Ipenoxazone is an effective and centrally acting muscle relaxant.

An intravenous injection of 2 mg/kg Ipenoxazone causes a reduction of electromyographic activity which reaches a maximum within 3 min after the injection. High doses (greater than 30 mg/kg i.p.) of Ipenoxazone produce transient and dose-dependent sedation in almost all mice about 5 min after its administration. After the injection of Ipenoxazone at a dose of 4 mg/kg within 1 min, the blood pressure changes from a control level of 138±9 mmHg to a minimum level of 98±9 mmHg (n=6) but it rapidly returns to the control level within 1 to 2 min, while the rigidity is still reduced significantly at that time [2].