“…Besides lidocaine, several other drugs such as ondansetron [8,9], magnesium sulfate [10], sodium bicarbonate [10,15], fentanyl [16,17], and remifentanil [18,19] are effective in reducing pain on rocuronium injection, but pretreatment of lidocaine or other drugs before rocuronium prolongs the time between anesthesia induction and neuromuscular block administration. In addition, most of these drugs can, even in rare cases, induce adverse effects such as allergic reaction, bradycardia, and hypotension.…”