Whether propafenone hydrochloride tablets can be taken for a long period of time is not specified and will need to be decided by your doctor after an assessment based on your medical condition and other factors. The instructions for Propafenone Hydrochloride Tablets do not specify the exact duration of the course of treatment for which this product is to be taken. Whether the drug can be taken for a long period of time should be decided by the doctor after a comprehensive assessment based on the efficacy of the drug, the individual’s tolerance level of the drug, and the condition of the patient, to decide whether to continue using the drug or to discontinue the drug. Propafenone hydrochloride tablets are used for supraventricular tachycardia, paroxysmal ventricular tachycardia. Adverse reactions to this product can be seen as dry mouth, numbness of the tongue and lips, headache, dizziness, nausea, vomiting, constipation, and symptoms of atrioventricular blockade. This product is contraindicated in sinus node dysfunction, double bundle branch conduction block, severe atrioventricular block, severe congestive heart failure, severe hypotension, cardiogenic shock, and hypersensitivity to the drug. Reasonable use of the drug should be in accordance with medical advice.