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https://www.readbyqxmd.com/read/28339737/a-novel-chronic-opioid-monitoring-tool-to-assess-prescription-drug-steady-state-levels-in-oral-fluid
#1
Naum Shaparin, Neel Mehta, Frank Kunkel, Richard Stripp, Damon Borg, Elizabeth Kolb
Objective. : Interpretation limitations of urine drug testing and the invasiveness of blood toxicology have motivated the desire for the development of simpler methods to assess biologically active drug levels on an individualized patient basis. Oral fluid is a matrix well-suited for the challenge because collections are based on simple noninvasive procedures and drug concentrations better correlate to blood drug levels as oral fluid is a filtrate of the blood. Well-established pharmacokinetic models were utilized to generate oral fluid steady state concentration ranges to assess the interpretive value of the alternative matrix to monitor steady state plasma oxycodone levels...
February 23, 2017: Pain Medicine: the Official Journal of the American Academy of Pain Medicine
https://www.readbyqxmd.com/read/28334841/oral-fluid-testing-for-cocaine-analytical-evaluation-of-two-point-of-collection-drug-screening-devices
#2
Juliana Nichterwitz Scherer, Taís Regina Fiorentin, Tanara Rosangela Vieira Sousa, Renata Pereira Limberger, Flavio Pechansky
The use of point-of-collection testing (POCT) devices for drugs of abuse in oral fluid (OF) is an advantageous tool that has been used for different purposes-particularly traffic enforcement. However, even with the widespread report of cocaine consumption, the reliability of POCT devices has been reported in different magnitudes. This study evaluated the reliability of two POCT devices for the detection of cocaine in OF samples of 110 cocaine users: (i) the DDS2™ (cutoff = 30 ng/mL) and (ii) the Multi-Drugs Multi-Line-Twist Screen Test Device™ (MDML) (cutoff = 20 ng/mL)...
February 27, 2017: Journal of Analytical Toxicology
https://www.readbyqxmd.com/read/28333681/long-term-stability-of-vancomycin-hydrochloride-in-oral-solution-the-brand-name-versus-a-generic-product
#3
Sophie Huvelle, Marie Godet, Jean-Daniel Hecq, Patricia Gillet, Jacques Jamart, Laurence M Galanti
Vancomycin hydrochloride is often used for antibiotherapy in oral solution for hospitalized patients. Preparation of this solution in advance could improve time management or cost savings of drug delivery. Brand and generic products of vancomycin hydrochloride are now commercially available. The aim of this study was to investigate the long-term stability of the vancomycin hydrochloride brand name Vancocin versus the generic Vancomycine at 5°C ± 3°C. Five vials of each oral solution of 1.25 g/100 mL Vancocin and Vancomycine were stored up to 57 days at 5°C ± 3°C...
July 2016: International Journal of Pharmaceutical Compounding
https://www.readbyqxmd.com/read/28331292/an-open-label-two-period-comparative-study-on-pharmacokinetics-and-safety-of-a-combined-ethinylestradiol-gestodene-transdermal-contraceptive-patch
#4
Chao Zhang, Haiyan Li, Xin Xiong, Suodi Zhai, Yudong Wei, Shuang Zhang, Yuanyuan Zhang, Lin Xu, Li Liu
We investigated the pharmacokinetics and safety profiles of a newly developed combined ethinylestradiol (EE)/gestodene (GSD) transdermal contraceptive patch after a single-dose administration and compared with the market available tablet formulation in healthy adult subjects. An open-label, two-period comparative study was conducted in 12 healthy women volunteers. A single dose of the study combined EE/GE transdermal contraceptive patch and oral tablet (Milunet(®)) were administered. Blood samples at different time points after dose were collected, and concentrations were analyzed...
2017: Drug Design, Development and Therapy
https://www.readbyqxmd.com/read/28328524/paramagnetic-micro-particles-as-a-tool-for-rapid-quantification-of-apixaban-dabigatran-edoxaban-and-rivaroxaban-in-human-plasma-by-uhplc-ms-ms
#5
Martin H J Wiesen, Cornelia Blaich, Thomas Streichert, Guido Michels, Carsten Müller
BACKGROUND: Assessment of the anticoagulant activity of direct oral anticoagulants (DOACs) is justified in special clinical situations. Here, we evaluated two independent extraction methods and developed a multi-analyte ultra-high performance liquid chromatography tandem mass (UHPLC-MS/MS) method for the quantification of apixaban, dabigatran, edoxaban and rivaroxaban in human plasma. METHODS: Routine extraction based on protein precipitation with acetonitrile and subsequent centrifugation was compared to sample clean-up using commercial paramagnetic micro-particles and subsequent magnetic depletion...
