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
Deep brain stimulation and other surgical implants have long been used in neuropsychiatric research as an investigational treatment in cases of severe mental illness, including treatment-resistant depression.
—
Naveen Rao, Forbes.com, 2 Apr. 2025
The company plans to submit three investigational new drug applications to the FDA within the next 12 to 24 months, starting with HWK-007 for solid tumors in the second half of 2025.
—Quartz Intelligence Newsroom, Quartz, 28 Mar. 2025
The January 25 procedure took place through the US Food and Drug Administration’s Expanded Access pathway, often known as compassionate use, which allows patients with life-threatening conditions to access investigational medical products.
—Nadia Kounang, CNN, 7 Feb. 2025
The company recently announced that the FDA has granted fast track designation to its investigational biologic – Posdinemab – for treating patients with early Alzheimer’s disease.
—Trefis Team, Forbes, 10 Jan. 2025
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Naveen Rao, Forbes.com, 2 Apr. 2025
The company plans to submit three investigational new drug applications to the FDA within the next 12 to 24 months, starting with HWK-007 for solid tumors in the second half of 2025.
—Quartz Intelligence Newsroom, Quartz, 28 Mar. 2025
The January 25 procedure took place through the US Food and Drug Administration’s Expanded Access pathway, often known as compassionate use, which allows patients with life-threatening conditions to access investigational medical products.
—Nadia Kounang, CNN, 7 Feb. 2025
The company recently announced that the FDA has granted fast track designation to its investigational biologic – Posdinemab – for treating patients with early Alzheimer’s disease.
—Trefis Team, Forbes, 10 Jan. 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 16 Apr. 2025.
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