Are there good quality counterfeit medicines?

No. There are no good quality counterfeit medicines.

By definition counterfeit medicines are products whose true identity and or source are unknown or hidden. They are mislabelled with respect to identity and or source and are produced by criminals.

It is true that, sometimes, a counterfeit medicine may pass laboratory tests but this does not mean that it is a good quality medicine. GMP requires that the label on the container of a medicine should indicate, among others, the name of the active ingredient, the name of the manufacturer and the country of manufacture. If a manufacturer intentionally hides or gives wrong information regarding any of these the product becomes counterfeit. It is, therefore, unwise to assume that there are good quality counterfeit medicines. Counterfeiters should not be expected to produce good quality medicines since their motive is to make money unlawfully.