He, Haibing Preparation of pH-dependent modified-release pellets of urapidil to improve its bioavailability. [electronic resource] - Pharmaceutical development and technology Jun 2011 - 212-8 p. digital Publication Type: Journal Article ISSN: 1097-9867 Standard No.: 10.3109/10837451003592191 doi Subjects--Topical Terms: Administration, OralBiological AvailabilityCross-Over StudiesExcipients--chemistryHumansHydrogen-Ion ConcentrationHypromellose DerivativesIntestinal Mucosa--metabolismMaleMethacrylates--chemistryMethylcellulose--analogs & derivativesPiperazines--administration & dosagePolyethylene Glycols--chemistryPolymers--chemistryRandomized Controlled Trials as TopicSolubilityTablets, Enteric-Coated--chemistryTalc--chemistryYoung Adult