A reversed-phase high-performance liquid chromatography method for the determination of cotrimoxazole (trimethoprim/ sulphamethoxazole) in children treated for malaria.

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 sample. 60 microL supernatant was added to 60 microL mobile phase, modified with 50microL 1 M sodium hydroxide/mL. The mobile phase consisted of 20% acetonitrile and 80% phosphate buffer adjusted to pH 6.15. Using 125 microL of the sample, limits of quantitation were 0.1 microg/mL for TMP, 1.0 microg/mL for SMX, and 1.0 microg/mL for AcSMX. The precision of the method was 2% to 11% over the range of concentrations tested, 0.5-30 microg/mL for TMP, 5-300 microg/mL for SMX, and 2.5-150 microg/mL for AcSMX, respectively. No interference with other commonly used drugs was observed. The method is rapid, simple, specific, and sensitive enough for pharmacokinetic studies. The small amount of blood required makes it suitable for pediatric patients. The method was used to analyze samples from Tanzanian children aged 6-59 months participating in a cotrimoxazole (TMP/SMX)/chloroquine randomized trial for the treatment of uncomplicated malaria. Venous blood samples from 68 children were collected 2 hours after the first dose of TMP/SMX (4 mg/kg TMP/20 mg/kg SMX at two divided doses for 5 days) and again at treatment day 4. Individual variations in plasma concentrations of TMP, SMX, and AcSMX were considerable. The mean and SEM plasma concentrations (g/mL) of TMP, SMX, and AcSMX 2 hours after the first treatment dose were 2.0 +/- 1.0 (range 0.5-6), 53 +/- 22 (range 24-146), and 13.5 +/- 12 (range 0-65), respectively. On the fourth day the attained plasma concentrations were not significantly different from samples collected after the first dose.

journal_name

Ther Drug Monit

authors

Rønn AM,Mutabingwa TK,Kreisby S,Angelo HR,Fuursted K,Bygbjerg IC

doi

10.1097/00007691-199912000-00005

subject

Has Abstract

pub_date

1999-12-01 00:00:00

pages

609-14

issue

6

eissn

0163-4356

issn

1536-3694

journal_volume

21

pub_type

临床试验,杂志文章,随机对照试验
  • Decreased hypoprothrombinemic effect of warfarin associated with furosemide.

    abstract::The authors describe a case of furosemide possibly inhibiting the hypoprothrombinemic effect of warfarin. The initiation of furosemide dosing in a patient receiving a stable dose of warfarin was associated with an 28% decrease in the international normalized ration (INR). Using normal volunteers, two previous controll...

    journal_title:Therapeutic drug monitoring

    pub_type: 杂志文章

    doi:10.1097/00007691-199706000-00019

    authors: Laizure SC,Madlock L,Cyr M,Self T

    更新日期:1997-06-01 00:00:00

  • Interference of digoxin-like immunoreactive substances with TDx digoxin II assay in different patients.

    abstract::The TDx digoxin II immunoassay was used in controls and in patients not taking digoxin or any other cardiac glycoside. We report the frequency of interference thought to be caused by digoxin-like factors (DLFs). We found a high incidence of false-positive results in 15 patients with severe hepatic disease (60% false-p...

    journal_title:Therapeutic drug monitoring

    pub_type: 杂志文章

    doi:10.1097/00007691-199111000-00010

    authors: Avendaño C,Alvarez JS,Sacristan JA,Adin J,Alsar MJ

    更新日期:1991-11-01 00:00:00

  • Impact of active metabolites on monitoring plasma concentrations of therapeutic drugs.

    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

    authors: Atkinson AJ Jr,Stec GP,Lertora JJ,Ruo TI,Thenot JP

    更新日期:1980-01-01 00:00:00

  • Small effects of valproic acid on the plasma concentrations of clozapine and its major metabolites in patients with schizophrenic or affective disorders.

    abstract::Two separate studies were carried out to assess the effect of valproic acid on the steady-state plasma concentrations of clozapine and its major metabolites norclozapine and clozapine N-oxide in psychotic patients. In the first study, concentrations of clozapine and metabolites were compared between patients treated w...

    journal_title:Therapeutic drug monitoring

    pub_type: 临床试验,杂志文章

    doi:10.1097/00007691-199906000-00017

    authors: Facciolà G,Avenoso A,Scordo MG,Madia AG,Ventimiglia A,Perucca E,Spina E

    更新日期:1999-06-01 00:00:00

  • Evaluation of the practicability of limited sampling strategies for the estimation of mycophenolic acid exposure in Chinese adult renal recipients.

