Abstract:
:A sensitive and specific direct-injection high-performance liquid chromatography-atmospheric pressure chemical ionization tandem mass-spectrometry (HPLC-APCI-MS-MS) method has been developed for the rapid identification and quantitation of seven tricyclic antidepressants-amitriptyline, nortriptyline, doxepin, dosulepin, dibenzepin, opipramol, and melitracen-in human plasma. After the addition of the internal standard lofepramine and dilution with 0.1% formic acid, plasma samples were injected into the LC-MS-MS system. Proteins and other large biomolecules were removed during an on-line sample cleanup using an Oasis extraction column (1 x 50 mm, ID, 30 microm) with a 100% aqueous mobile phase at a flow rate of 4 mL/min. The extraction column was subsequently brought in-line with the analytical column by automatic valve switching. Analytes were separated on a 5-microm Symmetry C18 (Waters) analytical column (3.0 x 150 mm, ID) using a step gradient of acetonitrile-0.1% formic acid at a flow rate of 0.6 mL/min. The total analysis time was only 12 minutes per sample. The interday and intraday coefficients of variation for all compounds were =11%. The assay was sufficiently sensitive to monitor all seven compounds within their therapeutic ranges. The proposed method has been in routine use for more than 1 year and permits direct analysis of plasma samples without time-consuming sample preparation, which may be especially advantageous for clinical laboratories.
journal_name
Ther Drug Monitjournal_title
Therapeutic drug monitoringauthors
Kollroser M,Schober Cdoi
10.1097/00007691-200208000-00013subject
Has Abstractpub_date
2002-08-01 00:00:00pages
537-44issue
4eissn
0163-4356issn
1536-3694journal_volume
24pub_type
杂志文章abstract::Caffeine is a potentially useful alternative to theophylline for the treatment and prevention of apnea of prematurity because of its lower toxicity and longer terminal half-life. Monitoring of salivary caffeine concentrations is less invasive than blood sampling, especially in very sick premature neonates. Caffeine ci...
journal_title:Therapeutic drug monitoring
pub_type: 临床试验,杂志文章,随机对照试验
doi:10.1097/00007691-199606000-00012
更新日期:1996-06-01 00:00:00
abstract::The DuPont theophylline assay reagent kit, a particle-enhanced turbidimetric inhibition immunoassay (PETINIA) method adapted for use on a centrifugal fast analyzer, was evaluated. It was compared with fluorescence polarization immunoassay (FPIA). Day-to-day precision was 4.7% at 6.8 micrograms/ml, and 3.3% at 26.6 mic...
journal_title:Therapeutic drug monitoring
pub_type: 杂志文章
doi:10.1097/00007691-198606000-00019
更新日期:1986-01-01 00:00:00
abstract::Major advances in immunosuppression and reductions in the rates of acute rejection have led to increasing graft and patient survival rates during the past two decades. Chronic dysfunction of the renal allograft, however, remains a major clinical problem and probably represents the end result of the complex interplay b...
journal_title:Therapeutic drug monitoring
pub_type: 杂志文章,评审
doi:10.1097/00007691-200202000-00007
更新日期:2002-02-01 00:00:00
abstract::The clinical correlates of methylphenidate blood levels in hyper-active children and normal adults were examined in five studies. Although occasional correlations between blood levels and neuroendocrine response were noted within subjects along the pharmacokinetic time profile of the drug, no significant associations ...
journal_title:Therapeutic drug monitoring
pub_type: 杂志文章
doi:10.1097/00007691-198412000-00001
更新日期:1984-01-01 00:00:00
abstract:BACKGROUND:Ribavirin exposure after the first dose (D0AUC0-4h) >1755 mcg·h·L is predictive of sustained virological response (SVR) in patients with hepatitis C treated with peginterferon and ribavirin. The aim of this study was to test the benefit of ribavirin early dose adjustment based on this target in naïve patient...
