Austedo's active ingredients, deutetrabenazine and its active metabolite HTBZ-18, have specific elimination half-lives. Deutetrabenazine has an elimination half-life of approximately 17 to 19 hours. The active metabolite, HTBZ-18, has a longer elimination half-life, ranging from 45 to 61 hours [1].
How Long Does Austedo Stay in Your System?
Given the half-lives of its components, Austedo and its active metabolite will gradually be eliminated from the body. The longer half-life of the active metabolite suggests it will persist in the system for a more extended period compared to the parent drug.
Why Does Austedo Have a Longer Half-Life Than Tetrabenazine?
Austedo contains deutetrabenazine, which is a deuterium-labeled form of tetrabenazine. The deuterium atoms in deutetrabenazine replace certain hydrogen atoms, which can alter the drug's metabolism. This modification is designed to slow down the rate at which the drug is broken down by enzymes in the body, leading to a longer half-life for deutetrabenazine and its active metabolite compared to tetrabenazine [1]. This slower metabolism may allow for less frequent dosing.
What is the Recommended Dosing Schedule for Austedo?
Austedo is typically taken twice daily [2]. The dosing is initiated at a low dose and then gradually increased based on response and tolerability [3].
What Are the Potential Side Effects of Austedo?
Common side effects associated with Austedo include insomnia, depression, anxiety, and upper respiratory tract infection [4]. More serious side effects can occur, such as parkinsonism and neuroleptic malignant syndrome [5].
How is Austedo Different from Tetrabenazine?
Austedo (deutetrabenazine) is a deuterium-modified version of tetrabenazine. The key difference lies in the chemical structure; deutetrabenazine has deuterium atoms incorporated, which affects its metabolic pathway and results in a longer half-life for both the parent drug and its active metabolite compared to tetrabenazine [1]. This difference in metabolism can influence dosing frequency and potentially side effect profiles.
What Are the Regulatory Approvals for Austedo?
Austedo is approved by the U.S. Food and Drug Administration (FDA) for the treatment of chorea associated with Huntington's disease and tardive dyskinesia [6].
Are There Any Drug Interactions with Austedo?
Austedo can interact with other medications. It is important to inform a healthcare provider about all medications being taken, including over-the-counter drugs and herbal supplements, as some interactions can increase the risk of side effects or affect the efficacy of Austedo [7].
Where Can I Find More Information on Austedo's Patent Status?
Information regarding the patent status and exclusivity of drugs like Austedo can be found on resources such as DrugPatentWatch.com [8].
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1. Austedo Prescribing Information.
2. Austedo Patient Information.
3. Austedo Dosing Information.
4. Austedo Common Side Effects.
5. Austedo Serious Side Effects.
6. FDA Approval of Austedo.
7. Austedo Drug Interactions.
8. DrugPatentWatch.com