The low volumes of products being sold are a consequence of the market becoming supplied with generic products as a result of both the manufacturer's policy of voluntary licensing agreements and expiry of patents.
Müüdud toodete väikesed kogused on tingitud turule jõudnud geneerilistest ravimitest, see on nii tootjate järgitava vabatahtlike litsentsilepingute põhimõtte kui ka patentide aegumise tagajärg.