Final answer:
Depolarizing neuromuscular blocking drugs (NMBDs) like succinylcholine can cause various cardiac arrhythmias and side effects, including tachycardia, hypertension, ventricular fibrillation, and cardiac arrest.
Step-by-step explanation:
Depolarizing neuromuscular blocking drugs (NMBDs) like succinylcholine can cause various cardiac arrhythmias and side effects. These can include tachycardia and hypertension due to the activation of certain receptors, as well as ventricular fibrillation and cardiac arrest in rare cases. It is important to carefully monitor patients receiving succinylcholine and be prepared to manage these potential complications.