The solution is to have three classes of quality for every drug: lower class, middle class, and upper class.

The lower class drugs must have pills with Chinese characters on them, and packaging with Chinese writing, and an English insert. They get minimal testing.

The upper class pills have American flags impressed on them, cost a metric tonne more, but are tested rigorously by private agencies (that are paid from the extra cost).

The aim here is propoganda: have people associate poor quality with Chinese goods and good quality with American goods.

(There is no middle class of drugs: if you are a middle earner you either decide to be either cheap, or to keep up appearances).