{"id":60795,"date":"2024-02-28T07:08:53","date_gmt":"2024-02-28T07:08:53","guid":{"rendered":"https:\/\/medsname.com\/atrest\/"},"modified":"2026-05-01T10:49:16","modified_gmt":"2026-05-01T10:49:16","slug":"atrest","status":"publish","type":"product","link":"https:\/\/medsbase.com\/da\/atrest\/","title":{"rendered":"Atrest"},"content":{"rendered":"<p><!-- medsbase-tldr-answer --><\/p>\n<div style=\"background:#fff8e1;border-left:4px solid #f5a623;padding:18px 22px;margin:0 0 24px 0;border-radius:4px;\">\n<h3 class=\"wp-block-heading\" style=\"margin:0 0 8px 0;font-size:16px;font-weight:700;\">&#9889; Quick Answer &mdash; What is Atrest?<\/h3>\n<p style=\"margin:0;\"><strong>Atrest<\/strong> er en oral <strong>tetrabenazine<\/strong> (12.5 mg) tablet \u2014 a <strong>VMAT2 (vesicular monoamine transporter 2) inhibitor<\/strong> specifically approved for the treatment of <strong>chorea associated with Huntington disease<\/strong>. It works by depleting dopamine from nerve terminals, reducing the involuntary writhing and jerking movements that characterise Huntington chorea. Starting dose: <strong>12,5 mg en gang dagligt<\/strong>, increased weekly by 12.5 mg to a maximum of <strong>37.5 mg\/dose (75&ndash;100 mg\/day)<\/strong>, always divided into 2&ndash;3 doses. Patients receiving &gt;50 mg\/day require <strong>CYP2D6 genotyping<\/strong>. Common side effects: sedation, akathisia, depression, parkinsonism, insomnia. <strong>Black-box warning:<\/strong> increases risk of depression and suicidality in Huntington patients \u2014 monitor mood closely.<\/p>\n<\/div>\n<div class=\"medsbase-trust-strip\" style=\"background:#f4f8fb;border:1px solid #d8e3eb;padding:12px 16px;margin:16px 0;border-radius:4px;font-size:14px;\">\n<strong>Hvad du f\u00e5r med MedsBase:<\/strong> WHO-GMP certificeret producent \u00b7 Diskret emballage \u00b7 Verdensomsp\u00e6ndende forsendelse \u00b7 1.400+ verificerede <a href=\"https:\/\/medsbase.com\/da\/reviews\/\">kundeanmeldelser<\/a>\n<\/div>\n<p class=\"medsbase-reship-line\" style=\"font-size:14px;color:#444;margin:8px 0 18px;\">\ud83d\udce6 Hver ordre er d\u00e6kket af vores <a href=\"https:\/\/medsbase.com\/da\/medsbase-re-shipment-assurance-policy\/\"><strong>Reshipment Assurance Policy<\/strong><\/a> \u2014 hvis din pakke ikke ankommer inden for 20 hverdage, sender vi en erstatning.<\/p>\n<h3>Hvorfor bestille fra MedsBase<\/h3>\n<p>Vores generiske medicin kommer fra WHO-GMP certificerede producenter og sendes verdensomsp\u00e6ndende i diskret, neutral emballage \u2014 ingen medicinnavn p\u00e5 pakkens ydre. Kortbetalinger h\u00e5ndteres af en reguleret processor (kontoudtogsbeskrivelser inkluderer en reguleret betalingsprocessor \u2014 aldrig \u201cMedsBase\u201d eller medicinnavn). Crypto og SEPA bankoverf\u00f8rsel accepteres ogs\u00e5. Hver ordre er d\u00e6kket af vores Reshipment Assurance Policy.<\/p>\n<h2 class=\"wp-block-heading\">What Is Atrest?<\/h2>\n<p>Atrest is an oral tablet containing <strong>tetrabenazine 12.5 mg<\/strong>. Tetrabenazine is a <strong>vesicular monoamine transporter 2 (VMAT2) inhibitor<\/strong> &mdash; the first drug specifically approved for the treatment of <strong>chorea associated with Huntington disease<\/strong>.<\/p>\n<p>By depleting presynaptic dopamine stores, tetrabenazine reduces the involuntary, dance-like movements (chorea) that characterise Huntington disease without the tardive dyskinesia risk of traditional dopamine receptor blockers. It was first used in Europe in the 1970s and gained FDA approval in 2008 as <strong>Xenazine<\/strong>. Atrest is manufactured by a WHO-GMP certified facility and is bioequivalent to the originator brand at the same strength.