journal_title:Therapeutic drug monitoring
pub_type: 杂志文章,多中心研究,随机对照试验
doi:10.1097/FTD.0000000000000332
更新日期:2016-12-01 00:00:00
abstract::Steady state serum concentrations of risperidone and 9-hydroxyrisperidone (9-OH-risperidone), the active moiety, were measured in 42 patients. The concentration-to-dose ratios (C/D) varied by a factor of 20, from 1.8 to 36.8 (nmol/l)/(mg/24 hours), and 90% of the active moiety was constituted of 9-OH-risperidone. No c...
journal_title:Therapeutic drug monitoring
pub_type: 临床试验,杂志文章
doi:10.1097/00007691-199808000-00004
更新日期:1998-08-01 00:00:00
abstract::Monitoring plasma concentrations of therapeutic drugs presents special problems when these drugs are metabolized to compounds that have pharmacologic activity. This presentation reviews several methods for evaluating the pharmacologic activity of drug metabolites and describes the impact of active drug metabolites on ...
journal_title:Therapeutic drug monitoring
pub_type: 杂志文章,评审
doi:10.1097/00007691-198001000-00004
更新日期:1980-01-01 00:00:00
abstract:OBJECTIVES:The objective of the present study was to perform an external evaluation of published linezolid population pharmacokinetic and pharmacodynamic models, in order to evaluate the predictive performance using an independent dataset. Another aim was to offer an elegant environment for display and simulation of bo...
journal_title:Therapeutic drug monitoring
pub_type: 杂志文章
doi:10.1097/FTD.0000000000000816
更新日期:2020-09-28 00:00:00
abstract::Pharmacokinetics of intravenous and oral pulsed high-dose dexamethasone were studied in four patients with pemphigus vulgaris. Doses for dexamethasone were varied from 100 to 300 mg. Serum concentrations were measured by high-performance liquid chromatographic procedure with diode assay detection. Bioavailability was ...
journal_title:Therapeutic drug monitoring
pub_type: 杂志文章
doi:10.1097/00007691-199910000-00007
更新日期:1999-10-01 00:00:00
abstract:BACKGROUND:Δ9-tetrahydrocannabinol (THC) and cannabidiol (CBD) time courses in serum and physiological and behavioral effects associated with smoking 1 or 4 "light cannabis" cigarettes were studied. Biomarkers to differentiate light cannabis versus illegal and medical cannabis use were also investigated. METHODS:Sera ...
journal_title:Therapeutic drug monitoring
pub_type: 杂志文章
doi:10.1097/FTD.0000000000000683
更新日期:2020-02-01 00:00:00
abstract::A simple and rapid liquid chromatography tandem mass spectrometry (HPLC-MS/MS) method for the analysis of voriconazole has been developed. For comparison, serum voriconazole was measured using HPLC and bioassay. For the HPLC-MS/MS assay, samples were prepared in a deep-well block by adding 10 microL of serum to 40 mic...
journal_title:Therapeutic drug monitoring
pub_type: 杂志文章
doi:10.1097/00007691-200412000-00011
更新日期:2004-12-01 00:00:00
abstract::Ergotamine has been used for therapeutic purposes since the 1950s, usually to treat vascular headache. It is highly toxic and in large, repeated doses can produce all the symptoms of ergot poisoning. A selective and sensitive method, based on liquid chromatography-tandem mass spectrometry (LC-MS2), has been developed ...
journal_title:Therapeutic drug monitoring
pub_type: 临床试验,杂志文章
doi:10.1097/FTD.0b013e318067dfe7
更新日期:2007-06-01 00:00:00
abstract::Plasma levels of 6-mercaptopurine were determined in 22 consecutive children with acute lymphoblastic leukemia on oral remission maintenance therapy during the time period of August 1984 to January 1988. Each child received the drug once daily for up to 3 years and was studied repeatedly (1-12 times). An HPLC method w...
journal_title:Therapeutic drug monitoring
pub_type: 杂志文章
doi:10.1097/00007691-198911000-00001
更新日期:1989-11-01 00:00:00
abstract::There are data suggesting an association between mycophenolic acid (MPA) levels and acute rejection and toxicity in renal transplant recipients treated with mycophenolate mofetil (MMF), and therefore, knowledge of factors determining MPA levels may aid in accurate adjustment of MMF dosage. A total of 4970 samples take...
