Dose-ranging study

Dose-ranging study is a type of clinical trial where different doses of an investigational drug are tested to establish the dose which is both safe and effective. The main goal of a dose-ranging study is to determine the dose-response relationship of a new drug.

Overview

In a dose-ranging study, multiple doses of a drug are tested in parallel to evaluate the pharmacological effect at different dose levels. This type of study is typically performed in the early phases of clinical development after initial safety of the drug has been established through Phase I trials. The results of dose-ranging studies are used to establish the optimal dose for subsequent Phase III trials.

Design

The design of a dose-ranging study can vary depending on the drug and disease in question. However, most dose-ranging studies are randomized, double-blind, and placebo-controlled. Participants are randomly assigned to different dose groups, including a placebo group. The investigators and participants are blinded to the treatment assignments.

Outcome Measures

The primary outcome measure in a dose-ranging study is usually a biomarker or clinical endpoint that can be measured in a relatively short time. The choice of outcome measure depends on the drug and disease in question. The dose-response relationship is then established based on the observed changes in the outcome measure across the different dose groups.

Limitations

One of the main limitations of dose-ranging studies is that they are usually conducted in a relatively small number of participants and over a short period of time. Therefore, they may not detect all possible side effects of a drug, especially those that occur infrequently or over a long period of time. Furthermore, the dose-response relationship established in a dose-ranging study may not necessarily predict the long-term effectiveness or safety of the drug.

See Also

• Clinical trial
• Phase I clinical trial
• Phase III clinical trial
• Randomized controlled trial
• Double-blind study
• Placebo