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Alpha Adrenergic Antagonist
Aka: Alpha Adrenergic Antagonist, Prazosin, Minipress, Terazosin, Hytrin, Doxazosin, Cardura, Tamsulosin, Flomax- Indications
- Benign Prostatic Hypertrophy
- Hypertension (not Tamsulosin)
- Mechanism: General
- See Alpha Adrenergic Receptor (Alpha-1 antagonist)
- Mechanism: Benign Prostatic Hypertrophy
- Preparations used in Benign Prostatic Hypertrophy
- Terazosin (Hytrin)
- Doxazosin (Cardura)
- Tamsulosin (Flomax)
- Prazosin (Minipress)
- Rapid relaxation of smooth muscle tone
- Relieves symptoms of urinary obstruction
- May see full effect within 2 weeks
- Does not effect size of Prostate (unlike Proscar)
- Preparations used in Benign Prostatic Hypertrophy
- Preparations
- Prazosin (Minipress)
- Dose: 1 mg PO bid-tid (Maximum 40 mg/day)
- Less expensive but not available for once daily dose
- Terazosin (Hytrin)
- Dose: 1 mg PO qhs (Maximum 20 mg/day)
- Doxazosin (Cardura)
- Dose: 1 mg PO qd (Maximum 16 mg/day)
- Phenoxybenzamine (Dibenzyline)
- Dose: 10 mg PO bid (Maximum 120 mg/day)
- Tamsulosin (Flomax)
- More expensive than other agents
- Dose 0.4 mg PO qd (maximum 0.8 mg/day)
- Highly selective alpha-1a blocker
- Does not effect Blood Pressure
- May be more effective in BPH than other agents
- Prazosin (Minipress)
- Combination Alpha-Beta Antagonist (Labetalol or Trandate)
- Oral: 100 mg PO bid (Maximum: 2400 mg/day)
- Intravenous: 20 mg IV q10 minutes (Maximum: 200 mg)
- Adverse effects (Incidence: 7 to 9%)
- Dose at bed and slowly titrate to reduce side effects
- Cardiovascular adverse effects (not Tamsulosin)
- Other adverse effects
- Precautions
- Avoid using as monotherapy for Hypertension
- Higher risk of CVA and CHF compared with other agents
- (2000) JAMA 283:1967-75
- Avoid using as monotherapy for Hypertension
- References
| Medication Costs | ||
|---|---|---|
| PRAZOSIN HCL (on 2/10/2012 at Target.com) | ||
| PRAZOSIN HCL 1 MG Capsule | #30 for $4.00 | ($0.13/unit) |
| PRAZOSIN HCL 2 MG* Capsule | #30 for $4.00 | ($0.13/unit) |
| PRAZOSIN HCL 5 MG* Capsule | #30 for $4.00 | ($0.13/unit) |
| TERAZOSIN (on 2/10/2012 at Target.com) | ||
| TERAZOSIN 1 MG Capsule | #30 for $4.00 | ($0.13/unit) |
| TERAZOSIN 2 MG Capsule | #30 for $4.00 | ($0.13/unit) |
| TERAZOSIN 5 MG Capsule | #30 for $4.00 | ($0.13/unit) |
| TERAZOSIN 10 MG Capsule | #30 for $4.00 | ($0.13/unit) |
| DOXAZOSIN (on 2/10/2012 at Target.com) | ||
| DOXAZOSIN 1 MG Tablet | #30 for $4.00 | ($0.13/unit) |
| DOXAZOSIN 2 MG Tablet | #30 for $4.00 | ($0.13/unit) |
| DOXAZOSIN 4 MG Tablet | #30 for $4.00 | ($0.13/unit) |
| DOXAZOSIN 8 MG Tablet | #30 for $4.00 | ($0.13/unit) |
| Prazosin HCl (on 2/9/2012 at DrugStore.com) | ||
| Prazosin HCl 1mg Capsules | #60 for $17.99 | ($0.30/unit) |
| Prazosin HCl 2mg Capsules | #60 for $24.99 | ($0.42/unit) |
| Prazosin HCl 5mg Capsules | #60 for $37.99 | ($0.63/unit) |
| Minipress (on 2/9/2012 at DrugStore.com) | ||
| Minipress 1mg Capsules | #60 for $55.89 | ($0.93/unit) |
| Minipress 2mg Capsules | #60 for $75.24 | ($1.25/unit) |
| Minipress 5mg Capsules | #60 for $133.29 | ($2.22/unit) |
| Terazosin HCl (on 2/9/2012 at DrugStore.com) | ||
| Terazosin HCl 1mg Capsules | #30 for $15.99 | ($0.53/unit) |
| Terazosin HCl 2mg Capsules | #30 for $13.99 | ($0.47/unit) |
| Terazosin HCl 5mg Capsules | #30 for $13.99 | ($0.47/unit) |
| Terazosin HCl 10mg Capsules | #30 for $13.99 | ($0.47/unit) |
| Doxazosin Mesylate (on 2/9/2012 at DrugStore.com) | ||
| Doxazosin Mesylate 1mg Tablets | #30 for $17.99 | ($0.60/unit) |
| Doxazosin Mesylate 2mg Tablets | #30 for $20.99 | ($0.70/unit) |
| Doxazosin Mesylate 4mg Tablets | #30 for $21.99 | ($0.73/unit) |
| Doxazosin Mesylate 8mg Tablets | #30 for $23.99 | ($0.80/unit) |
| Cardura XL (on 2/9/2012 at DrugStore.com) | ||
| Cardura XL 4mg 24 Hour Tablets | #30 for $64.04 | ($2.13/unit) |
| Cardura XL 8mg 24 Hour Tablets | #30 for $67.20 | ($2.24/unit) |
