[Broken_Hippo]

Honestly: I don't know enough about drug production to say. That said:

I can see how one generic would be vastly more to produce than another. For example: Prozac's generic is widely taken, as are generic antibiotics and antihistamines. These probably don't require a special batch of pills and can pretty well have dedicated machinery that gets used fully.

In contrast: One Multiple Sclerosis drug, a pill, recently became generic. MS isn't exactly as widespread as allergies, depression, or bacterial infections and not everyone on MS takes this drug. It is cheaper than the name brand - which can easily cost $5k per month - but even as a generic, it is a specialty medicine. I'm not convinced the price is fair in this case, but I am guessing that the manufacturing is quite a bit more expensive due to things like cleaning the old drug out before batching this one and working in smaller batches.

I also sometimes have questions about the difficulty in producing different chemicals: I'm sure some drugs take more power and more steps than others.

Unfortunately, though, there is little to no transparency in drug prices and they don't have to justify their prices to insurances - though, IIRC, some nations do require some types of justification (must work better than the lower-priced alternative already on the market, for example).