{"id":11974,"date":"2025-05-14T09:26:42","date_gmt":"2025-05-14T13:26:42","guid":{"rendered":"https:\/\/www.rigicon.com\/glossary-term\/alpha-blockers\/"},"modified":"2025-05-14T09:26:42","modified_gmt":"2025-05-14T13:26:42","slug":"bloqueadores-alfa","status":"publish","type":"glossary-term","link":"https:\/\/www.rigicon.com\/es\/glossary-term\/bloqueadores-alfa\/","title":{"rendered":"Bloqueadores Alfa"},"content":{"rendered":"","protected":false},"excerpt":{"rendered":"","protected":false},"featured_media":0,"template":"","glossary-category":[114],"glossary-product":[104,105],"class_list":["post-11974","glossary-term","type-glossary-term","status-publish","hentry","glossary-category-urological-agents","glossary-product-infla10-pulse-ipp-series","glossary-product-rigi10-malleable-penile-prosthesis"],"acf":{"gt-definition":"<p>Los alfabloqueantes, tambi\u00e9n conocidos como antagonistas alfa-adren\u00e9rgicos, son una clase de f\u00e1rmacos que act\u00faan bloqueando los receptores alfa-adren\u00e9rgicos (receptores alfa) en el sistema nervioso simp\u00e1tico. Esta acci\u00f3n evita que catecolaminas como la noradrenalina y la epinefrina se unan a estos receptores, lo que produce diversos efectos fisiol\u00f3gicos. Su objetivo principal es relajar ciertos m\u00fasculos y ayudar a que los peque\u00f1os vasos sangu\u00edneos permanezcan abiertos. Al bloquear la acci\u00f3n de los nervios del sistema nervioso simp\u00e1tico, pueden mejorar el flujo sangu\u00edneo y reducir la presi\u00f3n arterial. Tambi\u00e9n se utilizan para relajar el tono muscular de la pr\u00f3stata y el cuello de la vejiga, mejorando as\u00ed el flujo urinario en afecciones como la hiperplasia prost\u00e1tica benigna (BPH). Los alfabloqueantes se clasifican ampliamente en alfabloqueantes no selectivos (que bloquean los receptores alfa-1 y alfa-2) y alfabloqueantes selectivos (que se dirigen principalmente a los receptores alfa-1 o alfa-2). Los bloqueadores alfa-1 selectivos se usan com\u00fanmente para la hipertensi\u00f3n y la HPB, mientras que los bloqueadores alfa no selectivos tienen usos m\u00e1s especializados, como en el tratamiento del feocromocitoma. El mecanismo espec\u00edfico implica la modulaci\u00f3n del tono vascular y la liberaci\u00f3n de norepinefrina, lo que produce vasodilataci\u00f3n y relajaci\u00f3n del m\u00fasculo liso seg\u00fan el subtipo y la ubicaci\u00f3n del receptor.\u207d\u00b9\u207e\u207d\u00b9\u2075\u207e<\/p>","gt-synonyms":"Antagonistas alfa-adren\u00e9rgicos, Antagonistas de los receptores alfa adren\u00e9rgicos, bloqueadores \u03b1, Agentes bloqueadores alfa-adren\u00e9rgicos","gt-citation":"[1] Pacak K. Preoperative management of the pheochromocytoma patient. J Clin Endocrinol Metab. 2007 Nov;92(11):4069-79. doi: 10.1210\/jc.2007-1720. Epub 2007 Sep 11. PMID: 17848402.\n\n[2] Ramachandran R, Rewari V. Perioperative management of pheochromocytoma. Indian J Urol. 2017 Jan-Mar;33(1):19-25. doi: 10.4103\/0970-1591.195716. PMID: 28197011; PMCID: PMC5264186.\n\n[3] Richards JR, Hollander JE, Ramoska EA, Fareed FN, Sand IC, Wipfler MG, Lange RA. \u03b2-Blockers, Cocaine, and the Unopposed \u03b1-Stimulation Phenomenon. J Cardiovasc Pharmacol Ther. 2017 May;22(3):239-249. doi: 10.1177\/1074248416680577. Epub 2016 Nov 29. PMID: 27899671.\n\n[4] Page RL, O'Bryant CL, Cheng D, Dow TJ, Ky B, Stein CM, Spencer AP, Trupp RJ, Lindenfeld J., American Heart Association Clinical Pharmacology and Heart Failure and Transplantation Committees of the Council on Clinical Cardiology; Council on Cardiovascular Surgery and Anesthesia; Council on Cardiovascular and Stroke Nursing; and Council on Quality of Care and Outcomes Research. Drugs That May Cause or Exacerbate Heart Failure: A Scientific Statement From the American Heart Association. Circulation. 