Effect of fazadinium (Fazadon) on muscle fasciculations induced by succinylcholine.

The effects on muscle fasciculations and ease of tracheal intubation of pretreatment with fazadinium before administration of succinylcholine were evaluated in 85 patients. Four dose levels of fazadinium evaluated were 0.05 mg . kg-1, 0.075 mg . kg-1, 0.10 mg . kg-1 and 0.15 mg . kg-1. The 0.05 mg . kg-1 dose did not always prevent succinylcholine-induced muscle fasciculations. The 0.15 mg . kg-1 dose gave poor conditions for tracheal intubation and was therefore discontinued. The 0.075 mg . kg-1 dose seemed optimal. Most patients felt transient pain at the site of the injection during administration of fazadinium, and many had a sensation of drowsiness.