HA-242, a benzodioxan derivative, is a muscle relaxant. It can be used for the treatment of central nervous muscular spasticity. Was marketed under the name Quiloflex. Quiloflex (HA-242) is a reflex inhibitor used in human medicine for the symptomatic treatment of spasticity due to pyramidal tract lesions. Quiloflex was also used for casting cattle and horses, and although well tolerated at a dosage of 1-8 mg/kg body wt. in cattle, it was unsuitable for use in this species as the onset of relaxation was slow and the sedation prolonged. A dosage of 6 mg/kg i/m in horses gave relaxation suitable for surgery in 30 min.