| Drug Class | Drug | Dosing | Side Effect | 
| 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 Alpha-Blockers | – Prazosin (Minipres) 
 – Alfuzosin (Uroxatral) 
 
 
 
 – Doxazosin (Cardura) 
 
 
 
 
 
 
 
 
 
 – Tamsulosin (Flomax) 
 
 
 
 
 – Terazosin (Hytrin) 
 
 
 
 – Silodosin (Rapaflo) | -initial, 0.5-1 mg PO HS-maintenance, 0.5-2 mg PO BID 
 
 10 mg PO QDay 
 
 
 
 
 IR: Initial: 1 mg PO QDay; titrate at 1-2 wk intervals Maintenance: 1-8 mg PO QDay XR: Initial: 4 mg PO QDay with breakfast; titrate at 3-4 wk intervals Maintenance: 4-8 mg PO QDay 
 0.4 mg PO QDay; if no response after 2 to 4 weeks, may increase to 0.8 mg 
 
 
 
 Initial: 1 mg PO QDay HS Maintenance: 1-10 mg PO QDay; MAX 20 mg/day 
 
 
 8 mg PO QDay with a meal | – Orthostatic   hypotension, Palpitations- Nausea – Asthenia, Dizziness, Headache, Lethargy, Somnolence. 
 -Xerostomia – Dizziness, Vertigo – Fatigue, Malaise – Afib, Palpitations, Prolonged QT interval, Syncope 
 -Edema, Hypotension – Nausea – Dizziness, Headache, Somnolence, Vertigo – Intraoperative floppy iris syndrome – Priapism (rare) – Hepatitis – Angioedema 
 
 
 
 
 
 – Infectious disease – Backache – Asthenia, Dizziness, Headache, Insomnia, Somnolence – Abnormal ejaculation – Retinal detachment – Priapism 
 – Orthostatic hypotension, Palpitations, Peripheral edema – Nausea – Asthenia, Dizziness, Headache, Somnolence – Nasal congestion – Syncope – Intraoperative floppy iris syndrome – Priapism – Orthostatic hypotension – Diarrhea – Dizziness, Headache – Retrograde ejaculation – Nasal congestion, Nasopharyngitis | 
| 5- Alpha-reductase inhibitors (5-ARIs) | – Finasteride (Proscar) 
 
 – Dutasteride (Avodart, Jalyn) | 5 mg PO QDay;  alone or   in combi w/ doxazosin 
 Monotherapy: 0.5 mg PO QDay Combination: 0.5 mg PO and tamsulosin 0.4 mg QDay | – Abnormal ejaculation, Breast tenderness, Reduced libido– Neoplasm of male breast – Prostate cancer, high-grade 
 -Disorder of breast, abnormal PSA – Disorder of ejaculation Impotence Reduced libido – Cutaneous hypersensitivity – Immune hypersensitivity reaction – Angioedema | 
| Phosphodiesterase type 5 (PDE5) Inhibitor | Tadalafil (Cialis) | 5 mg PO QDay at the same time | – Flushing- Indigestion, Nausea – Backache, Myalgia – Headache -Nasopharyngitis, Respiratory tract infection – Angina, Chest pain, Heart failure, Myocardial infarction, Tachycardia – Stevens-Johnson syndrome – Cerebral hemorrhage, Cerebrovascular accident, Seizure – Non-arteritic ischemic optic neuropathy, Retinal artery occlusion, Thrombosis of retinal vein – Decreased hearing, Sudden onset, Sudden hearing loss | 
 
					 
												
