They’re both metoprolol, but they contain different salt forms. The two brand-name forms of metoprolol (as well as the different generic forms) are different versions of the medication. In some cases, they may not be available in all strengths or forms as the brand-name drugs. Generic drugs usually cost less than the brand-name versions.
Metoprolol oral tablets are available as the brand-name drugs Lopressor and Toprol XL. It also comes in an injectable form that’s only given by a healthcare provider. It comes as immediate-release and extended-release oral tablets, and extended-release oral capsules.
