: 300 mg/day).