I'm not 100% sure what you're saying, but aspirin is probably the cheapest drug in the world. Nobody is making huge profits from aspirin.

Source?

It's one of the most common medications. At scale I imagine even small margins create profit.

Generic Equate brand Asprin is $3.64 for a 500 count bottle at Walmart. 3/4 of a penny per Asprin. Nobody is printing consequential profit on that.

And that's the cost in what is by far the world's most expensive healthcare environment. The other comment is correct, the competitive market for generic Asprin generally makes it a very low profit product category. The only way to make a bit of money in Asprin, is eg what Bayer does, sell things like orange flavored chewables in their low-dose subset (which is then immediately undercut by generics anyway; Bayer's 300 count version is $10 at Walgreens, the generic version is $6; two to three pennies per).

I doubt it. It's a generic that anyone can manufacture and that invariably will squeeze profit margins to almost nothing. In the UK, many supermarkets sell their own brand aspirin and paracetamol for pennies, as loss leaders.

Surely the incentive of this supposedly big asprin industry would be to prove asprin is safe?

I assume the commenter was talking about other drug companies, e.g. those making drugs for heart disease.