{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,16]],"date-time":"2026-10-16T22:40:43Z","timestamp":1792190443893,"version":"4.4.0"},"reference-count":59,"publisher":"MDPI AG","issue":"5","license":[{"start":{"date-parts":[[2023,5,16]],"date-time":"2023-05-16T00:00:00Z","timestamp":1684195200000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"Istanbul University Scientific Research Projects Unit","award":["29467"],"award-info":[{"award-number":["29467"]}]},{"name":"Istanbul University","award":["29467"],"award-info":[{"award-number":["29467"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Pharmaceutics"],"abstract":"<jats:p>Aprepitant is the first member of a relatively new antiemetic drug class called NK1 receptor antagonists. It is commonly prescribed to prevent chemotherapy-induced nausea and vomiting. Although it is included in many treatment guidelines, its poor solubility causes bioavailability issues. A particle size reduction technique was used in the commercial formulation to overcome low bioavailability. Production with this method consists of many successive steps that cause the cost of the drug to increase. This study aims to develop an alternative, cost-effective formulation to the existing nanocrystal form. We designed a self-emulsifying formulation that can be filled into capsules in a melted state and then solidified at room temperature. Solidification was achieved by using surfactants with a melting temperature above room temperature. Various polymers have also been tested to maintain the supersaturated state of the drug. The optimized formulation consists of CapryolTM 90, Kolliphor\u00ae CS20, Transcutol\u00ae P, and Soluplus\u00ae; it was characterized by DLS, FTIR, DSC, and XRPD techniques. A lipolysis test was conducted to predict the digestion performance of formulations in the gastrointestinal system. Dissolution studies showed an increased dissolution rate of the drug. Finally, the cytotoxicity of the formulation was tested in the Caco-2 cell line. According to the results, a formulation with improved solubility and low toxicity was obtained.<\/jats:p>","DOI":"10.3390\/pharmaceutics15051509","type":"journal-article","created":{"date-parts":[[2023,5,17]],"date-time":"2023-05-17T01:52:41Z","timestamp":1684288361000},"page":"1509","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":11,"title":["A Novel Semi-Solid Self-Emulsifying Formulation of Aprepitant for Oral Delivery: An In Vitro Evaluation"],"prefix":"10.3390","volume":"15","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-5763-1450","authenticated-orcid":false,"given":"Hakan","family":"Nazl\u0131","sequence":"first","affiliation":[{"name":"Department of Pharmaceutical Technology, Trakya University, 22030 Edirne, Turkey"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-2838-1688","authenticated-orcid":false,"given":"Burcu","family":"Mesut","sequence":"additional","affiliation":[{"name":"Department of Pharmaceutical Technology, Istanbul University, 34116 Istanbul, Turkey"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-6524-3535","authenticated-orcid":false,"given":"\u00d6zlem","family":"Akbal-Da\u011f\u0131stan","sequence":"additional","affiliation":[{"name":"Department of Pharmaceutical Technology, Istanbul University, 34116 Istanbul, Turkey"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9110-3704","authenticated-orcid":false,"given":"Y\u0131ld\u0131z","family":"\u00d6zsoy","sequence":"additional","affiliation":[{"name":"Department of Pharmaceutical Technology, Istanbul University, 34116 Istanbul, Turkey"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2023,5,16]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"2316","DOI":"10.1093\/annonc\/mdq149","article-title":"Aprepitant: Drug-drug interactions in perspective","volume":"21","author":"Aapro","year":"2010","journal-title":"Ann. 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