chemistry

Tedatioxetine

Tedatioxetine is a chemistry topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Tedatioxetine rather than just read about it. In short: Tedatioxetine (developmental code name Lu AA24530) is an experimental antidepressant developed by H. Lundbeck A/S for the treatment of major depressive disorder (MDD) and generalized anxiety disorder (GAD).

Key takeaways

Tedatioxetine belongs to chemistry; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Tedatioxetine to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Tedatioxetine from memory before moving on to harder problems.

Reference excerpt

Tedatioxetine (developmental code name Lu AA24530) is an experimental antidepressant developed by H. Lundbeck A/S for the treatment of major depressive disorder (MDD) and generalized anxiety disorder (GAD). It acts as a triple reuptake inhibitor (TRI) with preference for serotonin and norepinephrine over dopamine, and as an antagonist at 5-HT2A, 5-HT2C, 5-HT3, and α1A-adrenergic receptors. In 2007 Lundbeck and Takeda entered into a partnership that included tedatioxetine but was focused on another, more advanced Lundbeck drug candidate, vortioxetine. Tedatioxetine reached Phase II clinical trials for major depressive disorder in 2009 but was discontinued in May 2016, with no further development reported. Despite its termination, data from clinical studies have provided valuable insights into CYP2D6 metabolism and pharmacogenetics.

Pharmacology

Pharmacokinetics Tedatioxetine is a sensitive substrate of the CYP2D6 enzyme, exhibiting significant interindividual variability in metabolism due to genetic polymorphisms. A 2021 population pharmacokinetic (popPK) study involving 578 subjects quantified CYP2D6 activity across genotypes, reporting mean oral clearances of 18 L/h for poor metabolizers (PMs), 40 L/h for intermediate metabolizers (IMs), 60 L/h for normal metabolizers (NMs), and 77 L/h for ultrarapid metabolizers (UMs). Approximately 80% of clearance is mediated by CYP2D6. The drug has a slow absorption rate, with a median time to maximum plasma concentration (tmax) of 5–6 hours. Its primary metabolite, Lu AA37208, shows a similar or shorter tmax, indicating presystemic metabolism. The study highlighted low enzyme activity for CYP2D6*17 and *41 alleles, suggesting a need to revise activity scores for personalized dosing. CYP2D6 variability posed challenges for consistent dosing across populations, particularly for CYP2D6*17 and *41 carriers.

Pharmacodynamics Tedatioxetine is a multimodal antidepressant that inhibits the reuptake of serotonin, norepinephrine, and dopamine, with a preference for serotonin and norepinephrine (5-HT > NE > DA). It also antagonizes 5-HT2A, 5-HT2C, and 5-HT3 serotonin receptors and α1A-adrenergic receptor antagonist, potentially enhancing monoamine transmission and reducing side effects like nausea associated with 5-HT3 activation. Preclinical studies suggest this profile may improve efficacy in MDD by targeting multiple neurotransmitter systems. The compound’s receptor antagonism, particularly at 5-HT2C and 5-HT3, may contribute to its anxiolytic properties, making it a candidate for GAD treatment. Its triple reuptake inhibition distinguishes it from selective serotonin reuptake inhibitors (SSRIs), potentially offering broader symptom relief in complex mood disorders.

Clinical development Tedatioxetine was discovered by Lundbeck and entered a partnership with Takeda Pharmaceutical Company in 2007, alongside the more advanced candidate vortioxetine. By 2009, tedatioxetine had progressed to Phase II clinical trials for MDD, demonstrating promising efficacy and safety in preliminary studies. However, Lundbeck and Takeda prioritized vortioxetine, which gained regulatory approval, leading to tedatioxetine’s removal from Lundbeck’s pipeline by August 2013. On 10 May 2016, all development was officially discontinued. A Chinese patent (WO 2009109541) indicates interest in tedatioxetine’s synthesis outside Lundbeck, suggesting potential for further research, though no active development has been reported. The discontinuation reflects the competitive MDD market, with patent expiries for drugs like Cymbalta and Abilify and the launch of vortioxetine in 2014.

Synthesis Tedatioxetine’s synthesis, as described in patents (WO 2003/029232, WO 2009109541), involves challenges with low yield and purification difficulties. Early methods required hazardous reagents like butyl lithium and low-temperature reactions, limiting industrial scalability. Improved routes replaced benzyl with Boc-protecting groups and used trifluoroacetic acid (TFA) and triethylsilane for dehydroxylation, but high-cost starting materials (e.g., 2-bromoiodobenzene, palladium catalysts) and safety concerns persisted.

See also MIN-117 TGBA01AD Vilazodone Vortioxetine Triple reuptake inhibitor Major depressive disorder Generalized anxiety disorder CYP2D6 Serotonin receptor antagonist

References

External links Lu AA24530 shows positive results in major depressive disorder phase II study PubChem – Tedatioxetine ChEBI – Tedatioxetine DrugBank – Tedatioxetine

Illustrations

Worked examples

Example 1 — a first encounter with Tedatioxetine

Start with the simplest possible case. Write down what Tedatioxetine claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In chemistry, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Tedatioxetine before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Tedatioxetine ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Tedatioxetine

In research: Tedatioxetine appears in chemistry research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses Tedatioxetine in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: Tedatioxetine is common in secondary-school and first-year university syllabi. It links to neighbouring topics 4-Piperidinyl compounds, Abandoned drugs, Antidepressants, so understanding it makes those chapters shorter.
In everyday life: Look for Tedatioxetine outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study Tedatioxetine in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Tedatioxetine means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain Tedatioxetine out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Tedatioxetine in simple terms?

Why does Tedatioxetine matter?

Because it connects several chemistry ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Tedatioxetine?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Tedatioxetine.