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SuspendedNCT03192566Updated Aug 22, 2024

Acetaminophen Dosing in Obese Adolescents

A Phase 3 interventional study of Tylenol in Obesity, Childhood, sponsored by Children's National Research Institute. Suspended at 1 site in United States. Open to participants aged 10 Years to 18 Years, including healthy volunteers. Per ClinicalTrials.gov, last updated 2024-08-22.

Sponsored by Children's National Research Institute · Phase 3, Interventional, and Treatment

Why this study was suspended
financial

From the registry’s dates

  • Registered 9 months after the study started (first participant enrolled Aug 2016, registered May 2017).
Phase
Phase 3
Study type
Interventional
Enrollment
6
Allocation
Not applicable
Ages
10 Years to 18 Years
Sex
All
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Study summary

Although there are numerous studies investigating the pharmacokinetic properties of intravenous acetaminophen in infants and children with normal weight, there are none in the obese pediatric patient . This study will investigate the pharmacokinetics and pharmacodynamics of acetaminophen (total Cl and Vd) in obese children and adolescents

Read the detailed description

Obesity represents one of the most important public health issues according to the World Health Organization. It has reached epidemic proportions globally, with approximately 1.5 billion overweight adults aged 20 years and older and at least 600 million of them clinically obese .Childhood obesity is particularly problematic, because the co morbid disease states which accompany early obesity may require frequent pharmacotherapy and/or surgical intervention. Many of the metabolic and cardiovascular complications of obesity may also be present during childhood. Despite increased pharmacotherapy among obese patients, there is a paucity of dosing guidelines for this population. Optimal drug dosing in obese pediatric patients has not been explored as the present data available is specific for obese adults. Acetaminophen is one of the most commonly used medications in pediatric patients.

Although there are numerous studies investigating the pharmacokinetic properties of intravenous acetaminophen in infants and children with normal weight there are none in the obese pediatric patient . This study will investigate the pharmacokinetics and pharmacodynamics of acetaminophen (total clearance and volume of distribution in obese children and adolescents

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Conditions studied

  • Obesity, Childhood

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Keywords

  • Acetaminophen
  • Anesthesia
  • Adolescent
  • Obesity
03

In context

Pediatric Obesity

1,117 studies on the registry are indexed under Pediatric Obesity; 189 are open to participants now.

This study's planned enrollment of 6 is below the median of 103 across 862 interventional studies indexed under Pediatric Obesity.

Browse Pediatric Obesity studies →

Lead sponsor

Children's National Research Institute is the lead sponsor of 124 studies on the registry; 45 are open to participants now.

Counted across the registry records on this site, refreshed daily.

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Who can participate

Ages eligible
10 Years to 18 Years
Sexes eligible
All
Accepts healthy volunteers
Yes

Inclusion criteria

  • Participant will be a Children's National Health System (CNHS) inpatient or outpatient admitted for at least 24 hours observation as part of the surgical plan of care.
  • Age range will be between 10 and 18.
  • BMI% will be calculated using height and weight and will include the 5th-85th% (normal weight) and greater than or equal to 95th %.( obese weight)
  • ASA physical classification of I, II or III.
  • All racial and ethnic groups will be included

Exclusion criteria

Exclusion Criteria:

  • Any patient that is pregnant or lactating.
  • Renal insufficiency identified by GFR \<60 ml/min/1.73m2 and/or creatinine > 3 times upper limit of normal values
  • Liver disease identified by : AST, ALT, γ-GT, bilirubin, albumin and AlkP and PT > 3 times upper limit of normal values
  • Patients with Gilbert-Meulengracht Syndrome
  • Chronic alcohol intake or use of alcohol within last 72 hours
  • Patients who are treated with drugs know to effect CYP2E1(inhibition: dithiocarb and disulfiram. Induction: isoniazid) and UGT (UDP-glucuronyltransferases) (induction: estradiol-containing contraceptives, carbamazepine, phenobarbital, phenytoin, mesuximide, oxcarbazepine, rifampicin, primidone, atazanavir / ritonavir, lopinavir / ritonavir, olanzapine, retigabine , nevaripine, efavirenz, saquinavir, nelfinavir, lamotrigine, felbamate, zonisamide, bupropion. Inhibition: valproic acid)
  • Diabetes mellitus type II patients
  • Smoking
  • Acetaminophen intake up to 24 hours before enrollment.
  • Acetaminophen allergy
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Study design

Phase
Phase 3
Primary purpose
Treatment
Allocation
Not applicable
Intervention model
Single group
Masking
None (open label)
Enrollment
6 participants (estimated)

Study arms

  • Experimental
    Tylenol Dosing

    Dosing of Tylenol for postoperative pain relief will include: children \< 16 years; 650 mg every 6 hours, max 2.6 gram per 24 hours and children \> or equal to 16 years every 6 hours 1 g of acetaminophen, max 4 gram per 24 hours).

