Look at what Pfizer claims they found in counterfeit Viagra:
Blue printer ink
Amphetamines, also known as “speed”
Metronidazole, a powerful antibiotic that could
cause an allergic reaction, diarrhea, or vomiting
Too much active ingredient (or not enough),
which may cause you harm
Binding agents, such as drywall, that prevent
the tablet from breaking down in your system
And look what Pfizer claims they found in other counterfeit medications:
Toxic ingredients, such as boric acid, floor wax,
brick dust, rat poison, and road paint
Ingredients that can have dangerous interactions
with other medications you may be taking
A completely different medication with
potentially harmful side effects
Yes I know that Pfizer is hardly a disinterested party. But I still get the impression that there's a lot of defective product out there.
Not just counterfeit, but indisputably defective!