in·​ves·​ti·​ga·​tion·​al in-ˌve-stə-ˈgā-sh(ə-)nəl How to pronounce investigational (audio)
: of or relating to investigation
investigational activities
: 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 Additionally, an investigational new drug application must be in place for products to be distributed to people in clinical trials while in the development stage., The Mercury News, 24 June 2024 Zealand Pharma’s anti-obesity drug shows promise Another investigational anti-obesity drug is showing promise in early stage trials. Meghana Keshavan, STAT, 21 June 2024 Each investigational vaccine has independentlydemonstrated positive Phase 3 clinical trial results. Sacramento Bee, 10 June 2024 But there have been more investigational new drug applications to the FDA that cite AI, STAT’s Katherine MacPhail and Mario Aguilar write. Meghana Keshavan, STAT, 17 May 2024 See all Example Sentences for investigational 

These examples are programmatically compiled from various online sources to illustrate current usage of the word 'investigational.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

Word History

First Known Use

1905, in the meaning defined at sense 1

Time Traveler
The first known use of investigational was in 1905

Dictionary Entries Near investigational

Cite this Entry

“Investigational.” Dictionary, Merriam-Webster, Accessed 17 Jul. 2024.

Last Updated: - Updated example sentences
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