“…crosslinked poly(acrylic acid)) are well known for providing mucoadhesion. Similar to the previous studies, P407 or a combination of P407 and P188 78,79,84,85,[88][89][90][91] were mixed with poly(vinyl alcohol), 87 methylcellulose 80 and its derivatives, 75,[77][78][79]81,85,86,93,100,198 such as carboxymethylcellulose 79 and HPMC, 75,77,78,81,85,86,93,100,198 sodium alginate, 76,85 Carbopol®, 74,88,94,98 chitosan, 82,89,90,92,96,97,100,198 sodium poly(acrylate), 101 glycerin, 83 polycarbophil, 93,99 methoxy poly(ethylene glycol)-b-poly(D,L-lactic acid) (poly(MPEG-b-PDLLA)) …”