the same logic applies in pharmaceutical glass items such as vials that are intended to hold medicinal products. while many of these items are composed of more durable borosilicate glass, they are also at times dealkalized in order to minimize the possibility of alkali leaching from the glass into the product. this action helps to avoid undesired changes in ph or ionic strength of the solution, which not only inhibits eventual attack of the glass as previously described, but can also be important in maintaining the efficacy or stability of sensitive product formulations.