The influence of commonly used excipients, spray-dried lactose (SDL), microcrystalline cellulose (MCC), and partially pregelatinized maize starch (Starch 1500) on drug release from hydroxypropyl methylcellulose (HPMC, hypromellose) matrix system has been investigated. A model formulation contained 30%w/w drug, 20%w/w HPMC, 0.5%w/w fumed silica, 0.25%w/w magnesium stearate, and 49.25%w/w filler....

Background: Tolmetin (Tol) is a pyrrole acetic acid derivative that acts as a highly effective topical anti-inflammatory agent. Topical administration of Tol is effective for the management of ocular inflammations.The aim of this study was to formulate and improve a topical ophthalmic delivery system of Tol. Materials and methods: In the present study, ocular inserts of Tol were prepared using ...

Our purpose was to evaluate the efficacy of a new formulation of methylcellulose, preservative-free 0.5% hydroxypropyl methylcellulose (HPMC), for the treatment of dry eye. In the clinical part of our study, two groups of dry-eye patients, those with Sjögren's syndrome (SS) and those without (non-SS), were treated topically with 0.5% HPMC and evaluated for symptoms, ocular surface vital stainin...

A new tablet system was examined for an intestinal delivery using hydroxypropyl methylcellulose (HPMC) and shellac. HPMC incorporated into the inside of tablet, shellac coated on surface, which evaluated its controlled-release property through several dissolution tests, firstly in vitro then via two kinds clinical studies with healthy volunteers. The were originally designed by employing X-ray ...

Propranolol hidroklorida merupakan penghambat reseptor beta-1 yang digunakan untukterapi angina, aritmia jantung, dan hipertensi. Penggunaannya secara oral memiliki beberapamasalah seperti mengalami first pass effect, indeks terapi sempit, rasa pahit.Kekurangan tersebut bisa diatasi dengan memformulasikannya sebagai sediaan transdermalberupa patch. Komponen dalam patch transdermal adalah kombin...

The generation of tribo-electric charge during pharmaceutical powder processing can cause a range of complications, including segregation of components leading to content uniformity and particle surface adhesion. This phenomenon becomes problematical when excipients are introduced to a powder mixture alongside the highly charging active pharmaceutical ingredient(s) (APIs). The aim of this study...

BACKGROUND Derivatized celluloses, such as methylcellulose (MC) and hydroxypropyl methylcellulose (HPMC), are of pharmaceutical importance and extensively employed in tablet matrices. Each batch of derivatized cellulose is thoroughly characterized before utilized in tablet formulations as batch-to-batch differences can affect drug release. The substitution pattern of the derivatized cellulose p...