Medical Information Only. Always consult your healthcare provider before enrolling in any clinical trial.
NCT04397445 · ClinicalTrials.gov registry record · Phase 1
Clinical Study to Investigate the Urinary Excretion of N-nitrosodimethylamine (NDMA) After Ranitidine Administration
A Phase 1 study of Pharmacokinetics and Food-drug Interaction, sponsored by Food and Drug Administration (FDA).
- Completed
- Registry status
- Phase 1
- Development phase
- 18
- Enrollment target
- 1
- Study location
NCT04397445: Completed Phase 1 study of Pharmacokinetics and Food-drug Interaction, sponsored by Food and Drug Administration (FDA).
NCT04397445 is a Phase 1 study of Pharmacokinetics and Food-drug Interaction that has completed, run by Food and Drug Administration (FDA). The registered enrollment target is 18 participants, below the 62-participant average among 37 other Pharmacokinetics trials with a reported enrollment target (71% lower). The trial reports 1 study location across 1 state. According to ClinicalTrials.gov, the official US trial registry.
The verdict
NCT04397445, a Phase 1 study of Pharmacokinetics and Food-drug Interaction, has completed, sponsored by Food and Drug Administration (FDA).
- COMPLETED
- Registry status
- Phase 1
- Development phase
- 18 participants
- Enrollment target
- 1
- Study location
Study Summary
Ranitidine is an over-the-counter and prescription drug, which decreases the amount of acid secreted by the stomach. Some ranitidine medicines contain an impurity called N-nitrosodimethylamine (NDMA) at low levels. NDMA is classified as a probable human carcinogen (a substance that could cause cancer) based on results from laboratory tests. NDMA is a known environmental contaminant and found in water and foods, including meats, dairy products, and vegetables. The US Food and Drug Administration (FDA) has found levels of NDMA in some ranitidine products similar to the levels you would expect to be exposed to if you ate common foods like grilled or smoked meats. The ranitidine that will be used in this study has been tested twice (months apart) and shown to have stable NDMA levels well below the acceptable daily limit. Of note, the risk of NDMA with ranitidine is only relevant with prolonged chronic administration as at the acceptable limit, there is approximately a 1 in 100,000 chance of cancer after 70 years of exposure to that level. FDA has also conducted tests that simulate the potential formation of NDMA from ranitidine after it has been exposed to acid in the stomach with a normal diet. Results of these tests indicate that NDMA is not formed in typical stomach conditions. Similarly, if ranitidine is exposed to a simulated small intestinal fluid, NDMA is not formed. Other laboratory experiments suggest a combination of nitrites, such as found in processed meats, and an acidic environment may increase NDMA formation, however the levels of nitrites tested were very high. Separately, a previous study in 10 healthy volunteers showed that volunteers who received ranitidine had an increase in urinary NDMA excreted over 24 h. The level of increase was greater than would be expected from laboratory testing. This clinical study is being performed to determine if and how much NDMA is produced from ranitidine in the human body and whether nitrite-containing foods may in
Primary Outcome
The cumulative amount of NDMA excreted over 24 hours is determined by calculating the amount excreted during specified intervals (includes all planned collections and unscheduled voids) and summarizing totals over a 24-h period.
Conditions Studied
Interventions
- DRUG Placebo
- DRUG Ranitidine
- OTHER Low nitrite/NDMA meals
- OTHER High nitrite/NDMA meals
Study Locations (1)
Wisconsin
- Spaulding Clinical Research - West Bend
Trial Details
| Field | Value |
|---|---|
| Enrollment Target | 18 participants |
| Start Date | 2020-06-08 |
| Est. Completion | 2020-07-01 |
| Phase | Phase 1 |
What the finished NCT04397445 record still lists
NCT04397445 is an interventional study that assigns participants to a tested intervention. The registry caps enrollment at 18 participants, a relatively small participant target, below the 62-participant average among 37 other Pharmacokinetics trials with a reported enrollment target (71% lower).
The record links to 3 conditions, with Pharmacokinetics appearing as the primary indexed condition, and to 4 interventions - of which Placebo is the first listed.
NCT04397445 reports a single indexed study location in Wisconsin.
Frequently Asked Questions
What is clinical trial NCT04397445 about?
