Generic manufacturers in the U.S. and those overseas that produce medications used in the U.S. can be trusted to produce high quality generic substitutions due to regulatory oversight. In fact, it is the FDA inspections and regulatory action that halted the Ranbaxy overseas shipments of a popular cholesterol-lowering medication. Nonetheless, consumers should be diligent in assessing the validity of their medications.
Consumers can talk to their pharmacists to be sure the stocked generics are AB rated, meaning they meet FDA quality standards. If at any time you question the quality or validity of your medication, return it to your pharmacy and speak with the pharmacist.
Prescription medications can also be identified by using the Drugs.com Pill Identification Wizard at: https://www.drugs.com/pill_identification.html