March 22, 2017: Clinical Chemistry and Laboratory Medicine: CCLM
https://www.readbyqxmd.com/read/28328020/detection-of-glutathione-conjugates-of-amiodarone-and-its-reactive-diquinone-metabolites-in-rat-bile-using-mass-spectrometry-tools
#6
Keyur R Parmar, Shalu Jhajra, Saranjit Singh
RATIONALE: Amiodarone is reported to cause hepato and pulmonary toxicity in humans, which has been envisaged to be due to formation of its reactive metabolites, essentially based on its structural similarity to benzbromarone, a drug withdrawn from the market due to reasons of similar hepatotoxicity. Therefore, the purpose of this study was to detect glutathione conjugates of amiodarone and its reactive diquinone metabolites in rat bile using mass spectrometry tools. METHODS: Wistar rats were dosed orally with an amiodarone suspension and bile was collected via bile duct cannulation followed by solid-phase extraction, protein precipitation and centrifugation...
May 30, 2016: Rapid Communications in Mass Spectrometry: RCM
https://www.readbyqxmd.com/read/28323100/reflectometric-monitoring-of-the-dissolution-process-of-thin-polymeric-films
#7
Riikka Laitinen, Jukka Räty, Kristiina Korhonen, Jarkko Ketolainen, Kai-Erik Peiponen
Pharmaceutical thin films are versatile drug-delivery platforms i.e. allowing transdermal, oral, sublingual and buccal administration. However, dissolution testing of thin films is challenging since the commonly used dissolution tests for conventional dosage forms correspond rather poorly to the physiological conditions at the site of administration. Here we introduce a traditional optical reflection method for monitoring the dissolution behavior of thin polymeric films. The substances, e.g. drug molecules, released from the film generate an increase in the refractive index in the liquid medium which can be detected by reflectance monitoring...
March 17, 2017: International Journal of Pharmaceutics
https://www.readbyqxmd.com/read/28319002/hba1c-in-relation-to-incident-diabetes-and-diabetes-related-complications-in-non-diabetic-adults-at-baseline
#8
Patricia Anne Metcalf, Cam Kyle, Tim Kenealy, Rod T Jackson
AIMS: We compared the utility of glycated hemoglobin (HbA1c) and oral glucose tolerance (oGTT) in non-diabetic patients for identifying incident diabetes; all-cause mortality; cardiovascular disease (CVD) mortality; CVD, coronary heart disease (CHD), and ischemic stroke events; and diabetes microvascular complications. METHODS: Data from a New Zealand community setting were prospectively linked to hospitalization, mortality, pharmaceutical and laboratory test results data...
February 21, 2017: Journal of Diabetes and its Complications
https://www.readbyqxmd.com/read/28301092/pharmacokinetics-and-safety-of-dw1029m-a-botanical-drug-for-the-treatment-of-diabetic-nephropathy-following-single-doses-in-healthy-subjects
#9
Yunjeong Kim, Ji-Young Jeon, Eun-Young Kim, Cheol-Hee Lim, Hwan Bong Jang, Min-Gul Kim
DW1029M is a botanical extract of Morus albalinne root bark and Puerariae radix that is used for the treatment of diabetic nephropathy. This study evaluated the safety and pharmacokinetics of DW1029M following its administration in healthy Korean subjects. We conducted a randomized, open-label, single-dose, crossover phase 1 clinical study. During each period, subjects received 300, 600, or 1200 mg oral doses of DW1029M. Plasma concentrations of puerarin, daidzin, and daidzein were analyzed using a liquid chromatography-tandem mass spectrometry...
March 16, 2017: Clinical Pharmacology in Drug Development
https://www.readbyqxmd.com/read/28299804/simultaneous-determination-of-piperaquine-and-its-n-oxidated-metabolite-in-rat-plasma-using-lc-ms-ms
#10
Huixiang Liu, Meitong Zang, Aijuan Yang, Jianbo Ji, Jie Xing
A sensitive and efficient liquid chromatography tandem mass spectrometry method was firstly developed and validated for the simultaneous determination of piperaquine (PQ) and its N-oxidated metabolite (PQ-M) in plasma. A simple protein precipitation procedure was used for sample preparation. Adequate chromatographic retention was achieved on a C18 column under gradient elution with acetonitrile and 2 mM aqueous ammonium acetate containing 0.15% formic acid and 0.05% trifluoroacetic acid. A triple-quadrupole mass spectrometer equipped with an electrospray source was set up in the positive ion mode and multiple reaction monitoring mode...
