A Clinical Trial To Evaluate Efficacy And Safety Of Levophencynonate Hydrochloride In Patient With Vertigo

This study will conduct in 15 sites to enrolled 120 patients with vertigo under 7 days treatment and 7 days follow-up. The study includes three arms: high dose, low dose and placebo control.To observe the efficacy by change of vertigo severity and duration,and safety by vital sign,adverse event,etc.

Inclusion criteria

• At the age more than 18 years old male or female;
• Patients with vertigo caused by Posterior Circulation Infarction.
• Patients diagnosed Posterior Circulation Infarction based on the criteria of Posterior Circulation Ischemia of America;
• Meet the diagnose criteria of vertigo: Visual Motion (External Vertigo), or Rotation, Swing, Lift and Tilt Sensation (Internal Vertigo);
• Ability to sign the statements of informed consent;

Exclusion criteria

• Female patients having Pregnant, Lactating or Birth plan recently;
• Non-posterior circulation infarction patients;
• Vertigo caused by any other diseases;
• Long-term alcohol abuse, or drug abuse;
• Been in critical condition, difficult to make a precise evaluation of efficacy and safety of new drugs;
• History of allergies on Levophencynonate Hydrochloric or these compositions;
• Participation in another clinical trial in three months;
• Investigator thought that should be excluded due to other reason;