The FDA is proposing to withdraw approval of two generic versions of Concerta (methylphenidate hydrochloride) extended-release (ER) capsules, used to treat attention-deficit hyperactivity. 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. 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 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. Concerta is a central nervous system stimulant prescription medicine. It affects chemicals in the brain and nerves that contribute to hyperactivity and impulse control. 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 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. The drug that contains only dextrorotatory methylphenidate is sometimes called d-TMP, although this name is only rarely used, and it is much more commonly referred to as dexmethylphenidate, d-MPH, or d-threo-methylphenidate. 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.