<\/p>\n<h2 class=\"wp-block-heading\">How Does Atrest (Tetrabenazine) Work?<\/h2>\n<p>Tetrabenazine irreversibly inhibits <strong>VMAT2<\/strong>, the protein responsible for packaging dopamine, serotonin, and norepinephrine into synaptic vesicles. By blocking VMAT2, the drug depletes presynaptic monoamine stores \u2014 predominantly dopamine in the basal ganglia. Excessive dopaminergic activity in the striatum is the primary driver of choreiform movements in Huntington disease, so reducing dopamine availability at the post-synaptic receptor directly suppresses chorea.<\/p>\n<p>The drug is extensively metabolised by CYP2D6 into two active metabolites (&alpha;-HTBZ and &beta;-HTBZ) that account for most of the clinical effect. <strong>CYP2D6 poor metabolisers<\/strong> have significantly higher plasma levels, which is why genotyping is required before exceeding 50 mg\/day.<\/p>\n<h2 class=\"wp-block-heading\">Dosering og administration<\/h2>\n<table style=\"width:100%;border-collapse:collapse;margin:0 0 24px 0;\">\n<thead>\n<tr style=\"background:#2c7cb0;color:#fff;\">\n<th style=\"padding:10px 14px;text-align:left;\">Uge<\/th>\n<th style=\"padding:10px 14px;text-align:left;\">Daily Dose<\/th>\n<th style=\"padding:10px 14px;text-align:left;\">Doseringsskema<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td style=\"padding:10px 14px;\">Uge 1<\/td>\n<td style=\"padding:10px 14px;\">12,5 mg<\/td>\n<td style=\"padding:10px 14px;\">Once daily (morning)<\/td>\n<\/tr>\n<tr style=\"background:#f9f9f9;\">\n<td style=\"padding:10px 14px;\">Uge 2<\/td>\n<td style=\"padding:10px 14px;\">25 mg<\/td>\n<td style=\"padding:10px 14px;\">12.5 mg twice daily<\/td>\n<\/tr>\n<tr>\n<td style=\"padding:10px 14px;\">Week 3+<\/td>\n<td style=\"padding:10px 14px;\">37.5&ndash;50 mg<\/td>\n<td style=\"padding:10px 14px;\">Divided into 2&ndash;3 doses<\/td>\n<\/tr>\n<tr style=\"background:#f9f9f9;\">\n<td style=\"padding:10px 14px;\">Maksimum<\/td>\n<td style=\"padding:10px 14px;\">75&ndash;100 mg\/day*<\/td>\n<td style=\"padding:10px 14px;\">*CYP2D6 genotyping required &gt;50 mg\/day<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>Tag med eller uden mad. <strong>No single dose should exceed 37.5 mg.<\/strong> If treatment is interrupted for &gt;5 days, re-titrate from 12.5 mg.<\/p>\n<h2 class=\"wp-block-heading\">Bivirkninger<\/h2>\n<div style=\"background:#fff3f3;border-left:4px solid #d9534f;padding:16px 20px;margin:0 0 16px 0;border-radius:4px;\"><strong>&#9888; Black-box warning \u2014 Depression &amp; suicidality:<\/strong> Tetrabenazine increases the risk of depression and suicidal thoughts\/behaviour in patients with Huntington disease. Do not use in patients who are actively suicidal or have untreated\/inadequately treated depression. Patients and caregivers should be alerted to monitor for emerging or worsening depression, suicidality, or unusual changes in behaviour.<\/div>\n<p><strong>Almindelige (\u226510%):<\/strong> sedation\/somnolence, fatigue, insomnia, depression, akathisia (restlessness), anxiety, nausea.<\/p>\n<p><strong>Alvorlige:<\/strong> parkinsonism (dose-related), neuroleptic malignant syndrome (rare), QTc prolongation (avoid in congenital long-QT syndrome), dysphagia (increased aspiration risk in Huntington patients).<\/p>\n<h2 class=\"wp-block-heading\">Advarsler og forholdsregler<\/h2>\n<ul>\n<li><strong>Depression and suicidality &mdash; FDA black-box warning.