journal_title:Therapeutic drug monitoring
pub_type: 临床试验,杂志文章
doi:10.1097/01.ftd.0000167885.17280.6f
更新日期:2005-08-01 00:00:00
abstract::A 64-year-old man on chronic hemodialysis for end-stage renal disease developed peritoneal carcinomatosis, and palliative chemotherapy with fluorouracil was started. The drug was administered (325 mg/m as IV bolus, at 2 PM) on 2 separate occasions, ie, 1 hour after dialysis and 2 days later, 49 hours after dialysis. T...
journal_title:Therapeutic drug monitoring
pub_type: 杂志文章
doi:10.1097/01.ftd.0000183384.89275.f4
更新日期:2005-12-01 00:00:00
abstract:BACKGROUND:Antiepileptic drug therapeutic regimens often need to be adjusted individually on the basis of serum assays. We aimed to develop a quantitative, fast, and sensitive liquid chromatography-tandem mass spectrometry method to simultaneously analyze carbamazepine, oxcarbazepine, and the 10-11 epoxide carbamazepin...
journal_title:Therapeutic drug monitoring
pub_type: 杂志文章
doi:10.1097/FTD.0b013e3182425168
更新日期:2012-02-01 00:00:00
abstract::The major goal of immunosuppressive development is improved selectivity of the drug's inhibitory action against T and B cell-mediated as opposed to nonspecific granulocyte-, monocyte-, and macrophage-mediated resistance. This enterprise demands increased knowledge of alloantigen-induced stimulation, signal transductio...
journal_title:Therapeutic drug monitoring
pub_type: 历史文章,杂志文章
doi:10.1097/00007691-199512000-00002
更新日期:1995-12-01 00:00:00
abstract:BACKGROUND:Chronic opioid use and polypharmacy are commonly seen in chronic pain patients presenting for spine procedures. Substance abuse and misuse have also been reported in this patient population. Negative perioperative effects have been found in patients exposed to chronic opioid, alcohol, and recreational substa...
journal_title:Therapeutic drug monitoring
pub_type: 杂志文章
doi:10.1097/FTD.0000000000000837
更新日期:2021-02-01 00:00:00
abstract::Hyperlipidemia interferes with spectrophotometric assays of a number of analytes. No interference was found in the assay of gentamicin, phenytoin, or phenobarbital due to turbidity in levels of triglyceride less than or equal to 2,000 mg/dl with the Abbott TDx or Syva enzyme multiplied immunoassay (EMIT) methods. Ther...
journal_title:Therapeutic drug monitoring
pub_type: 杂志文章
doi:10.1097/00007691-198703000-00013
更新日期:1987-01-01 00:00:00
abstract:BACKGROUND:The association of CYP3A5, CYP3A4, and ABCB1 single nucleotide polymorphisms (SNPs) with cyclosporine (CsA) pharmacokinetics is controversial. The authors studied the influence of these SNPs on CsA pharmacokinetics as well as on the incidence of biopsy-proven acute rejection (BPAR) and renal function after k...
journal_title:Therapeutic drug monitoring
pub_type: 杂志文章,多中心研究,随机对照试验
doi:10.1097/FTD.0b013e31820feb8e
更新日期:2011-04-01 00:00:00
abstract:BACKGROUND:There is a high coincidence between obesity and psychiatric disorders including depression. Depressive disorders are commonly treated with antidepressants, including the selective serotonin reuptake inhibitor Lexapro (escitalopram). Although candidates for elective Roux-en-Y gastric bypass (RYGB) surgery may...
journal_title:Therapeutic drug monitoring
pub_type: 杂志文章
doi:10.1097/FTD.0000000000000146
更新日期:2015-06-01 00:00:00
abstract::A high-performance liquid chromatography (HPLC) method was developed for the simultaneous analysis of trimethoprim (TMP), sulphamethoxazole (SMX), and acetylsulphamethoxazole (AcSMX) in small amounts of blood. The method involved precipitation with 50 microL trichloracetic acid (1M) to 125 microL plasma or serum sampl...
