Betahistine Mesylate Tablets and Betahistine Hydrochloride belong to the same kind of drugs, clinically more than a single drug, is not recommended to take at the same time, the specific use of medical advice. Both betahistine mesylate tablets and betahistine hydrochloride are vasodilators, and their principles of action and indications are basically the same, so it is generally recommended to use a single drug in clinical treatment to avoid repeated use. In addition, it should be noted that betahistine mesylate tablets are prohibited for those who are allergic to it, and nausea, vomiting, skin rash and other adverse reactions may occur during the process of using the drug. The contraindications of Betahistine Hydrochloride are not clear, and adverse reactions include dry mouth, stomach upset, palpitations, etc. Therefore, those who have the need to use the above two drugs must be under the guidance of a doctor, do not blindly take the drug or increase or decrease the dosage on their own, so as not to cause adverse consequences.