2016 Aug 9;134(6):e32-69. doi: 10.1161\/CIR.0000000000000426. Erratum in: Circulation. 2016 Sep 20;134(12):e261. Erratum in: Circulation. 2017 Jan 31;135(5):e20. PMID: 27400984.\n\n[5] Thadchanamoorthy V, Dayaratna T. Phentolamine. StatPearls Publishing; 2024 Jan. Disponible en: https:\/\/www.ncbi.nlm.nih.gov\/books\/NBK564363\/\n\n[6] McMahon CG. Current diagnosis and management of erectile dysfunction. Med J Aust. 2019 Sep;211(6) :280-285. doi: 10.5694\/mja2.50329. Epub 2019 Aug 18. PMID: 31422605.\n\n[7] Coombs PG, Heck M, Guhring P, Narus J, Mulhall JP. A review of outcomes of an intracavernosal injection therapy programme. BJU Int. 2012 May;109(9):1397-401. doi: 10.1111\/j.1464-410X.2011.10530.x. Epub 2011 Sep 26. PMID: 21951404.\n\n[8] Duncan C, Omran M, Teh J, Davis N, Kuan M, DCRC study group. Erectile dysfunction: a global review of intracavernosal injectables. World J Urol. 2019 Jun;37(6):1007-1014. doi: 10.1007\/s00345-019-02704-7. Epub 2019 Mar 11. PMID: 30859279.\n\n[9] Chobanian AV, Bakris GL, Black HR, Cushman WC, Green LA, Izzo JL, Jones DW, Materson BJ, Oparil S, Wright JT, Roccella EJ., National Heart, Lung, and Blood Institute Joint National Committee on Prevention, Detection, Evaluation, and Treatment of High Blood Pressure. National High Blood Pressure Education Program Coordinating Committee. The Seventh Report of the Joint National Committee on Prevention, Detection, Evaluation, and Treatment of High Blood Pressure: the JNC 7 report. JAMA. 2003 May 21;289(19):2560-72. doi: 10.1001\/jama.289.19.2560. Erratum in: JAMA. 2003 Jul 9;290(2):197. PMID: 12748199.\n\n[10] AUA Guideline on Management of Benign Prostatic Hyperplasia (BPH). American Urological Association. Actualizado 2023. Disponible en: https:\/\/www.auanet.org\/guidelines-and-quality\/guidelines\/benign-prostatic-hyperplasia-(bph -guideline\n\n[11] Ernst E, Pittler MH. Yohimbine for erectile dysfunction: a systematic review and meta-analysis of randomized clinical trials. J Urol. 1998 Feb;159(2):433-6. doi: 10.1016\/s0022-5347(01)63942-x. PMID: 9649257.\n\n[12] Tam SW, Worcel M, Wyllie M. Yohimbine: a clinical review. Pharmacol Ther. 2001 Sep;91(3):215-43. doi: 10.1016\/s0163-7258(01)00156-5. PMID: 11744068.\n\n[13] Ostojic SM. Yohimbine: the effects on body composition and exercise performance in soccer players. Res Sports Med. 2006 Oct-Dec;14(4):289-99. doi: 10.1080\/15438620600987106. PMID: 17214405.\n\n[14] Morales A. Yohimbine in erectile dysfunction: the facts. Int J Impot Res. 2000 Mar;12 Suppl 1:S70-4. doi: 10.1038\/sj.ijir.3900501. PMID: 10743698.\n\n[15] Katzung BG, Masters SB, Trevor AJ. Basic & Clinical Pharmacology. 12th ed. McGraw-Hill Medical; 2012.\n\n[16] Hoffman BB. Adrenoceptor-Blocking Drugs. In: Brunton LL, Chabner BA, Knollmann BC, editors. Goodman & Gilman's: The Pharmacological Basis of Therapeutics. 12th ed. New York, NY: McGraw-Hill; 2011. p. 279-302.\n\n[17] Lepor H. Alpha-blockers for the treatment of benign prostatic hyperplasia. Rev Urol. 2007 Fall;9(4):181-90. PMID: 18231614; PMCID: PMC2213889.\n\n[18] Rovner ES, Guralnick ML, Issa MM, Bresette JF, Foote JE, Karram MM, Nitti VW, Raz S, Sussman DO, Walter K, Zinner NR., Tamsulosin LUTS Study Group. Tamsulosin for the treatment of lower urinary tract symptoms in women: a randomized, double-blind, placebo-controlled trial. J Urol. 2005 Mar;173(3):843-7. doi: 10.1097\/01.ju.0000152971.02985.7b. PMID: 15711050.\n\n[19] Seitz C, Liatsikos E, Porpiglia F, Tiselius HG, Zwergel U. Medical therapy to facilitate the passage of stones: what is the evidence? Eur Urol. 2009 Sep;56(3):455-71. doi: 10.1016\/j.eururo.2009.06.012. Epub 2009 Jun 17. PMID: 19556043.