journal_title:Therapeutic drug monitoring
pub_type: 临床试验,杂志文章,随机对照试验
doi:10.1097/00007691-199912000-00005
更新日期:1999-12-01 00:00:00
abstract:BACKGROUND:Lacosamide (LCM) is one of the newer antiepileptic drugs (AEDs) licensed as add-on treatment for partial epilepsy. Data on LCM pharmacokinetics and interactions are limited and partly contradictory. The purpose of this study was to assess the effect of concomitant AED therapy on steady state plasma concentra...
journal_title:Therapeutic drug monitoring
pub_type: 杂志文章,随机对照试验
doi:10.1097/FTD.0b013e318290eacc
更新日期:2013-12-01 00:00:00
abstract::Drug discovery programs are actively exploring for therapeutic agents targeting enzymes and receptors regulating sphingolipid metabolism and biologic functions. FTY720 is a close structural analogue of sphingosine with immunomodulatory properties. After oral administration, FTY720 is phosphorylated by sphingosine kina...
journal_title:Therapeutic drug monitoring
pub_type: 杂志文章,评审
doi:10.1097/00007691-200412000-00001
更新日期:2004-12-01 00:00:00
abstract::The analysis of pemoline (2-imino-5-phenyl-4-oxazolidine) by a rapid, sensitive, and specific high performance liquid chromatographic assay using ultraviolet detection is described. Only 100 microliters of plasma or serum is required. Analytical recoveries of 88% for pemoline and 93% for the internal standard (4-methy...
journal_title:Therapeutic drug monitoring
pub_type: 杂志文章
doi:10.1097/00007691-198007000-00009
更新日期:1980-01-01 00:00:00
abstract::Pharmacokinetic and pharmacodynamic interactions between the gastrokinetic drug cisapride and the antipsychotic drugs bromperidol and haloperidol were studied in 29 schizophrenic inpatients. Fourteen patients were taking bromperidol (12-24 mg/d), and 15 were taking haloperidol (12-36 mg/d). Cisapride 10 mg/d was coadm...
journal_title:Therapeutic drug monitoring
pub_type: 临床试验,杂志文章
doi:10.1097/00007691-199906000-00007
更新日期:1999-06-01 00:00:00
abstract::Whole blood steady-state trough concentrations of cyclosporine were measured by radioimmunoassay (RIA) and TDx assays employing monoclonal antibodies in 82 samples from 39 renal transplant patients. Intra- and interassay coefficients of variation for the new TDx technique averaged 3.2 and 5.4%, respectively. In the co...
journal_title:Therapeutic drug monitoring
pub_type: 杂志文章
doi:10.1097/00007691-199109000-00012
更新日期:1991-09-01 00:00:00
abstract:BACKGROUND:Human immunodeficiency virus (HIV)-infected individuals show large interindividual variation in response to antiretroviral therapy. Efavirenz (EFV) and nevirapine (NVP) are nonnucleoside reverse transcriptase inhibitors, which are prescribed in combination with other antiretroviral therapy in so-called highl...
journal_title:Therapeutic drug monitoring
pub_type: 杂志文章
doi:10.1097/FTD.0b013e31824868f3
更新日期:2012-04-01 00:00:00
abstract::The authors report the use of high-performance liquid chromatography-electrospray-tandem mass spectrometry (HPLC-ESI-MS/MS) for the quantification of indomethacin (IND) in plasma with microscale sample preparation. Plasma samples (100 microL) and mefanamic acid (internal standard [IS]), buffered to pH 3.5, were prepar...
journal_title:Therapeutic drug monitoring
pub_type: 杂志文章
doi:10.1097/00007691-199812000-00020
更新日期:1998-12-01 00:00:00
abstract::A method is described for the determination of vigabatrin in 50 microliters of plasma by isocratic high-performance liquid chromatography using fluorescence detection. The procedure involves protein precipitation with methanol followed by precolumn derivatisation with o-phthaldialdehyde reagent. Separation of the deri...
journal_title:Therapeutic drug monitoring
pub_type: 杂志文章
doi:10.1097/00007691-199105000-00011
更新日期:1991-05-01 00:00:00