Previously, foil pouches were used for packaging medicines. This was because people were not aware of the importance of packaging. They did not realize that different packaging was needed for different products. But with the advancement of technology, new methods are being discovered for pill packaging.
Just like vitamin packaging, special material is required for packaging each medicine. The material must not react with the medicine it holds. More importantly, it should be made hygienically. Another important factor is related to the cost of packaging. There is no point of using a process that costs more than the product that it is going to store.
There are also some medicines that react with light and lose their properties. Such medicines can be enclosed in black or dark packages. However, some medicines require light for storage. They can be enclosed in clear packages.
Undoubtedly, pill packaging requires some knowledge of the medicine. So make sure you explain the medicine details to the pouch manufacturer.