    abstract::The immunosuppressive potential of mycophenolic acid (MPA) correlates well with MPA exposure [area under the concentration-time curve (AUC)]. Monitoring MPA AUC is important and helpful for maintaining the efficacy of mycophenolate mofetil while minimizing its side effects, but full MPA AUC monitoring is laborious, co...

    journal_title:Therapeutic drug monitoring

    pub_type: 杂志文章

    doi:10.1097/FTD.0b013e3181559f8a

    authors: Zicheng Y,Xianghui W,Peijun Z,Da X,Weixia Z,Hongzhuan C

    更新日期:2007-10-01 00:00:00

  • Evaluation of limited sampling strategies for estimation of 12-hour mycophenolic acid area under the plasma concentration-time curve in adult renal transplant patients.

    abstract::Mycophenolate mofetil, the oral prodrug of mycophenolic acid, is indicated as immunosuppressive therapy after renal transplantation. To aid in the investigation of pharmacokinetic-pharmacodynamic relationships of mycophenolic acid in the clinical setting, limited blood sampling strategies have been proposed, and model...

    journal_title:Therapeutic drug monitoring

    pub_type: 杂志文章

    doi:10.1097/00007691-200010000-00008

    authors: Willis C,Taylor PJ,Salm P,Tett SE,Pillans PI

    更新日期:2000-10-01 00:00:00

  • Determination of itraconazole and its active metabolite in plasma by column liquid chromatography.

    abstract::Itraconazole is a new triazole antifungal agent. Active orally, this drug is effective against a wide range of fungal pathogens that includes Aspergillus species, and its use in leukemic and AIDS patients is currently on the increase. Oral itraconazole absorption presents up to threefold interindividual variation in m...

    journal_title:Therapeutic drug monitoring

    pub_type: 杂志文章

    doi:10.1097/00007691-199412000-00011

    authors: Poirier JM,Lebot M,Descamps P,Levy M,Cheymol G

    更新日期:1994-12-01 00:00:00

  • The aminoglycoside panel: a new approach to monitoring aminoglycoside therapy.

    abstract::The aminoglycoside antibiotics gentamicin and tobramycin have been monitored traditionally by measuring peak and trough drug levels in serum. We found interpretation of these data to be hazardous, due to variations in the drug administration-specimen collection process and routine medical events and practices. We desc...

    journal_title:Therapeutic drug monitoring

    pub_type: 杂志文章

    doi:

    authors: Gorsky JE,Latts JR

    更新日期:1983-06-01 00:00:00

  • Therapeutic drug monitoring of infliximab in spondyloarthritis: an observational open-label study.

    abstract:BACKGROUND:Infliximab is a chimeric monoclonal antibody that binds to human tumor necrosis factor alpha and which is approved for refractory spondyloarthritis (SpA). Individual adjustment of infliximab dosage may help to improve the therapeutic response in SpA. We investigated whether a knowledge of infliximab serum co...

    journal_title:Therapeutic drug monitoring

    pub_type: 临床试验,杂志文章

    doi:10.1097/FTD.0b013e318224f83d

    authors: Méric JC,Mulleman D,Ducourau E,Lauféron F,Miow Lin DC,Watier H,Goupille P,Paintaud G

    更新日期:2011-08-01 00:00:00

  • Valproic acid-phenytoin interaction.

    abstract::The interaction between valproic acid (VPA) and phenytoin (DPH) was examined during therapeutic monitoring in an epileptic outpatient population. Gas-liquid chromatographic methods were used to measure DPH and VPA concentrations. (1) In 12 patients on stable DPH regimens, the mean DPH level declined from 19.7 to 15.3 ...

    journal_title:Therapeutic drug monitoring

    pub_type: 杂志文章

    doi:10.1097/00007691-197901020-00005

    authors: Friel PN,Leal KW,Wilensky AJ

    更新日期:1979-01-01 00:00:00

  • Indomethacin pharmacokinetics in neonates: the value of volume of distribution as a marker of permanent patent ductus arteriosus closure.

    abstract::Indomethacin (INDO) pharmacokinetics were examined in 18 neonates on 19 occasions, before and after patent ductus arteriosus (PDA) closure. Patients received INDO as an initial dose of 0.25 mg/kg intravenously, and INDO serum concentrations were measured 2 and 8 h after the dose. Subsequent doses were individualized b...