<\/strong> Tetrabenazine increases the risk of depression and suicidal ideation\/behaviour in Huntington disease patients, who already have a high baseline suicide rate (~5&ndash;10%). Assess for depression before starting. Discontinue if depression worsens or suicidal thoughts emerge.<\/li>\n<li><strong>Neuroleptic malignant syndrome (NMS).<\/strong> Rare but reported. Suspect NMS if the patient develops hyperthermia, rigidity, altered consciousness and autonomic instability. Discontinue immediately.<\/li>\n<li><strong>Parkinsonism.<\/strong> Dopamine depletion can cause bradykinesia, rigidity, tremor and falls. Dose-related &mdash; reduce the dose if parkinsonian features appear.<\/li>\n<li><strong>Dysphagia.<\/strong> Tetrabenazine can worsen swallowing difficulty, which is already a concern in Huntington disease. Aspiration risk increases. Monitor and consider speech-therapy assessment.<\/li>\n<li><strong>QTc prolongation.<\/strong> At doses &gt;50 mg\/day, tetrabenazine prolongs the QT interval. ECG monitoring recommended at higher doses. Avoid combination with other QTc-prolonging drugs.<\/li>\n<li><strong>CYP2D6 poor metabolisers.<\/strong> Tetrabenazine is extensively metabolised by CYP2D6. Poor metabolisers have higher plasma levels and increased toxicity. Maximum dose in CYP2D6 PMs is 50 mg\/day (vs 100 mg\/day in EMs). CYP2D6 genotyping is recommended before exceeding 50 mg\/day.<\/li>\n<li><strong>Hepatic impairment.<\/strong> Contraindicated in patients with hepatic impairment (no dose-adjustment data available).<\/li>\n<li><strong>Driving.<\/strong> Sedation, akathisia and parkinsonism can impair driving. Avoid until stable on dose.<\/li>\n<\/ul>\n<h2 class=\"wp-block-heading\">Contraindications &mdash; Who Should NOT Take Atrest<\/h2>\n<ul>\n<li>Actively suicidal or inadequately treated depression<\/li>\n<li>Leversvigt<\/li>\n<li>Concurrent use of <strong>MAO-h\u00e6mmere<\/strong> (hypertensive crisis risk)<\/li>\n<li>Concurrent use of <strong>reserpine<\/strong> (additive dopamine\/serotonin depletion)<\/li>\n<li>Known hypersensitivity to tetrabenazine or any excipient<\/li>\n<\/ul>\n<h2 class=\"wp-block-heading\">L\u00e6gemiddelinteraktioner<\/h2>\n<ul>\n<li><strong>MAO inhibitors:<\/strong> Contraindicated \u2014 risk of hypertensive crisis. Wait \u226514 days after stopping an MAOI before starting tetrabenazine.<\/li>\n<li><strong>St\u00e6rke CYP2D6-h\u00e6mmere<\/strong> (fluoxetine, paroxetine, quinidine): Increase tetrabenazine exposure \u2014 dose reduction required.<\/li>\n<li><strong>Reserpine:<\/strong> Contraindicated \u2014 additive monoamine depletion. Wait \u226520 days between agents.<\/li>\n<li><strong>Dopaminantagonister<\/strong> (antipsychotics, metoclopramide): Additive parkinsonism and akathisia risk.<\/li>\n<li><strong>Alcohol &amp; CNS depressants:<\/strong> Enhanced sedation \u2014 avoid or use cautiously.<\/li>\n<\/ul>\n<h2 class=\"wp-block-heading\">Opbevaringsvejledning<\/h2>\n<ul>\n<li>Opbevar ved stuetemperatur, <strong>15\u201330\u00b0C<\/strong>. Beskyt mod fugt.<\/li>\n<li>Keep in original packaging until use.<\/li>\n<li>Opbevar utilg\u00e6ngeligt for b\u00f8rn.<\/li>\n<li>Brug ikke efter udl\u00f8bsdatoen.<\/li>\n<\/ul>\n<h2 class=\"wp-block-heading\">Relaterede kategorier p\u00e5 MedsBase<\/h2>\n<ul>\n<li><a href=\"https:\/\/medsbase.com\/da\/neurological-conditions-and-epilepsy\/\">Se alle neurologiske og epilepsimediciner<\/a><\/li>\n<li><a href=\"https:\/\/medsbase.com\/da\/mental-health-and-psychiatric-medications\/\">Gennemse medicin til mental sundhed og psykiatri<\/a><\/li>\n<\/ul>\n<h2 id=\"faqs\">Ofte stillede sp\u00f8rgsm\u00e5l<\/h2>\n<h3 class=\"wp-block-heading\">What is Atrest used for?