The term "Tocainide S Isomer" refers to a specific chemical compound that belongs to the class of antiarrhythmic medications. However, when it comes to synonyms for this compound, there might not be any commonly used alternatives. Tocainide S Isomer is a distinctive name that denotes the specific isomeric form of tocainide. Isomers are compounds with the same molecular formula but different arrangements of atoms. Hence, it is crucial to use the correct name to avoid any confusion or misunderstandings. Thus, it is recommended to stick to the accurate term "Tocainide S Isomer" when referring to this specific compound.