CDER SBIA Update: FDA concerns about therapeutic equivalence with two generic versions of Concerta tablets (methylphenidate hydrochloride extended-release)

FDA concerns about therapeutic equivalence with two generic versions of Concerta tablets (methylphenidate hydrochloride extended-release) 

Based on an analysis of data, FDA has concerns about whether or not two approved generic versions of Concerta tablets (methylphenidate hydrochloride extended-release tablets), used to treat attention-deficit hyperactivity disorder in adults and children, are therapeutically equivalent to the brand-name drug. The two approved generic versions of Concerta are manufactured by Mallinckrodt Pharmaceuticals and Kudco Ireland Ltd. 

As a result, the FDA has changed the therapeutic equivalence (TE) rating for the Mallinckrodt and Kudco products from AB to BX. This means the Mallinckrodt and Kudco products are still approved and can be prescribed, but are no longer recommended as automatically substitutable at the pharmacy (or by a pharmacist) for Concerta. 

Consequently, FDA has revised its draft guidance for industry for bioequivalence testing for methylphenidate hydrochloride extended-release tablets (Concerta). FDA has asked that within six months, Mallinckrodt and Kudco confirm the bioequivalence of their products using the revised bioequivalence standards, or voluntarily withdraw their products from the market.

FDA will continue to evaluate its testing and approval standards and bioequivalence guidances for other generic methylphenidate hydrochloride extended-release products and revise as needed.

Please find additional information at: http://www.fda.gov/Drugs/DrugSafety/ucm422568.htm

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