Researchers collect blood to solve mystery of drug side effects
NCT ID NCT02154022
First seen Jun 27, 2026 · Last updated Sep 01, 2026 · Updated 18 times
Summary
This study collects blood samples from people already in other NIH clinical trials who are having or are expected to have serious side effects from their drugs. The goal is to measure drug levels in the blood to better understand why side effects happen. Up to 100 participants aged 2 and older will give blood samples. This is an observational study, not a test of a new treatment.
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Study facts
What this study's own registry entry says, in plain language.
- Participants
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About 100 people
The number the study aims to enrol. It can still change while the study runs.
- Started
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Jul 2014
- Expected to finish
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May 2030
An estimate. End dates often move.
- Lead sponsor
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A government research agency
The lead sponsor is the US National Institutes of Health.
Who can take part
This study's own entry requirements. Only the study team can say for certain whether you qualify.
Who is studied
Any participants greater than or equal to 2 years of age who are currently enrolled in IRB approved NIH Intramural Research Program (IRP) clinical trials are eligible.
- Ages
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2 years and older
- Sex
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Anyone
- Healthy volunteers
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Accepted
You do not need to have the condition being studied to take part.
Show the full entry requirements Hide the full entry requirements
Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.
* INCLUSION CRITERIA: * Any individuals greater than or equal to 2 years of age who are currently enrolled in IRB approved NIH Intramural Research Program (IRP) clinical trials are eligible. (Exception: Participants \<18 years old will not be eligible for probe administration.) * Ability of subject or a Legally Authorized Representative (LAR) to understand and the willingness to sign a written informed consent document. * Individuals who have received or are anticipated to receive an investigational agent or FDA approved therapy at the NIH who meet one of the following criteria: * Individuals in whom altered pharmacokinetics are anticipated to occur based on pharmacogenetics, history of toxicities with similar agents, drug interactions, or other patient-specific factors which may alter absorption, distribution, metabolism, or excretion. OR, \-- Individuals who are exhibiting unusual response or toxicity that is believed to be due to high drug concentration in order to assess the cause of toxicity and adverse events.
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Conditions
The condition(s) this trial relates to.
As listed by the trial registrant
The condition terms exactly as the trial's registrant entered them.
How to take part
Only the study team decides who joins. These are the ways to reach them.
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The places running it
1 site. The list below names each one and where it is.
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The official record
The full official record for this study. This one lists no contact details, but it is the first place any would appear.
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A doctor treating you
A doctor who knows your case can contact a study site on your behalf, and can tell you whether this study is worth pursuing at all.
Contacts and locations
Locations
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National Institutes of Health Clinical Center
Bethesda, Maryland, 20892, United States
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Other studies related to the condition(s) this trial covers.
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