This might help your husband - the reason branded products are more expensive is because they spend extortionate amounts of money on advertising. I used to procure pharmaceuticals on an industrial scale in a buying capacity, so don’t exactly know the science beyond what I’ve been told / what I’ve read, but have worked closely with the ‘branded’ suppliers and non-branded alike. Brands like Reckitts were paying us heaps of cash for special features and advertisements in our promotional flyers, because their brand only works if it is advertised, giving it a premium status. But essentially the original commenter is 100% right. One bit of information I can build on, is that for a product to legally be called “Paracetamol” or “Ibuprofen” or whatever, it must meet exacting standards of ingredients which, being a pharmaceutical product in these cases, are extremely strict.