Nii Addy is an American neuroscientist who is an Associate Professor of Psychiatry at the Yale School of Medicine. His research considers the neurobiological basis of substance use disorders, depression, and anxiety. He has worked on various initiatives to mitigate tobacco use and addiction.

Addy earned his bachelor's degree at Duke University in 2000.^[1][2] He moved to Yale University for his doctoral studies, and graduated in 2010.^[1][3]

After earning his doctoral degree Addy was appointed to the faculty at the Yale School of Medicine.^[3] At Yale School of Medicine, Addy leads a laboratory investigating the mechanisms of reinforcement learning and motivational control.^[4] He has investigated the impact of vaping on teenager's brains.^[5]

• Picciotto, Marina R.; Addy, Nii A.; Mineur, Yann S.; Brunzell, Darlene H. (2008-04-01). "It is not "either/or": Activation and desensitization of nicotinic acetylcholine receptors both contribute to behaviors related to nicotine addiction and mood". Progress in Neurobiology. 84 (4): 329–342. doi:10.1016/j.pneurobio.2007.12.005. ISSN 0301-0082. PMC 2390914. PMID 18242816.
• Levin, Edward D; Addy, Nii; Nakajima, Aya; Christopher, N.Channelle; Seidler, Frederic J; Slotkin, Theodore A (2001). "Persistent behavioral consequences of neonatal chlorpyrifos exposure in rats". Developmental Brain Research. 130 (1): 83–89. doi:10.1016/s0165-3806(01)00215-2. ISSN 0165-3806. PMID 11557096.
• Addy, Nii A; Nakijama, Aya; Levin, Edward D (2003). "Nicotinic mechanisms of memory: effects of acute local DHβE and MLA infusions in the basolateral amygdala". Cognitive Brain Research. 16 (1): 51–57. doi:10.1016/s0926-6410(02)00209-4. ISSN 0926-6410. PMID 12589888.