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Table 1 The demographic and clinical data and intravenous (IV) ketamine infusion rates at which 6 patients achieved a VAS pain score of 3 or less

From: Intravenous ketamine for subacute treatment of refractory chronic migraine: a case series

Patient Age/sex Age at migraine onset Duration of Illness Psychiatric and Pain Comorbidities Initial VAS IV Ketamine Rate VAS < 3 Time to maintain VAS of 3 or less for duration of 8 h
1 42/F 26 16 years Depression, Panic Attacks, Chronic Back Pain 10 0.42 mg/kg/hr 36 h
2 29/F 15 14 years Panic Attacks 10 0.38 mg/kg/hr 40 h
3 31/M 19 12 years Complex Regional Pain Syndrome 9 0.41 mg/kg/hr 20 h
4 54/F 8 46 years None 9 0.12 mg/kg/hr 12 h
5 30/F 10 20 years Depression, Borderline Personality Disorder, Chronic Neck Pain 9 0.35 mg/kg/hr 73 h
6 47/F 29 18 years Depression 9 0.34 mg/kg/hr 82 h