    journal_title:Therapeutic drug monitoring

    pub_type: 杂志文章

    doi:

    authors: Gal P,Ransom JL,Weaver RL,Schall S,Wyble LE,Carlos RQ,Brown Y

    更新日期:1991-01-01 00:00:00

  • Validation of an electrospray ionization LC-MS/MS method for quantitative analysis of raltegravir, etravirine, and 9 other antiretroviral agents in human plasma samples.

    abstract:BACKGROUND:Raltegravir is the first human immunodeficiency virus-1 (HIV-1) integrase inhibitor used in treatment-experienced patients who have evidence of viral replication and HIV-1 strains resistance to multiple antiretroviral regimens. Etravirine is a novel NNRTI, active against HIV-1 strains harboring multiple NNRT...

    journal_title:Therapeutic drug monitoring

    pub_type: 杂志文章

    doi:10.1097/FTD.0b013e3181c05adf

    authors: Quaranta S,Woloch C,Paccou A,Giocanti M,Solas C,Lacarelle B

    更新日期:2009-12-01 00:00:00

  • Doping-control analysis of the 5alpha-reductase inhibitor finasteride: determination of its influence on urinary steroid profiles and detection of its major urinary metabolite.

    abstract::5alpha-Reductase inhibitors such as finasteride are prohibited in sports according to the World Anti-Doping Agency. This class of drugs is used therapeutically to treat benign prostatic hyperplasia, as well as male baldness, by decreasing 5alpha-reductase activity. Accordingly, metabolic pathways of endogenous as well...

    journal_title:Therapeutic drug monitoring

    pub_type: 临床试验,杂志文章

    doi:10.1097/FTD.0b013e31803bb85d

    authors: Thevis M,Geyer H,Mareck U,Flenker U,Schänzer W

    更新日期:2007-04-01 00:00:00

  • Impact of POR and CYP3A5 Polymorphisms on Trough Concentration to Dose Ratio of Tacrolimus in the Early Post-operative Period Following Kidney Transplantation.

    abstract:BACKGROUND:Tacrolimus, a critical dose drug, is widely used in transplantation. Knowing the contribution of genetic factors, which significantly influence tacrolimus variability, is beneficial in the personalization of its starting dose. The significant impact of CYP3A5*3 polymorphisms on tacrolimus exposure has been r...

    journal_title:Therapeutic drug monitoring

    pub_type: 临床试验,杂志文章

    doi:10.1097/FTD.0000000000000542

    authors: Phupradit A,Vadcharavivad S,Ingsathit A,Kantachuvesiri S,Areepium N,Sra-Ium S,Auamnoy T,Sukasem C,Sumethkul V,Kitiyakara C

    更新日期:2018-10-01 00:00:00

  • Clinical correlates of methylphenidate blood levels.

    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

    authors: Gualtieri CT,Hicks RE,Patrick K,Schroeder SR,Breese GR

    更新日期:1984-01-01 00:00:00

  • Population pharmacokinetics of intravenous, intramuscular, and intranasal naloxone in human volunteers.

    abstract::To investigate the pharmacokinetics of naloxone in healthy volunteers, we undertook an open-label crossover study in which six male volunteers received naloxone on five occasions: intravenous (0.8 mg), intramuscular (0.8 mg), intranasal (0.8 mg), intravenous (2 mg), and intranasal (2 mg). Samples were collected for 4 ...

    journal_title:Therapeutic drug monitoring

    pub_type: 临床试验,杂志文章

    doi:10.1097/FTD.0b013e3181816214

    authors: Dowling J,Isbister GK,Kirkpatrick CM,Naidoo D,Graudins A

    更新日期:2008-08-01 00:00:00

  • Associations between ABCB1, CYP2A6, CYP2B6, CYP2D6, and CYP3A5 alleles in relation to efavirenz and nevirapine pharmacokinetics in HIV-infected individuals.