<\/h3>\n<p>Atrest contains <strong>tetrabenazine 12.5 mg<\/strong> and is used to treat <strong>chorea (involuntary movements) associated with Huntington disease<\/strong>. It is the first drug specifically approved for this indication. It may also be used off-label for tardive dyskinesia and other hyperkinetic movement disorders.<\/p>\n<h3 class=\"wp-block-heading\">How long does tetrabenazine take to reduce chorea?<\/h3>\n<p>Chorea reduction is typically noticeable within <strong>1\u20132 uger<\/strong> of reaching a therapeutic dose during titration. The TETRA-HD trial showed a significant reduction in chorea scores after a mean maintenance dose of ~50 mg\/day over 12 weeks.<\/p>\n<h3 class=\"wp-block-heading\">Why does tetrabenazine require CYP2D6 genotyping?<\/h3>\n<p>Tetrabenazine is metabolised by CYP2D6 into active metabolites. <strong>Poor metabolisers<\/strong> (5&ndash;10% of Caucasians) have significantly higher drug exposure and are at greater risk of adverse effects. Genotyping is required before exceeding 50 mg\/day to set a safe dose ceiling.<\/p>\n<h3 class=\"wp-block-heading\">Can I stop Atrest suddenly?<\/h3>\n<p>Abrupt discontinuation is generally well-tolerated (chorea returns but does not rebound beyond baseline). However, if you have been on the drug for months, a gradual taper over 1&ndash;2 weeks is prudent to monitor for mood changes. If interrupted for &gt;5 days, re-titrate from 12.5 mg.<\/p>\n<h3 class=\"wp-block-heading\">What is the difference between tetrabenazine and deutetrabenazine?<\/h3>\n<p>Deutetrabenazine (Austedo) is the deuterated form \u2014 the same molecule with deuterium atoms replacing hydrogen at key positions. This slows CYP2D6 metabolism, resulting in <strong>longer half-life, lower peak levels, and twice-daily dosing<\/strong> instead of three times daily. Deutetrabenazine also carries a lower incidence of somnolence in trials.<\/p>\n<h3 class=\"wp-block-heading\">Does tetrabenazine cause parkinsonism?<\/h3>\n<p>Yes \u2014 because it depletes dopamine, it can produce dose-related <strong>parkinsonian symptoms<\/strong> (bradykinesia, rigidity, tremor). This usually resolves with dose reduction. The goal is to find the lowest dose that adequately controls chorea without producing parkinsonism.<\/p>\n<h3 class=\"wp-block-heading\">Is Atrest the same as Xenazine?<\/h3>\n<p>Both contain tetrabenazine. Xenazine is the original brand manufactured by Lundbeck. Atrest is a generic-equivalent tablet with the same active ingredient, strength (12.5 mg), and bioavailability at a lower cost.<\/p>\n<h3 class=\"wp-block-heading\">Can tetrabenazine be used for tardive dyskinesia?<\/h3>\n<p>Tetrabenazine is used <strong>off-label<\/strong> for tardive dyskinesia (TD) and has shown benefit in case series and small trials. However, <strong>valbenazine (Ingrezza)<\/strong> og <strong>deutetrabenazine (Austedo)<\/strong> are specifically FDA-approved for TD and are generally preferred.<\/p>\n<h3 class=\"wp-block-heading\">Can I drink alcohol while taking Atrest?<\/h3>\n<p>Alcohol adds to the sedation and CNS-depressant effects of tetrabenazine. It also worsens depression \u2014 a significant concern given the black-box warning. <strong>Avoid alcohol or limit intake significantly.<\/strong><\/p>\n<h3 class=\"wp-block-heading\">Hvad skal jeg g\u00f8re, hvis jeg glemmer en dosis?