| Cardura (on 2/9/2012 at DrugStore.com) | ||
| Cardura 1mg Tablets | #30 for $55.63 | ($1.85/unit) |
| Cardura 2mg Tablets | #30 for $55.99 | ($1.87/unit) |
| Cardura 4mg Tablets | #30 for $66.49 | ($2.22/unit) |
| Cardura 8mg Tablets | #30 for $66.49 | ($2.22/unit) |
| Tamsulosin HCl (on 2/9/2012 at DrugStore.com) | ||
| Tamsulosin HCl 0.4mg Capsules | #30 for $122.99 | ($4.10/unit) |
| Flomax (on 2/9/2012 at DrugStore.com) | ||
| Flomax 0.4mg Capsules | #30 for $153.99 | ($5.13/unit) |
| FPNotebook does not benefit financially from showing this medication data or their pharmacy links. This information is provided only to help medical providers and their patients see relative costs. Insurance plans negotiate lower medication prices with suppliers. Prices shown here are out of pocket, non-negotiated rates. See Needy Meds for financial assistance information. | ||
Prazosin (C0032912) |
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|---|---|
| Definition (NCI) | A synthetic piperazine derivative and an alpha-1 adrenergic receptor inhibitor used primarily as an anti-hypertensive. Prazosin's effects are most pronounced in the large resistance vessels (i.e. arterioles) and result in a decrease in total systemic vascular resistance (SVR) without a rebound or reflex tachycardia. To a lesser extent, this agent also decreases the tone of the bladder sphincter, thereby allowing the opening of the bladder into the urethra and thus relieving the urinary conditions associated with benign prostatic hypertrophy. |
| Definition (MSH) | A selective adrenergic alpha-1 antagonist used in the treatment of HEART FAILURE; HYPERTENSION; PHEOCHROMOCYTOMA; RAYNAUD DISEASE; PROSTATIC HYPERTROPHY; and URINARY RETENTION. |
| Definition (CSP) | 1-(4-amino-6,7-dimethoxy- 2-quinazolinyl) -4-(2-furoyl) piperazine. |
| Concepts | Organic Chemical (T109) , Pharmacologic Substance (T121) |
| MSH | D011224 |
| SnomedCT | 387283005, 387433003, 76058001, 51505001, 367555002 |
| English | Furazosin, Prazosin, prazosin, Piperazine, 1-(4-amino-6,7-dimethoxy-2-quinazolinyl)-4-(2-furanylcarbonyl)-, 2-[4-(2-furoyl)piperazin-1-yl]-4-amino-6,7-dimethoxyquinazoline, 1-(4-amino-6,7-dimethoxy-2-quinazolinyl)-4-(2-furanylcarbonyl)piperazine, Prazosin [Chemical/Ingredient], Prazosin (product), Prazosin (substance), Furazosin (substance), Furazosin (product), PRAZOSIN |
| Swedish | Prazosin |
| Spanish | furazosín, furazosina, furazosín (producto), prazosina (producto), prazosín (producto), furazosina (sustancia), prazosina (sustancia), prazosina, prazosín, Furazosina, Prazosina |
| Czech | prazosin |
| Finnish | Pratsosiini |
| Russian | PRAZOZIN, ADVERZUTEN, FURAZOZIN, PRATSIOL, АДВЕРЗУТЕН, ПРАЗОЗИН, ПРАТСИОЛ, ФУРАЗОЗИН |
| Japanese | プラゾシン, 塩酸プラゾシン, フラゾシン |
| Italian | Furazosina, Prazosina |
| Polish | Prazosyna |
| French | Prazosine |
| German | Furazosin, Prazosin |
| Portuguese | Furazosin, Prazosina |
| Sources |
Derived from the NIH UMLS (Unified Medical Language System) |
Terazosin (C0076107) |
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|---|---|
| Definition (NCI) | A drug used to treat urinary problems caused by an enlarged prostate. It is also used to treat high blood pressure and is being studied in the treatment of other conditions. Terazosin relaxes muscle tissue in blood vessels and in the prostate. It is a type of alpha blocker. |
| Concepts | Organic Chemical (T109) , Pharmacologic Substance (T121) |
| MSH | C041226 |
| SnomedCT | 349914007, 129484001, 387068008 |
| English | terazosin, Terazosin, Terazosin [Chemical/Ingredient], terazosine, Terazosin (product), Terazosin (substance), TERAZOSIN |
| Spanish | Terazosin, terazosina (producto), terazosina (sustancia), terazosina |
| Sources |
Derived from the NIH UMLS (Unified Medical Language System) |
Doxazosin (C0114873) |
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|---|---|
| Definition (MSH) | A prazosin-related compound that is a selective alpha-1-adrenergic blocker. |
