For the adverse effects of inotropic drugs, it is mainly the excitatory or inhibitory effect on peripheral nerves. Like myorelaxants themselves also have histamine releasing effects, which can lead to hemodynamic changes, causing arrhythmias, lower blood pressure, etc. There are also some non-depolarizing inotropic drugs such as succinylcholine, which may cause hyperkalemia at this time, and hyperkalemia is also a cause of cardiovascular reactions. Then there is the possibility of increased intragastric pressure, increased intraocular pressure, increased intracranial pressure, like inotropic drugs can block cholinergic receptors and produce vagal tissue effects, which may cause cardiac arrhythmias. There is also a part that may cause sympathetic ganglion inhibition, and there is also the possibility of phase II block when mixed, which can cause a long block.