March 16, 2017: Biomedical Chromatography: BMC
https://www.readbyqxmd.com/read/28291385/determination-of-oxytetracycline-and-4-epi-oxytetracycline-residues-in-feathers-and-edible-tissues-of-broiler-chickens-using-liquid-chromatography-coupled-with-tandem-mass-spectrometry
#11
Javiera Cornejo, Ekaterina Pokrant, Magdalena Krogh, Cristóbal Briceño, Héctor Hidalgo, Aldo Maddaleno, Carolina Araya-Jordán, Betty San Martín
Antibiotics have been widely used in poultry production for the treatment of bacterial diseases. However, drug residues can remain in products derived from animals after the cessation of the drug therapies. Feathers, in particular, have shown an affinity for antibiotics such as tetracycline, suggesting the persistence of these drugs in nonedible tissue. After the birds are slaughtered, feathers are ground into feather meals, which are used as organic fertilizer or an ingredient in animal diets, thereby entering into the food chain and becoming a potential risk for public health...
March 14, 2017: Journal of Food Protection
https://www.readbyqxmd.com/read/28290713/the-influence-of-growth-and-e-coli-endotoxaemia-on-amoxicillin-pharmacokinetics-in-turkeys
#12
B Poźniak, U Pasławska, K Motykiewicz-Pers, M Świtała
1. This experiment was designed to determine if the pharmacokinetics of amoxicillin (AMO) was affected by rapid growth or the acute phase reaction induced by intravenous (i.v.) injection of E. coli lipopolysaccharide (LPS). 2. Turkeys of 2.0, 5.5 and 12.0 kg were administered i.v. or orally with AMO sodium at the dose of 15 mg/kg. One group of turkeys (5.7 kg) was treated with LPS 1 h prior to i.v. AMO administration. Plasma drug concentrations were determined using high-performance liquid chromatography and pharmacokinetic parameters were calculated using a non-compartmental model...
March 14, 2017: British Poultry Science
https://www.readbyqxmd.com/read/28288290/effect-of-commonly-prescribed-liquid-medications-on-streptococcus-mutans-biofilm-an-in-vitro-study
#13
Samantha A Clark, LaQuia A Vinson, George Eckert, Richard L Gregory
OBJECTIVE: This study addressed the effect of pediatric liquid antibiotic medications on Streptococcus mutans UA159. These suspensions commonly contain sugars such as sucrose to make them more palatable for children. The study was designed to evaluate the effects of oral liquid antibiotics on Streptococcus mutans growth and biofilm formation. STUDY DESIGN: A 24 hour culture of S. mutans was treated with various concentrations of liquid medications commonly prescribed to children for odontogenic or fungal infections- amoxicillin, penicillin VK, clindamycin, and nystatin...
2017: Journal of Clinical Pediatric Dentistry
https://www.readbyqxmd.com/read/28287743/a-systematic-study-of-molecular-interactions-of-anionic-drugs-with-a-dimethylaminoethyl-methacrylate-copolymer-regarding-solubility-enhancement
#14
Wiebke Saal, Alfred Ross, Nicole Wyttenbach, Jochem Alsenz, Martin Kuentz
The methacrylate-copolymer Eudragit EPO (EPO) has raised interest in solubility enhancement of anionic drugs. Effects on aqueous drug solubility at rather low polymer concentrations are barely known despite their importance upon dissolution and dilution of oral dosage forms. We provide evidence for substantial enhancement (factor 4-230) of aqueous solubility of poorly water-soluble anionic drugs induced by low (0.1-5% (w/w)) concentration of EPO for a panel of seven acidic crystalline drugs. Diffusion data (determined by (1)H nuclear magnetic resonance spectroscopy) indicate that the solubility increasing effect monitored by quantitative ultraperformance liquid chromatography was caused primarily by molecular API polymer interactions in the bulk liquid phase...
March 21, 2017: Molecular Pharmaceutics
https://www.readbyqxmd.com/read/28286575/chiral-determination-of-3-4-methylenedioxypyrovalerone-enantiomers-in-rat-serum
#15
Michael D Hambuchen, Howard P Hendrickson, S Michael Owens
The emerging stimulant drug of abuse (3,4)-methylenedioxypyrovalerone [(R,S)-MDPV] is self-administered as a racemic mixture by intranasal, iv, oral, and smoking routes. The individual enantiomers are known to have widely different pharmacological effects, with (S)-MDPV showing much greater potency than (R)-MDPV in pharmacological testing. The goal of these studies was to develop and validate an analytical method for quantitation of (R)-MDPV, (S)-MDPV and (R,S)-MDPV in small volumes of rat serum using a chiral separation column and liquid chromatography-mass spectrometry...