| Definition (NCI) | A drug used to treat high blood pressure and urinary problems caused by an enlarged prostate. It relaxes muscle tissue in blood vessels and in the prostate. Cardura is a type of alpha blocker. |
| Definition (NCI) | A quinazoline with antihypertensive and antineoplastic properties. Doxazosin is an alpha-adrenergic antagonist that selectively inhibits alpha-1 adrenergic receptors. Blockages of the alpha-1 adrenergic action on the vascular smooth muscles lead to a decrease in vascular resistance and antihypertensive activity. This agent also shows high affinity to alpha-1c adrenoceptor, the predominant functional type in the prostate, which may partially attribute to its effect in treatment of benign prostatic hyperplasia. Furthermore, doxazosin induces apoptosis in prostate cancer cells mediated through inhibition of protein kinase B (PKB)/Akt-signaling death receptor regulatory pathway. |
| Concepts | Organic Chemical (T109) , Pharmacologic Substance (T121) |
| MSH | D017292 |
| SnomedCT | 108556006, 372508002 |
| English | Doxazosin, Piperazine, 1-(4-amino-6,7-dimethoxy-2-quinazolinyl)-4-((2,3-dihydro-1,4-benzodioxin-2-yl)carbonyl)-, doxazosin, Doxazosin [Chemical/Ingredient], Doxazosin (product), Doxazosin (substance), DOXAZOSIN |
| Swedish | Doxazosin |
| Czech | doxazosin |
| Finnish | Doksatsosiini |
| Russian | DOKSAZOZIN, ДОКСАЗОЗИН |
| Japanese | ドキサゾシン, ドキサゾシンメシレート, メシル酸ドキサゾシン |
| Spanish | Doxazosin, Doxazosina, doxazosina (producto), doxazosina (sustancia), doxazosina |
| Portuguese | Doxazosina, Doxazossina, Doxazosin |
| Polish | Doksazosyna, Metylosulfonian doksazosyny |
| French | Doxazosine |
| German | Doxazosin |
| Italian | Dossazosina |
| Sources |
Derived from the NIH UMLS (Unified Medical Language System) |
Minipress (C0242447) |
|
|---|---|
| Concepts | Organic Chemical (T109) , Pharmacologic Substance (T121) |
| MSH | D011224 |
| English | Pfizer Brand of Prazosin Hydrochloride, minipress, Minipress |
| Sources |
Derived from the NIH UMLS (Unified Medical Language System) |
tamsulosin (C0257343) |
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|---|---|
| Definition (NCI) | A drug used to treat urinary problems caused by an enlarged prostate. Tamsulosin relaxes the muscles of the prostate and bladder, which helps the flow of urine. It is a type of alpha blocker. |
| Concepts | Organic Chemical (T109) , Pharmacologic Substance (T121) |
| MSH | C088482 |
| SnomedCT | 108559004, 372509005 |
| English | 5-(2-((2-(2-ethoxyphenoxy)ethyl)amino)propyl)-2-methoxybenzenesulfonamide, tamsulosin, 5-((2R)-2-(2-(2-ethoxyphenoxy)ethylamino)propyl)-2-methoxy-benzenesulfonamide, TAMSULOSIN, tamsulosin [Chemical/Ingredient], Tamsulosin, Tamsulosin (product), Tamsulosin (substance) |
| Spanish | tamsulosina (producto), tamsulosina (sustancia), tamsulosina |
| Sources |
Derived from the NIH UMLS (Unified Medical Language System) |
Hytrin (C0591628) |
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|---|---|
| Concepts | Organic Chemical (T109) , Pharmacologic Substance (T121) |
| MSH | C041226 |
| English | Hytrin BPH, Abbott Brand of Terazosin Hydrochloride, hytrin, hytrin bph, Hytrin, Deflox, Flotrin, Heitrin, Hytrine |
| Sources |
Derived from the NIH UMLS (Unified Medical Language System) |
Flomax (C0662903) |
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|---|---|
| Concepts | Organic Chemical (T109) , Pharmacologic Substance (T121) |
| MSH | C088482 |
| English | Flomax, Abbott laboratories brand of tamsulosin hydrochloride, flomax |
| Sources |
Derived from the NIH UMLS (Unified Medical Language System) |
Cardura (C0678136) |
|
|---|---|
| Definition (MSH) | Trade name in United States. |
| Concepts | Organic Chemical (T109) , Pharmacologic Substance (T121) |
| MSH | D017292 |
| English | Carduran, cardura, carduran, Cardura, Cardular, Pfizer Brand of Doxazosin Mesylate, Zoxan |
| Sources |
Derived from the NIH UMLS (Unified Medical Language System) |