investigational
adjective
in·ves·ti·ga·tion·al
in-ˌve-stə-ˈgā-sh(ə-)nəl 
1
: of or relating to investigation
investigational activities
2
: relating to or being a drug or medical procedure that is not approved for general use but is under investigation in clinical trials regarding its safety and efficacy
an investigational new drug
Examples of investigational in a Sentence
Recent Examples on the Web
Generation Bio plans to announce the target and indication of its lead T cell-selective LNP-siRNA program for autoimmune disease by mid-year 2025, with an investigational new drug (IND) application submission expected in the second half of 2026.
—
Quartz Intelligence Newsroom, Quartz, 13 Mar. 2025
Most cases come after the health insurance company asserted the service was experimental, investigational, not medically necessary, a clinical trial, or a treatment for a rare disease.
—David Robinson, USA TODAY, 7 Feb. 2025
The traditional approach requires pharmaceutical companies to conduct extensive clinical trials involving hundreds or thousands of patients, randomized to either receive the investigational treatment or a placebo.
—Greg Licholai Md, Forbes.com, 5 May 2025
Schmid worries their absence could impact the implementation of a new investigational PrEP medication that, if approved, would only need to be administered twice a year.
—Joseph Choi, The Hill, 15 Apr. 2025
See All Example Sentences for investigational
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Quartz Intelligence Newsroom, Quartz, 13 Mar. 2025
Most cases come after the health insurance company asserted the service was experimental, investigational, not medically necessary, a clinical trial, or a treatment for a rare disease.
—David Robinson, USA TODAY, 7 Feb. 2025
The traditional approach requires pharmaceutical companies to conduct extensive clinical trials involving hundreds or thousands of patients, randomized to either receive the investigational treatment or a placebo.
—Greg Licholai Md, Forbes.com, 5 May 2025
Schmid worries their absence could impact the implementation of a new investigational PrEP medication that, if approved, would only need to be administered twice a year.
—Joseph Choi, The Hill, 15 Apr. 2025
See All Example Sentences for investigational
Cite this Entry
“Investigational.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/investigational. Accessed 21 Jun. 2025.
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