    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

    authors: Heil SG,van der Ende ME,Schenk PW,van der Heiden I,Lindemans J,Burger D,van Schaik RH

    更新日期:2012-04-01 00:00:00

  • Interaction of tricyclic antidepressants with cholestyramine in vitro.

    abstract::The adsorption of amitriptyline, desipramine, doxepin, imipramine, and nortriptyline onto cholestyramine was demonstrated in vitro with use of 1.2 mol/L HCl at 37 degrees C to simulate gastric fluid. Binding to cholestyramine was approximately 80% for each of the tricyclic antidepressants, and this was about the same ...

    journal_title:Therapeutic drug monitoring

    pub_type: 杂志文章

    doi:10.1097/00007691-199208000-00014

    authors: Bailey DN,Coffee JJ,Anderson B,Manoguerra AS

    更新日期:1992-08-01 00:00:00

  • A prospective evaluation of therapeutic drug monitoring.

    abstract::Since therapeutic drug monitoring is rapidly becoming a widely used tool in clinical medicine, we prospectively assessed 390 serum drug assays over a 4-week period to determine the appropriateness of serum sample collection. The results of appropriately collected samples were used to evaluate the ability of the physic...

    journal_title:Therapeutic drug monitoring

    pub_type: 杂志文章

    doi:10.1097/00007691-198309000-00002

    authors: Bussey HI,Hoffman EW

    更新日期:1983-01-01 00:00:00

  • Experience with cost-effective in-house reagents for the assay of carbamazepine in serum, using the Abbott TDx.

    abstract::The development of inexpensive in-house reagents for the assay of carbamazepine in serum, using a commercially available derivative and antiserum is described. They were adapted for use on the Abbott TDx as direct replacements for commercial reagents. Comparison with a high-performance liquid chromatography method is ...

    journal_title:Therapeutic drug monitoring

    pub_type: 杂志文章

    doi:10.1097/00007691-199306000-00006

    authors: Colbert DL,Turner GJ

    更新日期:1993-06-01 00:00:00

  • Cyclosporin A trough levels correlate with serum lipoproteins and apolipoproteins: implications for therapeutic drug monitoring of cyclosporin A.

    abstract::In a prospective study over 6 months, the relationship between serum lipid parameters and CsA whole blood trough concentrations was investigated in 39 renal transplant recipients receiving a triple immunosuppressive therapy with cyclosporin (CsA), azathioprine and prednisone. CsA trough concentrations were measured wi...

    journal_title:Therapeutic drug monitoring

    pub_type: 杂志文章

    doi:10.1097/00007691-199704000-00004

    authors: von Ahsen N,Helmhold M,Schütz E,Eisenhauer T,Armstrong VW,Oellerich M

    更新日期:1997-04-01 00:00:00

  • Determination of saliva trough levels for monitoring voriconazole therapy in immunocompromised children and adults.

    abstract::To evaluate the reliability and practical use of saliva for therapeutic drug monitoring of the antifungal agent voriconazole in immunocompromised patients, a paired-sample study was conducted. Plasma and saliva trough levels were measured in seven children and nine adults who required treatment for the prevention or t...

    journal_title:Therapeutic drug monitoring

    pub_type: 杂志文章,多中心研究

    doi:10.1097/FTD.0b013e3181cff20d

    authors: Michael C,Bierbach U,Frenzel K,Lange T,Basara N,Niederwieser D,Mauz-Körholz C,Preiss R

    更新日期:2010-04-01 00:00:00

  • Human scalp hair as evidence of individual dosage history of haloperidol: prospective study.

    abstract::The concentration of haloperidol in hair was measured by radioimmunoassay after hairs were dissolved in 2.5 N NaOH solution and the drug was extracted. In patients to whom haloperidol had been administered at fixed daily doses for more than 1 month, and in whom therapy had been just discontinued (group A, n = 5) or th...

    journal_title:Therapeutic drug monitoring

    pub_type: 杂志文章

    doi:10.1097/00007691-198911000-00013

    authors: Sato R,Uematsu T,Sato R,Yamaguchi S,Nakashima M

    更新日期:1989-11-01 00:00:00

  • Oral aripiprazole-induced severe hypoglycemia.

    abstract::This case report highlights a very rare adverse drug reaction caused by oral aripiprazole resulting in severe hypoglycemia. A 72-year-old-male patient suffering from Parkinson disease on prolonged carbidopa plus levodopa combination therapy (carbidopa 25 mg plus levodopa 100 mg, thrice daily) for 1.3 years was recentl...

    journal_title:Therapeutic drug monitoring

    pub_type: 杂志文章,评审

    doi:10.1097/FTD.0b013e3182557d10

    authors: Mondal S,Saha I,Das S,Ganguly A,Ghosh A,Kumar Das A

    更新日期:2012-06-01 00:00:00

  • Clinical relevance of therapeutic drug monitoring of digoxin and gentamicin in the saliva of children.

