Mu mankhwala, Hydroxypropyl Methylcellulose (HPMC) imapezeka ngati chinthu chofunikira komanso chogwiritsidwa ntchito m'njira zosiyanasiyana, makamaka ikagwiritsidwa ntchito popanga mapiritsi. Nkhaniyi ikupereka kufufuza kwakuya momwe HPMC imagwirira ntchito yofunika kwambiri popanga mapiritsi, zomwe zimakhudza momwe amagwirira ntchito komanso momwe amagwirira ntchito.