The correct name for Mesylate Tablets is Mesylate Hydrochloride Tablets. The first dose is 200-300 mg, followed by another 100-200 mg every 2 hours if necessary, and usually about 400-800 mg is taken by mouth in 2-3 divided doses daily. Mesylate hydrochloride tablets are mainly used to treat chronic ventricular arrhythmias such as ventricular premature exposures and ventricular tachycardia. Adverse reactions after taking the drug include: nausea and vomiting, liver function abnormalities, dizziness, tremor, ataxia, somnolence, coma, convulsions, blurred vision, psychosis, insomnia, sinus bradycardia, chest pain, ventricular tachycardia, and skin rash. It is contraindicated in patients with cardiogenic shock, in those with II or III degree AV block or sick sinus syndrome, and in lactating women. Use with caution in patients with hypotension, severe congestive heart failure, abnormal hepatic function, intraventricular conduction block, and severe sinus bradycardia. If you need to use Mesylate Hydrochloride Tablets, please consult a professional doctor, follow the doctor’s instructions, reasonable use of medication.