<\/h3>\n<p>Take the missed dose as soon as you remember, unless it is almost time for the next dose. Do not double up. If you miss doses for 5 or more consecutive days, contact your prescriber \u2014 re-titration from the starting dose may be necessary.<\/p>\n<h3 class=\"wp-block-heading\">Does Atrest interact with antidepressants?<\/h3>\n<p>SSRIs and SNRIs that strongly inhibit CYP2D6 (fluoxetine, paroxetine) will increase tetrabenazine levels \u2014 dose adjustment is required. Weaker CYP2D6 inhibitors (sertraline, citalopram, escitalopram) are safer choices if an antidepressant is needed alongside tetrabenazine.<\/p>\n<div style=\"background:#fff3f3;border-left:4px solid #d9534f;padding:16px 20px;margin:24px 0;border-radius:4px;font-size:13px;\"><strong>Medicinsk ansvarsfraskrivelse:<\/strong> Denne side er kun til informationsform\u00e5l og erstatter ikke professionel medicinsk r\u00e5dgivning. Konsult\u00e9r altid en kvalificeret sundhedsudbyder f\u00f8r du p\u00e5begynder, \u00e6ndrer eller stopper medicin. Doseringsinformation afspejler producentens m\u00e6rkning og publiceret klinisk vejledning \u2014 individuelle behov kan variere.<\/div>\n<p><!-- medsbase-related-alts-v1 --><\/p>\n<h3 class=\"wp-block-heading\">Relaterede alternativer<\/h3>\n<p>Andre produkter inden for <strong>Kroniske tilstande<\/strong> som kunder ogs\u00e5 ser:<\/p>\n<ul>\n<li><a href=\"https:\/\/medsbase.com\/da\/meftal-p\/\">Meftal-P<\/a><\/li>\n<li><a href=\"https:\/\/medsbase.com\/da\/glide\/\">Glide<\/a><\/li>\n<li><a href=\"https:\/\/medsbase.com\/da\/pioz-15\/\">Pioz 15<\/a><\/li>\n<li><a href=\"https:\/\/medsbase.com\/da\/simvotin\/\">Simvotin<\/a><\/li>\n<li><a href=\"https:\/\/medsbase.com\/da\/atenheal\/\">Atenheal<\/a><\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"<p>\u2705 Reduces involuntary movements<br \/>\n\u2705 Controls chorea symptoms<br \/>\n\u2705 Enhances motor function<br \/>\n\u2705 Forbedrer livskvalitet<br \/>\n\u2705 Minimizes muscle spasms<\/p>\n<p>Atrest contains Tetrabenazine.<\/p>","protected":false},"featured_media":60796,"comment_status":"open","ping_status":"open","template":"","meta":[],"product_brand":[],"product_cat":[3141,3223,3468],"product_tag":[4924,4925],"class_list":{"0":"post-60795","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-category-overview","7":"product_cat-chronic-conditions","8":"product_cat-neurological-conditions-and-epilepsy","9":"product_tag-atrest","10":"product_tag-tetrabenazine","12":"first","13":"instock","14":"shipping-taxable","15":"purchasable","16":"product-type-variable","17":"has-default-attributes"},"acf":[],"_links":{"self":[{"href":"https:\/\/medsbase.com\/da\/wp-json\/wp\/v2\/product\/60795","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/medsbase.com\/da\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/medsbase.com\/da\/wp-json\/wp\/v2\/types\/product"}],"replies":[{"embeddable":true,"href":"https:\/\/medsbase.com\/da\/wp-json\/wp\/v2\/comments?post=60795"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/medsbase.com\/da\/wp-json\/wp\/v2\/media\/60796"}],"wp:attachment":[{"href":"https:\/\/medsbase.com\/da\/wp-json\/wp\/v2\/media?parent=60795"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/medsbase.com\/da\/wp-json\/wp\/v2\/product_brand?post=60795"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/medsbase.com\/da\/wp-json\/wp\/v2\/product_cat?post=60795"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/medsbase.com\/da\/wp-json\/wp\/v2\/product_tag?post=60795"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}