Tamsulosin
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Pronunciation | /tæmˈsuːləsɪn/[1] tam-SOO-lə-sin |
Trade names | Flomax, others |
AHFS/Drugs.com | Monograph |
MedlinePlus | a698012 |
License data |
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Routes of administration | By mouth |
ATC code | |
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Pharmacokinetic data | |
Bioavailability | 100% (by mouth) |
Metabolism | Liver |
Elimination half-life | 9–13 hours |
Excretion | 76% Kidney |
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Tamsulosin, sold under the brand name Flomax among others, is a
Common side effects include dizziness, headache, sleeplessness, nausea,
Tamsulosin was approved for medical use in the United States in 1997.
Medical uses
Tamsulosin is primarily used for
Tamsulosin is also used as an add-on treatment for
Tamsulosin does not decrease the overall size of the prostate in men with BPH, and is not recommended for prevention of prostate cancer.[16]
Combination therapy
The results of the CombAT (combination of dutasteride (Avodart) and tamsulosin, under the brand name Duodart) trial in 2008 demonstrated that treatment with the combination of dutasteride and tamsulosin provides greater symptom benefits compared to monotherapy with either agent alone for treatment of benign prostatic hyperplasia.[17] The CombAT trial became the medication Jalyn. It was approved by the FDA on 14 June 2010.[18] This combination can be useful because it may take up to six months for symptomatic relief to be found when using 5-alpha-reductase inhibitors such as dutasteride compared to alpha-1 receptor blockers, which can provide relief in some cases within 48 hours.[19]
Adverse effects
- Eyes: People taking tamsulosin are prone to a Adverse outcomes of the surgery are greatly reduced by the surgeon's prior knowledge of the person's history with this drug, and thus having the option of alternative techniques.[20]
- Severe hypotension.[21][22]
- Persons with cardiac conditions including hypotension, mechanical heart failure (valvular, pulmonary embolism, pericarditis), and congestive heart failure should be monitored carefully while taking tamsulosin.
- Alpha blockers, including prazosin, terazosin, doxazosin, or tamsulosin, do not appear to affect all-cause mortality in heart failure rehospitalization in those also receiving β-blockers.[23]
- Tamsulosin can also cause retrograde ejaculation, which occurs when semen is redirected to the urinary bladder instead of being ejaculated normally. This is because tamsulosin relaxes the muscles of the urethral sphincters, which are normally closed during ejaculation.[24]
Mechanism
Tamsulosin is a selective
When alpha 1 receptors in the bladder neck, prostate, ureter, and urethra are blocked, a relaxation in smooth muscle tissue results.[16] This mechanism decreases resistance to urinary flow, reduces discomfort associated with BPH, and facilitates passage of kidney stones.[16]
Brand names
Tamsulosin was first marketed in 1996 under the
It is marketed by various companies under licence, including Boehringer Ingelheim and CSL. Tamsulosin hydrochloride extended-release capsules are marketed under the trade names Urimax 0.4 (India),Tamlocept 0.4 (India), Flomax, Flomaxtra, Contiflo XL, bestflo, Mecir LP (France), Urimax, Pamsvax, and Pradif,[29] although generic, unmodified-release capsules are still approved and marketed in many countries (such as Canada). Generic extended-release tablets are marketed in most countries of the EEA.[30] In Mexico, it is marketed as Secotex and as Harnal D in Japan and Indonesia and as Harnal OCAS (oral controlled absorption system) in Thailand.[31] In Egypt,[32] Italy, Russia and Iceland, it is marketed under the trade name Omnic by Astellas Pharma Europe. The largest manufacturer of tamsulosin is Synthon BV (the Netherlands).[citation needed] Tamsulosin hydrochloride is marketed in Bangladesh under the trade names Uromax, Prostanil MR, Tamisol MR, and Tamsin.[citation needed]
References
- ^ "Tamsulosin". Merriam-Webster.com Dictionary.
- ^ "Product monograph brand safety updates". Health Canada. February 2024. Retrieved 24 March 2024.
- ^ "Flomaxtra XL, 400 micrograms, film-coated prolonged release tablet – Summary of Product Characteristics (SmPC)". (emc). 12 November 2019. Retrieved 2 December 2021.
- ^ "Faramsil 400 microgram Prolonged-release Tablets – Summary of Product Characteristics (SmPC)". (emc). 4 November 2020. Retrieved 2 December 2021.
- ^ "Flomax– tamsulosin hydrochloride capsule". DailyMed. Retrieved 2 December 2021.
- ^ a b c d e "Tamsulosin Hydrochloride Monograph for Professionals". Drugs.com. AHFS. Retrieved 24 December 2018.
- ^ "Prostatitis". NHS. 19 October 2017. Retrieved 24 December 2018.
- ^ PMID 27616037.
- ^ ISBN 9780857113382.
- ISBN 9781585283057.
- ^ "The Top 300 of 2021". ClinCalc. Archived from the original on 15 January 2024. Retrieved 14 January 2024.
- ^ "Tamsulosin –Drug Usage Statistics". ClinCalc. Retrieved 14 January 2024.
- ^ "Tamsulosin Aids Stone Expulsion". Renal and Urology News. 7 January 2011.
- ^ "Study Shows Use of Tamsulosin or Nifedipine Helps Patients to Clear Ureteral Stone Fragments Faster and Reduces Rate of Recurrence".
- S2CID 30254915.
- ^ )
- PMID 18082216.
- ^ FDA approval letter at FDA.gov
- ^ Australian Medicines Handbook [full citation needed]
- ^ Medscape, Good Cataract Surgery Outcomes Possible in Intraoperative Floppy Iris Syndrome Due to Tamsulosin.
- PMID 24192967.
- S2CID 24324483.
- PMID 27400984.
- ^ "Tamsulosin Side Effects". Drugs.com. Retrieved 27 April 2011.
- ISBN 978-1-59541-101-3.
- ^ "Flomax – Big Patent Expirations of 2010". 10 February 2010. Archived from the original on 22 April 2012. Retrieved 14 January 2012.
- U.S. Food and Drug Administration(FDA). 2 March 2010.
- S2CID 32141889.
- ^ Magnanelli S, Vetere AM. "Pradif 0,4 Mg Capsule Rigide A Rilascio Prolungato". Torrinomedica.it. Retrieved 15 November 2012.
- ^ "Tamsulosina Mylan 0,4 mg cápsulas duras de liberación modificada EFG" (PDF). cima.aemps.es. Retrieved 29 October 2018.
- ^ "Drugs.com Database".
- ^ "Novartis hits Astellas with transplant drug generic". Reuters. 11 August 2009. Retrieved 11 August 2009.