Atomoxetine HCl

Catalog No.S3175 Synonyms: LY 139603 HCl

For research use only.

Atomoxetine (LY 139603) is a selective norepinephrine (NE) transporter inhibitor with Ki of 5 nM, with 15- and 290-fold lower affinity for human 5-HT and DA transporters.

Atomoxetine HCl Chemical Structure

CAS No. 82248-59-7

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Biological Activity

Description Atomoxetine (LY 139603) is a selective norepinephrine (NE) transporter inhibitor with Ki of 5 nM, with 15- and 290-fold lower affinity for human 5-HT and DA transporters.
Norepinephrine (NE) transporter [1] 5-HT [1] DA transporter [1]
5 nM(Ki) 77 nM(Ki) 1451 nM(Ki)
In vitro

Atomoxetine is a selective norepinephrine reuptake inhibitor with Ki of 5 nM, compared with 77 and 1451 nM for binding to serotonin and dopamine transporters. [1]

In vivo In microdialysis studies, atomoxetine increases extracellular (EX) levels of NE in prefrontal cortex (PFC) 3-fold, but does not alter 5-HTEX levels. Atomoxetine also increases DAEX concentrations in PFC 3-fold, but does not alter DAEX in striatum or nucleus accumbens. Atomoxetine increases Fos by 3.7-fold in PFC, but not in the striatum or nucleus accumbens. [1] Atomoxetine selectively inhibits the presynaptic uptake of norepinephrine in adrenergic neurons in animals, and has activity in animal models of depression. [2][3]

Protocol (from reference)

Solubility (25°C)

In vitro

DMSO 58 mg/mL
(198.75 mM)
Ethanol 37 mg/mL
(126.79 mM)
Water 2 mg/mL
(6.85 mM)

* Please note that Selleck tests the solubility of all compounds in-house, and the actual solubility may differ slightly from published values. This is normal and is due to slight batch-to-batch variations.

Chemical Information

Molecular Weight 291.82


CAS No. 82248-59-7
Storage 3 years -20°C powder
2 years -80°C in solvent

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Method for preparing in vivo formulation: Take μL DMSO master liquid, next add μL Corn oil, mix and clarify.

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Molarity Calculator

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Clinical Trial Information

NCT Number Recruitment Interventions Conditions Sponsor/Collaborators Start Date Phases
NCT05101122 Recruiting Drug: Dosing 1: Atomoxetine|Drug: Dosing 2-4: AD313 Obstructive Sleep Apnea Apnimed October 6 2021 Phase 1|Phase 2
NCT03460210 Recruiting Drug: Atomoxetine Obesity Morbid Norwegian University of Science and Technology|St. Olavs Hospital|Volvat Medisinsk Senter Stokkan|Namsos Hospital|Alesund Hospital November 2 2016 --
NCT01522404 Completed Drug: Atomoxetine|Drug: Placebo Mild Cognitive Impairment Emory University|National Institute on Aging (NIA) March 2012 Phase 2
NCT01709695 Completed Drug: Guanfacine Hydrochloride XR|Drug: Placebo ADHD|Attention Deficit Hyperactivity Disorder Icahn School of Medicine at Mount Sinai March 2011 Phase 4
NCT02014064 Completed Drug: Atomoxetine|Other: Placebo Continuous Methamphetamine Dependence|Methamphetamine Dependence in Remission University of California Los Angeles August 2009 Phase 1

(data from, updated on 2022-01-17)

Tech Support

Answers to questions you may have can be found in the inhibitor handling instructions. Topics include how to prepare stock solutions, how to store inhibitors, and issues that need special attention for cell-based assays and animal experiments.

Handling Instructions

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