    abstract::Digoxin and gentamicin are widely used in pediatric medicine, and therapeutic monitoring is mandatory because of their narrow margin of safety and wide interpatient and intrapatient pharmacokinetic variabilities. Saliva sampling may be of potential interest, especially in children, in whom blood sampling is often diff...

    journal_title:Therapeutic drug monitoring

    pub_type: 杂志文章

    doi:10.1097/00007691-199806000-00003

    authors: Berkovitch M,Bistritzer T,Aladjem M,Burtin P,Dagan T,Chen-Levi Z,Freedom R,Koren G

    更新日期:1998-06-01 00:00:00

  • Preliminary buprenorphine sublingual tablet pharmacokinetic data in plasma, oral fluid, and sweat during treatment of opioid-dependent pregnant women.

    abstract:BACKGROUND:Buprenorphine is currently under investigation as a pharmacotherapy to treat pregnant women for opioid dependence. This research evaluates buprenorphine (BUP), norbuprenophine (NBUP), buprenorphine-glucuronide (BUP-Gluc), and norbuprenorphine-glucuronide (NBUP-Gluc) pharmacokinetics after high-dose (14-20 mg...

    journal_title:Therapeutic drug monitoring

    pub_type: 杂志文章,随机对照试验

    doi:10.1097/FTD.0b013e318228bb2a

    authors: Concheiro M,Jones HE,Johnson RE,Choo R,Huestis MA

    更新日期:2011-10-01 00:00:00

  • A Novel Quantitative Method for Analyzing Desmopressin in Human Plasma Using Liquid Chromatography-Tandem Mass Spectrometry.

    abstract:BACKGROUND:Desmopressin (D-amino D-arginine vasopressin: dDAVP) is used for the treatment of patients with hemophilia A and Von Willebrand disease. Studies on the rationale of dosing are scarce and mainly focus on the underlying causes of the vast differences in desmopressin response among individuals. The aim of this ...

    journal_title:Therapeutic drug monitoring

    pub_type: 杂志文章

    doi:10.1097/FTD.0000000000000791

    authors: de Jager NCB,Heijdra JM,Pistorius M,Kruip MJHA,Leebeek FWG,Cnossen MH,Mathôt RAA

    更新日期:2020-12-01 00:00:00

  • Quantification of Delta9-tetrahydrocannabinol and its major metabolites in meconium by gas chromatographic-mass spectrometric assay: assay validation and preliminary results of the "meconium project".

    abstract::A rapid and simple procedure based on gas chromatography-mass spectrometry (GC-MS) is described for determination of Delta-tetrahydrocannabinol (THC), 11-hydroxy-Delta-tetrahydrocannabinol (THC-OH) and 11-nor-Delta-tetrahydrocannabinol-9-carboxylic acid (THC-COOH) in meconium using Delta-tetrahydrocannabinol (Delta-TH...

    journal_title:Therapeutic drug monitoring

    pub_type: 杂志文章

    doi:10.1097/01.ftd.0000245380.95186.13

    authors: Marchei E,Pellegrini M,Pacifici R,Palmi I,Lozano J,García-Algar O,Pichini S

    更新日期:2006-10-01 00:00:00

  • Dosage adjustment of high-dose methotrexate using Bayesian estimation: a comparative study of two different concentrations at the end of 8-h infusions.

    abstract::Bayesian estimation (BE) of pharmacokinetic parameters enables the clinician to adjust the dosage of high-dose methotrexate (HDMTX) to correct the inter- and intraindividual variation of concentrations that are responsible for severe toxicity. In this study of 672 HDMTX infusions, we validated an approach that consist...

    journal_title:Therapeutic drug monitoring

    pub_type: 杂志文章

    doi:10.1097/00007691-199510000-00007

    authors: Pignon T,Lacarelle B,Duffaud F,Guillet P,Catalin J,Durand A,Favre R

    更新日期:1995-10-01 00:00:00

  • Evaluation of cross-reactivity of urinary digoxin-like substance in different radioimmunoassays.

    abstract::For the accuracy of routine monitoring of digoxin and digitoxin it seems important to get information on the cross-reactivity of endogenous digitalis-like substances (EDLS). To obtain EDLS, urine was passed on Sep-Pak columns and eluted in fractions by increasing concentrations of acetonitrile. Dilution series of two ...

    journal_title:Therapeutic drug monitoring

    pub_type: 杂志文章

    doi:

    authors: Vinge E,Ekman R

    更新日期:1988-01-01 00:00:00