NCT04397445 is a clinical study titled "Clinical Study to Investigate the Urinary Excretion of N-nitrosodimethylamine (NDMA) After Ranitidine Administration". Ranitidine is an over-the-counter and prescription drug, which decreases the amount of acid secreted by the stomach. Some ranitidine medicines contain an impurity called N-nitrosodimethylamine (NDMA) at low levels. NDMA is classified as a probable human carcinogen (a substance that could cause cance...
What is the current status of trial NCT04397445?
This trial is currently completed. It is a Phase 1 study. The enrollment target is 18 participants. The study started on 2020-06-08. Estimated completion is 2020-07-01.
What conditions does trial NCT04397445 study?
This clinical trial studies the following conditions: Pharmacokinetics, Food-drug Interaction, Ranitidine Adverse Reaction.
What interventions are being tested in trial NCT04397445?
The interventions under investigation include: Placebo (DRUG), Ranitidine (DRUG), Low nitrite/NDMA meals (OTHER), High nitrite/NDMA meals (OTHER).
Who is sponsoring clinical trial NCT04397445?
This trial is sponsored by Food and Drug Administration (FDA), which has 23 total clinical trials registered on ClinicalTrials.gov.
Where is trial NCT04397445 being conducted?
This trial has 1 study location across Wisconsin. Contact the study sites directly through ClinicalTrials.gov for enrollment availability.
Learn More About Clinical Trials
Similar trials for Pharmacokinetics
Matched on the same primary condition, ranked to surface studies in the same phase first, then by recruiting status, no relevance scoring or editorial curation.
Where NCT04397445's enrollment target sits among peer trials
18 27th of 37 higher than 9 of 37 other Pharmacokinetics trials
participants (enrollment target), bucketed by value
Each bar is a band; taller bars hold more other Pharmacokinetics trials. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count and share, and where it sits relative to this entry.
Source ClinicalTrials.gov registry export · 2026-08-08
-
Phase1/2a Study for IPG7236 in Patients With Advanced Solid Tumors
RECRUITING · Phase 1
-
High Potency Cannabis: Acute and Protracted Effects
RECRUITING · Phase 1
-
Comparing the Extent to Which Two Evolocumab Drug Products Are Made Available in the Body After a Single Subcutaneous Dose
RECRUITING · Phase 1
-
Single Dose Study, Pharmacokinetics of Oxycodone and PF614 Co-Administered With Nafamostat (PF614-MPAR-102)
RECRUITING · Phase 1
-
Safety and PK of Ceftibuten-ledaborbactam Etzadroxil Fixed-dose Combination
RECRUITING · Phase 1
-
A Study to Investigate Lithium Brain/Plasma Pharmacokinetics and Safety of an AL001 Oral Capsule Compared to a Marketed Immediate-release Lithium Carbonate Capsule in Healthy Adult Subjects
ACTIVE NOT RECRUITING · Phase 1
Nationwide trials with similar profiles
Cross-condition peers matched on enrollment target and registry start date, not the same-condition list above.
Similar enrollment target
- NCT01245179 · 18 participants · Phase 1
Study of Panobinostat (LBH589) in Patients With Sickle Cell Disease
- NCT01999361 · 18 participants · NA
Prevention of de Novo Allosensitization in Islet Transplant Recipients Following Complete Graft Loss
- NCT02359825 · 18 participants · Phase 1
Nerve Repair Using Hydrophilic Polymers to Promote Immediate Fusion of Severed Axons and Swift Return of Function
- NCT02870244 · 18 participants · Phase 1
Adoptive T Cell Immunotherapy for Advanced Melanoma Using Engineered Lymphocytes
Similar registry start date
- NCT05962346 · started 2026-12 · NA
Fetal Endoscopic Tracheal Occlusion for Congenital Diaphragmatic Hernia
- NCT07125183 · started 2026-12 · Phase 2
Study on Efficacy and Tolerability of Weekly Doxorubicin in Elderly Patients With Advanced or Metastatic Leiomyosarcoma
- NCT07292298 · started 2026-11 · Phase 2
Phase 2 Single-Arm Rectal Cancer Brachytherapy for Patients With Low-Lying Residual Adenocarcinoma After Total Neoadjuvant Therapy to Improve Organ Preservation Rates
- NCT04263285 · started 2026-10 · NA
Treatment of Depression Post-SCI