Background:

Ipenoxazone is a potent and centrally acting muscle relaxant.

Ipenoxazone is a potent and centrally acting muscle relaxant[1]. An intravenous injection of 2 mg/kg Ipenoxazone causes a reduction of electromyographic activity which reaches a maximum within 3 min after the injection. Within 1 min after the injection of Ipenoxazone at a dose of 4 mg/kg, 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. High doses (greater than 30 mg/kg i.p.) of Ipenoxazone produces a transient and dose-dependent sedation in almost all mice about 5 min after its administration[2].

[1]. Kimura A, et al. Inhibitory effects of a new, potent, centrally acting muscle relaxant, (4S,5R)-4-(2-methylpropyl)-3-[3-(perhydroazepin-1-yl)propyl]-5- phenyl-1,3-oxazolidin-2-one (NC-1200) on micturition contractions of the bladder in rats. Eur J Pharmacol. 1988 Jul 26;152(1-2):55-62. [2]. Masaki M, et al. A new class of potent centrally acting muscle relaxants: pharmacology of oxazolidinones in rat decerebrate rigidity. Br J Pharmacol. 1986 Sep;89(1):219-28.