\n\n[20] Hollingsworth JM, Canales BK, Rogers MA, Sukumar S, Yan P, Kuntz GM, Dahm P, Hollenbeck BK. Alpha blockers for treatment of ureteric stones: systematic review and meta-analysis. BMJ. 2016 Oct 26;355:i5424. doi: 10.1136\/bmj.i5424. PMID: 27784695; PMCID: PMC5082933.\n\n[21] Campschroer T, Zhu Y, Duijvesz D, Grobbee DE, Lock MT. Alpha-blockers as medical expulsive therapy for ureteral stones. Cochrane Database Syst Rev. 2018 Apr 11;4(4):CD008509. doi: 10.1002\/14651858.CD008509.pub3. PMID: 29637541; PMCID: PMC6494465.\n\n[22] Pickard R, Starr K, MacLennan G, Lam T, Thomas R, Burr J, Norrie J, McPherson G, McDonald A, Anson K, N'Dow J, Burgess N, Clark T, Kilonzo M, Gillies K, Boachie C, Erasmus P, McClinton S, Goodman C., SUSPEND Study Group. Medical expulsive therapy in adults with ureteric colic: a multicentre, randomised, placebo-controlled trial. Lancet. 2015 Jul 25;386(9991):341-9. doi: 10.1016\/S0140-6736(15)60933-3. Epub 2015 May 19. PMID: 26003623.\n\n[23] Ye Z, Zeng G, Yang H, Tang K, Zhang X, Li H, Li W, Wu S, Chen L, Chen X, Liu X, Deng Y, Pan T, Xing C, Wang S, Cheng Y, Gao X. Efficacy and Safety of Silodosin in the Medical Expulsive Therapy for Distal Ureteral Stones: A Systematic Review and Meta-Analysis. Urol Int. 2018;100(1):17-29. doi: 10.1159\/000480310. Epub 2017 Oct 18. PMID: 29041010.\n\n[24] Sharma G, Laddha A, Athyal UR, Singh V. Silodosin versus tamsulosin for medical expulsion therapy of ureteral stones: A systematic review and meta-analysis. Arab J Urol. 2019 Mar 21;17(2):130-139. doi: 10.1080\/2090598X.2019.1586232. PMID: 31285889; PMCID: PMC6584089.\n\n[25] Cui Y, Chen J, Yang S, Zong H, Zhang Y. Silodosin versus tamsulosin for the management of lower ureteral stones: a meta-analysis. Urolithiasis. 2015 Feb;43(1):61-7. doi: 10.1007\/s00240-014-0727-0. Epub 2014 Nov 20. PMID: 25410298.\n\n[26] Corona G, Rastrelli G, Burri A, Jannini EA, Maggi M. The safety and efficacy of alpha-blockers for the treatment of premature ejaculation: a systematic review and meta-analysis. Expert Opin Drug Saf. 2017 Mar;16(3):301-309. doi: 10.1080\/14740338.2017.1283399. Epub 2017 Jan 25. PMID: 28097895.\n\n[27] Nickel JC, M\u00e9ndez-Probst CE, Whelan TF, Paterson RF, Razvi H. 2010 Update: Guidelines for the management of benign prostatic hyperplasia. Can Urol Assoc J. 2010 Oct;4(5):310-6. doi: 10.5489\/cuaj.10124. PMID: 20941312; PMCID: PMC2950766.\n","gt-clinical-context":"<p>Los alfabloqueantes se utilizan en diversos escenarios cl\u00ednicos, principalmente para el tratamiento de la hiperplasia prost\u00e1tica benigna (BPH) y \u200b\u200bla hipertensi\u00f3n.\u207d\u2079\u207e\u207d\u00b9\u2070\u207e\u207d\u00b9\u2077\u207e En la HPB, los alfabloqueantes selectivos como tamsulosina, alfuzosina y silodosina se consideran agentes de primera l\u00ednea. Act\u00faan relajando el m\u00fasculo liso de la pr\u00f3stata y el cuello de la vejiga, lo que alivia los s\u00edntomas del tracto urinario inferior (LUTS) como dificultad para orinar, flujo d\u00e9bil y nicturia. El alivio sintom\u00e1tico a menudo se observa a los pocos d\u00edas de iniciar la terapia.\u207d\u00b9\u2070\u207e La selecci\u00f3n de pacientes para la HPB generalmente involucra a hombres con STUI de moderados a graves que no tienen contraindicaciones para la terapia con alfabloqueantes. Los resultados esperados incluyen una mejora en la tasa de flujo urinario y una reducci\u00f3n en las puntuaciones de los s\u00edntomas.