January 28, 2017: Analytical Methods: Advancing Methods and Applications
https://www.readbyqxmd.com/read/28285620/evidence-against-the-participation-of-a-pharmacokinetic-interaction-in-the-protective-effect-of-single-dose-curcumin-against-gastrointestinal-damage-induced-by-indomethacin-in-rats
#16
Liliana Zazueta-Beltrán, Lorena Medina-Aymerich, Nadia Estela Díaz-Triste, Aracely Evangelina Chávez-Piña, Gilberto Castañeda-Hernández, Leticia Cruz-Antonio
OBJECTIVE: To determine the role of a pharmacokinetic interaction in the protective effect of curcumin against the gastric damage induced by indomethacin administration as such or as its prodrug acemetacin. METHODS: Wistar rats orally received single dose of indomethacin (30 mg/kg) with and without curcumin (30 mg/kg); gastric injury was evaluated by determining the total damaged area. Additional groups of rats received an oral single dose of indomethacin (30 mg/kg) or its prodrug acemetacin (34...
March 2017: Journal of Integrative Medicine
https://www.readbyqxmd.com/read/28284083/plasma-pharmacokinetics-and-bioavailability-of-verticillin-a-following-different-routes-of-administration-in-mice-using-liquid-chromatography-tandem-mass-spectrometry
#17
Jiang Wang, Xiaohua Zhu, Shamala Kolli, Hongyan Wang, Cedric J Pearce, Nicholas H Oberlies, Mitch A Phelps
Verticillin A is a natural product isolated from fungal cultures and has displayed potent antibiotic, antiviral, nematocidal, and anticancer properties in vitro. While in vivo studies have been limited due to sparse supply, the in vivo efficacy data that does exist demonstrates potent anti-tumor activity in murine cancer models. The current study aims to investigate the pharmacokinetics and bioavailability of verticillin A in mice to provide guidance for further efficacy assessment in mouse models. A sensitive and specific liquid chromatography-tandem mass spectrometry method was developed and validated for the quantification of verticillin A in mouse plasma...
March 1, 2017: Journal of Pharmaceutical and Biomedical Analysis
https://www.readbyqxmd.com/read/28284054/nanostructured-lipid-carriers-of-olmesartan-medoxomil-with-enhanced-oral-bioavailability
#18
Vikram Kaithwas, Chander Parkash Dora, Varun Kushwah, Sanyog Jain
The current study explores the potential of nanostructured lipid carriers (NLCs) for oral bioavailability enhancement of olmesartan medoxomil (OLM) by systemic design approach. OLM-NLC was successfully prepared with optimized process parameters (i.e. amount of liquid lipid, total amount of lipid, drug content and surfactant concentration) using the Box-Behnken design of experiments for different response parameters (i.e. particle size, Polydispersity index and entrapment efficiency). Further, optimized formulation was validated which depicted nano size, homogenous distribution with optimum entrapment efficiency...
March 6, 2017: Colloids and Surfaces. B, Biointerfaces
https://www.readbyqxmd.com/read/28279930/metabolites-identification-of-berberine-in-rats-using-ultra-high-performance-liquid-chromatography-quadrupole-time-of-flight-mass-spectrometry
#19
Kun Wang, Liwei Chai, Xinchi Feng, Zhongbo Liu, Hongxia Liu, Liqin Ding, Feng Qiu
Berberine (BBR), the principle component for many medicinal plants such as Coptis chinensis Franch., Phellodendron chinense Schneid., and Mahonia bealei (Fort.) Carr., possesses diverse pharmacological activities, including anti-bacterial, anti-inflammatory, antitumor, hypolipidemic and antidiabetic activities. In this study, a rapid and reliable method using a five-step strategy based on the ultra-performance liquid chromatography coupled with quadrupole time-of-flight mass spectrometry (UPLC/Q-TOF-MS), and metabolynx™ software with mass defect filter (MDF) technique was developed to investigate the metabolism of BBR...
February 27, 2017: Journal of Pharmaceutical and Biomedical Analysis
https://www.readbyqxmd.com/read/28276787/granulated-colloidal-silicon-dioxide-based-self-microemulsifying-tablets-as-a-versatile-approach-in-enhancement-of-solubility-and-therapeutic-potential-of-anti-diabetic-agent-formulation-design-and-in-vitro-in-vivo-evaluation
#20
Vikas Pandey, Ritu M Gilhotra, Seema Kohli
The current research work was executed with an aim to explore and promote the potential of self-microemusifying drug delivery systems (SMEDDS) in the form of tablets, in order to enhance solubility and oral bioavailability of poorly aqueous soluble drug Repaglinide (RPG). RPG-loaded liquid SMEDDS were developed consisting Labrafil M 1944CS, Kolliphor EL and Propylene glycol, which were then characterized on various parameters. After characterization and optimization, liquid SMEDDS were converted into solid form by adsorbing on Aeroperl® 300 pharma and polyplasdone(TM) XL...
February 23, 2017: Drug Development and Industrial Pharmacy
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