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The brand product and the authorized generic (same as brand) are manufactured by Janssen. There may be other names in addition to Janssen, such as Janssen-Cilag and Alza. The authorized generic may say distributed by Watson and/or Actavis. (The brands that are NOT bioequivalent to Concerta are Mallinckrodt and Kudco.)
Look at the bottle for the name of the manufacturer. If the pharmacy used their own bottle, the manufacturer’s name will be on the label. If you got the original bottle, the original label is under the pharmacy label.
Ask your pharmacist what you have, and get the package insert that comes with the prescription. This is discarded by most pharmacies.
Look at the tablets. The brand and authorized generic are the same: Methylphenidate HCl Extended-Release Tablets are available in 18 mg, 27 mg, 36 mg, and 54 mg dosage strengths. The 18 mg tablets are yellow and imprinted with “alza 18”. The 27 mg tablets are gray and imprinted with “alza 27”. The 36 mg tablets are white and imprinted with “alza 36”. The 54 mg tablets are brownish-red and imprinted with “alza 54”. All four dosage strengths are supplied in bottles containing 30 or 100 tablets.
Look at photos of the brand tablets on the internet. OROS is the type of delivery system. Wikipedia has a good photo of the 54 mg tablet: https://en.wikipedia.org/wiki/Osmotic_controlled-release_oral_delivery_system
Google whatever letters and numbers are on your tablets or capsules. Even better, put in the information at https://www.drugs.com/imprints.php This will identify your product and its manufacturer.