Propranolol, the main medication for idiopathic tremor, is a non-selective adrenergic beta receptor blocker, which works by blocking peripheral muscle beta receptors, blocking or slowing nerve conduction to achieve relief of tremor. Idiopathic tremor is a disorder with an incompletely defined pathogenesis associated with abnormal signaling in specific areas of the brain. Propranolol can block peripheral muscle beta receptors, slow down the conduction speed of the conduction system, so that the tremor is weakened or temporarily stopped, can effectively reduce the amplitude of limb tremor by 50%, belongs to the first-line recommended drugs for idiopathic tremor. It should be noted that the use of propranolol is prohibited if you suffer from bronchial asthma, cardiogenic shock, heart conduction block, severe or acute heart failure. Propranolol is not suitable for use in patients with axial tremor. Some patients may experience adverse reactions such as dizziness, confusion, depression, dyspnea, rash, etc. It is recommended to consult a doctor and use Propranolol strictly according to medical advice.