<\/p>\n<p>Para la hipertensi\u00f3n, los alfabloqueantes como la doxazosina y la prazosina generalmente se consideran agentes de segunda l\u00ednea debido a posibles efectos adversos como la hipotensi\u00f3n ortost\u00e1tica.\u207d\u2079\u207e Se usan cuando otros antihipertensivos son insuficientes o est\u00e1n contraindicados. Estos medicamentos reducen la presi\u00f3n arterial al provocar vasodilataci\u00f3n de los vasos sangu\u00edneos perif\u00e9ricos. La selecci\u00f3n de pacientes implica una cuidadosa consideraci\u00f3n de los factores de riesgo cardiovascular y la posibilidad de s\u00edntomas ortost\u00e1ticos. Los resultados esperados son una reducci\u00f3n de la presi\u00f3n arterial sist\u00e9mica.<\/p>\n<p>Los alfabloqueantes no selectivos, la fenoxibenzamina y la fentolamina, est\u00e1n aprobados por la FDA para el tratamiento del feocromocitoma, un tumor poco com\u00fan de la m\u00e9dula suprarrenal que secreta un exceso de catecolaminas. Se usan antes y durante la operaci\u00f3n para controlar las crisis hipertensivas.\u207d\u00b9\u207e\u207d\u00b2\u207e La fentolamina tambi\u00e9n tiene usos no autorizados, incluido el tratamiento de complicaciones cardiovasculares inducidas por la coca\u00edna y como componente de la terapia de inyecci\u00f3n intracavernosa (Trimix) para la erecci\u00f3n masculina. disfunci\u00f3n.\u207d\u00b3\u207e\u207d\u2074\u207e\u207d\u2075\u207e\u207d\u2076\u207e\u207d\u2077\u207e\u207d\u2078\u207e<\/p>\n<p>Los alfabloqueantes, particularmente los antagonistas alfa-1 selectivos como la silodosina y la tamsulosina, tambi\u00e9n se emplean como terapia m\u00e9dica expulsiva de primera l\u00ednea (MET) para los c\u00e1lculos ureterales (c\u00e1lculos renales), especialmente aquellos ubicados en el ur\u00e9ter distal. Relajan el m\u00fasculo liso ureteral, facilitando el paso espont\u00e1neo de los c\u00e1lculos.\u207d\u00b9\u2079\u207e\u207d\u00b2\u2070\u207e\u207d\u00b2\u00b9\u207e\u207d\u00b2\u00b2\u207e\u207d\u00b2\u00b3\u207e\u207d\u00b2\u2074\u207e\u207d\u00b2\u2075\u207e La terapia es Por lo general, contin\u00faa durante hasta tres semanas. Los alfabloqueantes tambi\u00e9n han demostrado cierta eficacia en el tratamiento de la eyaculaci\u00f3n precoz, aunque pueden afectar el volumen del semen.\u207d\u00b2\u2076\u207e Adem\u00e1s, se puede considerar la terapia con alfabloqueantes para pacientes femeninas que experimentan retenci\u00f3n urinaria u otros STUI.\u207d\u00b9\u2078\u207e<\/p>\n<p>Los procedimientos quir\u00fargicos no est\u00e1n directamente asociados con la administraci\u00f3n de alfabloqueantes en s\u00ed, pero estos medicamentos a menudo son parte de la estrategia de tratamiento m\u00e9dico para afecciones que eventualmente podr\u00edan requerir cirug\u00eda (p. ej., la HPB que progresa hasta requerir resecci\u00f3n transuretral de la pr\u00f3stata si el tratamiento m\u00e9dico falla o es insuficiente). En el contexto del feocromocitoma, el alfabloqueo es una parte fundamental de la preparaci\u00f3n perioperatoria para la extirpaci\u00f3n quir\u00fargica del tumor.\u207d\u00b9\u207e\u207d\u00b2\u207e<\/p>","gt-related-evidence":null,"gt-featured":false,"gt-ai-referenced":false,"gt-view-count":112},"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v27.7 (Yoast SEO v27.7) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Bloqueadores Alfa<\/title>\n<meta name=\"description\" content=\"Bloqueadores alfa: conozca estos medicamentos utilizados para la presi\u00f3n arterial alta (HTN) y \u200b\u200bBPH, su mecanismo y aplicaciones cl\u00ednicas.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.rigicon.com\/es\/glossary-term\/bloqueadores-alfa\/\" \/>\n<meta property=\"og:locale\" content=\"es_ES\" \/>\n<meta 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