    Drug: Tylenol

Interventions

  • DrugTylenol

    Dosing of Tylenol for post operative pain control

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What researchers measure

Primary outcomes

  1. Systemic clearance of acetaminophen and its metabolites (glucuronide, sulphate, cystein and mercapturic acid) in adolescent surgical patients

    Time frame: up to 3 years

Secondary outcomes

  1. Evaluate postoperative pain management using the numerical rating scale system.

    Time frame: up to 3 years

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Study locations

1 site
  • Childrens National Health System
    Washington, District of Columbia 20010, United States
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References and documents

Publications

  • Flegal KM, Carroll MD, Kit BK, Ogden CL. Prevalence of obesity and trends in the distribution of body mass index among US adults, 1999-2010. JAMA. 2012 Feb 1;307(5):491-7. doi: 10.1001/jama.2012.39. Epub 2012 Jan 17. PubMed 22253363 ↗
  • Ogden CL, Carroll MD, Kit BK, Flegal KM. Prevalence of obesity and trends in body mass index among US children and adolescents, 1999-2010. JAMA. 2012 Feb 1;307(5):483-90. doi: 10.1001/jama.2012.40. Epub 2012 Jan 17. PubMed 22253364 ↗
  • Cali AM, Caprio S. Obesity in children and adolescents. J Clin Endocrinol Metab. 2008 Nov;93(11 Suppl 1):S31-6. doi: 10.1210/jc.2008-1363. PubMed 18987268 ↗
  • Erstad BL. Which weight for weight-based dosage regimens in obese patients? Am J Health Syst Pharm. 2002 Nov 1;59(21):2105-10. doi: 10.1093/ajhp/59.21.2105. No abstract available. PubMed 12434728 ↗
  • Blouin RA, Warren GW. Pharmacokinetic considerations in obesity. J Pharm Sci. 1999 Jan;88(1):1-7. doi: 10.1021/js980173a. No abstract available. PubMed 9874695 ↗
  • Cheymol G. Clinical pharmacokinetics of drugs in obesity. An update. Clin Pharmacokinet. 1993 Aug;25(2):103-14. doi: 10.2165/00003088-199325020-00003. PubMed 8403734 ↗
  • Mohammed BS, Engelhardt T, Cameron GA, Cameron L, Hawksworth GM, Hawwa AF, McElnay J, Helms PJ, McLay JS. Population pharmacokinetics of single-dose intravenous paracetamol in children. Br J Anaesth. 2012 May;108(5):823-9. doi: 10.1093/bja/aes025. Epub 2012 Mar 1. PubMed 22389380 ↗
  • Zuppa AF, Hammer GB, Barrett JS, Kenney BF, Kassir N, Mouksassi S, Royal MA. Safety and population pharmacokinetic analysis of intravenous acetaminophen in neonates, infants, children, and adolescents with pain or Fever. J Pediatr Pharmacol Ther. 2011 Oct;16(4):246-61. doi: 10.5863/1551-6776-16.4.246. PubMed 22768009 ↗

Individual participant data

Plan to share: No

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Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Aug 22, 2024, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
10

Registry details

Key details

Study ID
NCT03192566
Lead sponsor
Children's National Research Institute
Responsible party
Janelle Vaughns (Principal Investigator, Children's National Research Institute) — Principal investigator
First posted
Jun 20, 2017
Start date
Aug 2016
Primary completion
Aug 2024 (estimated)
Completion
Sep 2025 (estimated)
Last update
Aug 22, 2024

Oversight

Data monitoring committee
No
FDA-regulated drug
Yes
FDA-regulated device
No
View the source record on ClinicalTrials.gov ↗

Not currently enrolling

This study is suspended, as verified in Aug 2024. You cannot join it, but the record below documents what was studied.

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