Stability studies are done to establish the shelflife of drugs,commonly accelerated stability studies are done so that the changes after longer storage are known.Hptlc of the drug during different stages of storage is done to determine the changes occurring due to storage. It would have been great if the exact nature of the drug would be known that you are interested in.
packaging under dry & other standard condition may boost the shelf life of any drug product. Tetra packing may more benefited to preserve the qualitative potency of a drug.