Objective To observe the therapeutic effect of supplemented Golden Coffer Alisma Decoction on cervical vertigo with phlegm turbidity obstructing the center.Methods Totally 108cases of cervical vertigo with phlegm turbidity obstructing the center were randomized into treatment group and control group

with 54in each.The treatment group was given oral granules of supplemented Alisma Decoction and the control group was given Mesylate Betahistine Tablets.The treatment lasted for 4weeks.The relief of main symptoms

the change of transcranial Doppler（TCD）and side effect was observed and compared in both groups before and after treatment.Results The total effective rate of the treatment group and the control group was 85.18%and 66.67% respectively

with significant difference between groups（P<0.05）.After treatment

the integral differences of vertigo

headache

nausea and tinnitus were statistically significant（P<0.05）

especially in the treatment group（P< 0.05）.The cerebral hemodynamics indicators such as left vertebral artery（LVA）

right vertebral artery（RVA）and basilar artery（BA）were significantly improved in the treatment group（P<0.05）

and LVA were significantly improved in the control group（P<0.05）.Comparing with the control group

LVA and BA improved significantly in the treatment group（P< 0.05）.Conclusion The supplemented Alisma Decoction is effective and safe for cervical vertigo with phlegm turbidity obstructing the center.It could obviously relieve the symptoms and improve the cerebral hemodynamics indicators.