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Related Concept Videos

Clinical Trials01:16

Clinical Trials

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Clinical trials are prospective experimental studies conducted on humans to determine the safety and efficacy of treatments, drugs, diet methods, and medical devices. Using statistics in clinical trials enables researchers to derive reasonable and accurate conclusions from the collected data, allowing them to make wise decisions in uncertain situations. In medical research, statistical methods are crucial for preventing errors and bias.
There are four phases in a clinical trial. A phase one...
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Clinical Trials: Overview01:11

Clinical Trials: Overview

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Clinical development focuses on how the drug will interact with the human body and encompasses four key phases of clinical trials, each serving a specific purpose in assessing the safety and effectiveness of new drugs. These phases overlap and build upon one another. Phase I involves a small group of healthy volunteers (typically 20-80 individuals) or, in cases where significant toxicity is expected, patients with the targeted disease, such as cancer or AIDS. The volunteers are tested for...
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Preclinical Development: Overview01:28

Preclinical Development: Overview

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Preclinical development consists of a series of tests that ensure the safety and efficacy of a new therapeutic compound before it is tested in humans. There are four main phases to this process. First, safety pharmacology tests are conducted to ensure the drug does not produce any acutely harmful effects. These tests examine parameters such as bronchoconstriction, cardiac dysrhythmias, blood pressure changes, and ataxia. Next, preliminary toxicological testing is performed to determine the...
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Study Designs in Epidemiology01:20

Study Designs in Epidemiology

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Epidemiological study designs are fundamental tools for investigating the distribution, determinants, and control of health conditions in populations. They help researchers understand the relationships between exposures and outcomes, and they broadly fall into two categories: "observational" and "experimental" studies.
Observational studies are those where the researcher does not intervene but rather observes natural variations. They include cross-sectional, cohort, and...
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Types of Biopharmaceutical Studies: Controlled and Non-Controlled Approaches01:23

Types of Biopharmaceutical Studies: Controlled and Non-Controlled Approaches

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Biopharmaceutical studies constitute a vital field aiming to enhance drug delivery methods and refine therapeutic approaches, drawing upon diverse interdisciplinary knowledge. In research methodologies, the choice between controlled and non-controlled studies significantly influences the study's reliability and accuracy.
Non-controlled studies, commonly employed for initial exploration, lack a control group, rendering them susceptible to biases and external influences. In contrast,...
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Drug Administration and Therapy Phases: Overview01:26

Drug Administration and Therapy Phases: Overview

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Drugs, the chemical agents used in diagnosing, treating, or preventing diseases, undergo a four-phase process of development: pharmaceutic, pharmacokinetics, pharmacodynamics, and therapeutic.
The pharmaceutical phase focuses on leveraging the physicochemical properties of the drug to design and manufacture an effective product. Variants include orally administered tablets or capsules, topical creams or ointments, and parenteral-delivery solutions or emulsions.
The pharmacokinetic phase...
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A Clinical Trial Assessing the Safety, Efficacy, and Delivery of Olive-Oil-Based Three-Chamber Bags for Parenteral Nutrition
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Low-intervention clinical trials in Spain: Do they progress?

Claudia Erika Delgado-Espinoza1,2,3, Mayro J Cortés Pestana1,2,3, Kristopher Amaro1,2,3

  • 1Department of Pharmacology and Therapeutics, Universitat Autònoma de Barcelona (UAB), Barcelona, Spain.

British Journal of Clinical Pharmacology
|December 17, 2025
PubMed
Summary

Low-Intervention Clinical Trials (LICTs) remain a small fraction of studies in Spain, primarily non-commercial and evaluating authorized drugs. Their designs could be more robust, but recent regulatory changes show no impact on LICT activity.

Keywords:
clinical trialslow‐intervention clinical trialsnon‐commercial clinical researchregulation

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Area of Science:

  • Clinical pharmacology
  • Regulatory science
  • Health services research

Background:

  • Low-Intervention Clinical Trials (LICTs) are pragmatic studies of authorized medicines.
  • Simplified regulations were introduced in 2014 to support non-commercial clinical trials (NCCTs).
  • The Clinical Trials Information System (CTIS) implementation in 2023 may affect LICT feasibility.

Purpose of the Study:

  • To describe the characteristics of LICTs approved in Spain from 2014 to 2023.
  • To assess the impact of regulatory changes and CTIS on LICTs.

Main Methods:

  • Cross-sectional descriptive analysis of LICTs.
  • Data sourced from the Spanish Clinical Studies Registry (REec) (2014-2023).

Main Results:

  • LICTs represented 3.8% (322/8497) of all trials registered.
  • Most LICTs were non-commercially sponsored, phase IV, monocentric, and evaluated authorized drugs.
  • Efficacy/safety were primary objectives; pharmacoeconomics and bioequivalence were less common. Designs were often randomized but rarely blinded or placebo-controlled.

Conclusions:

  • LICTs are crucial for real-world evidence but remain a small proportion of trials in Spain.
  • LICT designs have room for improvement in robustness.
  • CTIS implementation did not appear to affect LICT activity in 2023.