Methylphenidate belongs to a group of medicines called stimulants. It may work by increasing levels of natural brain chemicals, such as norepinephrine and dopamine. Wondering when a generic version of Concerta will be available? Get details on FDA approval status, generic manufacturers, and patent expirations. Generic Concerta is called methylphenidate extended-release (ER). There are several pharmaceutical companies that make generic versions of Concerta that are equivalent to the brand-name product. Methylphenidate hydrochloride extended-release (ER) is a drug approved by FDA to treat attention deficit-hyperactivity disorder (ADHD) in adults and children ages six and older. It belongs to a group of drugs called stimulants. Concerta is a brand-name medication that’s also available as the generic drug methylphenidate ER (extended release). Concerta has a boxed. A number of manufacturers make generic versions of Concerta, including some that are not guaranteed to have the same osmotic-controlled release oral delivery system (OROS) as the original Concerta. The only “authorized generic” is currently made by Patriot Pharmaceuticals, a wholly-owned subsidiary of Janssen. Methylphenidate ER (Concerta, Relexxii) is an expensive drug used to treat attention-deficit hyperactivity disorder (ADHD). It is also used to treat narcolepsy. This drug is slightly more popular than comparable drugs. It is available in brand and generic versions.