Alpha Blockers to Speed Ureteral

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Alpha Blockers to Speed Ureteral Cochrane for Clinicians Putting Evidence into Practice These are summaries of Alpha Blockers to Speed Ureteral therapy plus standard therapy (hydration, reviews from the Cochrane Stone Passage pain killers, nonsteroidal anti-inflammatory Library. NATHAN HITZEMAN, MD, and SARAH drugs, corticosteroids, prophylactic antibi- This series is coordinated otics) with standard therapy plus placebo. by Corey D. Fogleman, WILLIAMS, MD, Sutter Health Family MD, Assistant Medical Medicine Residency Program, Sacramento, Others compared alpha blockers with cal- Editor. California cium channel blockers such as nifedipine A collection of Cochrane for (Procardia; 30 mg) or the antimuscarinic Clinicians published in AFP Clinical Question tolterodine (Detrol; 4 mg). is available at http://www. Do alpha blockers safely speed passage of The overall stone expulsion time was aafp.org/afp/cochrane. subcentimeter ureteral stones? three days shorter with alpha blockers than CME This clinical content with standard therapy, with a mean expul- conforms to AAFP criteria Evidence-Based Answer sion time of seven rather than 10 days. for continuing medical Compared with patients receiving standard When looking at stone-free status by the education (CME). See CME Quiz Questions on therapy (e.g., fluids, analgesics), placebo, or end of the study, patients taking alpha page 160. calcium channel blockers, patients receiving blockers had much improved clearance Author disclosure: No rel- alpha blockers had about three fewer days compared with those in standard therapy evant financial affiliations. to ureteral stone expulsion and were less (30 studies with 2,378 participants; rela- likely to be hospitalized. Adverse effects of tive risk [RR] = 1.48; number needed to alpha blocker therapy are generally tolerable. treat [NNT] = 4), and also when compared (Strength of Recommendation: A, based on head-to-head with patients taking calcium consistent, good-quality patient-oriented channel blockers (four studies with 3,486 evidence.) participants; RR = 1.19; NNT = 4.8). A Chinese RCT of 3,189 patients accounted Practice Pointers for most of the latter findings; the study was The prevalence of kidney stone disease has appropriately masked and considered at low increased in recent years and affects 5% risk of bias.2 to 10% of the population.1 Alpha blockers The benefits of alpha blockers were robust, relax smooth muscle and decrease intraure- irrespective of whether the stone was smaller teral pressures. The authors of this Cochrane than 5 mm or was 5 to 10 mm in diameter. meta-analysis evaluated the role of alpha Alpha blockers greatly reduced the need to blockers as a medical therapy to speed the hospitalize (four studies with 313 partici- passage of ureteral stones. pants; RR = 0.35; NNT = 4.2) and, to a more The authors identified 32 randomized modest degree, reduced the number of pain controlled trials (RCTs) and quasi-RCTs episodes and amount of pain medication with 5,864 participants. Participants used. were symptomatic adults with radiologi- Only five studies reported adverse effects. cally confirmed ureteral stones 10 mm or In these studies, about 10% of participants smaller. Exclusion criteria included urinary (88 out of 845) experienced dizziness, pal- tract infection, hydronephrosis, or other pitations, headache, rhinitis, retrograde underlying abnormalities of the kidney or ejaculation, fatigue and weakness, cutane- ureters. ous reaction, or postural hypotension. Most Alpha blockers used included tamsulosin adverse effects were mild and did not lead to (Flomax; 0.2 or 0.4 mg), alfuzosin (Uroxa- cessation of therapy. tral; 10 mg), doxazosin (Cardura; 4 mg), and Specialty guidelines published in 2007 terazosin (Hytrin; 2 or 5 mg); most stud- recommend use of alpha blockers to help ies used tamsulosin in a dosage of 0.4 mg pass subcentimeter ureteral stones in other- once daily. The majority of studies ran two wise stable patients.3 Duration of treatment to four weeks and compared alpha-blocker is not specified by the guidelines, but this 164Downloaded American from the Family American Physician Family Physician website at www.aafp.org/afp.www.aafp.org/afp Copyright © 2015 American AcademyVolume of Family 91, Physicians. Number For3 ◆the February private, noncom 1, 2015- mercial use of one individual user of the website. All other rights reserved. Contact [email protected] for copyright questions and/or permission requests. Cochrane for Clinicians Cochrane review suggests that passage should occur Practice Pointers within one month, if not two weeks. Family physicians The Diagnostic and Statistical Manual of Mental Disorders, should consider alpha blockers as first-line therapy for 5th ed., combines “opioid abuse” and “opioid depen- patients with otherwise uncomplicated subcentimeter dence” into the new diagnosis “opioid use disorder,” cat- ureteral stones. egorized as mild, moderate, or severe based on the number 1 SOURCE: Campschroer T, Zhu Y, Duijvesz D, Grobbee DE, Lock MT. Alpha- of positive symptoms. Pharmacologic treatment options blockers as medical expulsive therapy for ureteral stones. Cochrane for opioid use disorder include methadone and buprenor- Database Syst Rev. 2014;(4):CD008509. phine. Buprenorphine is usually prescribed as a combi- The practice recommendations in this activity are available at http:// nation formulation that includes the pharmacologically summaries.cochrane.org/CD008509. inactive naloxone, except in pregnancy when it is recom- mended that buprenorphine be used alone. Both metha- REFERENCES done and buprenorphine are intended to be administered 1. Ramello A, Vitale C, Marangella M. Epidemiology of nephrolithiasis. in conjunction with psychosocial treatment, with the goal J Nephrol. 2000;13(suppl 3):S45-S50. of eliminating withdrawal symptoms and maintaining the 2. Ye Z, Yang H, Li H, et al. A multicentre, prospective, randomized trial: patient on a documented and regulated dosage. Because comparative efficacy of tamsulosin and nifedipine in medical expul- buprenorphine is a partial agonist, there is a ceiling effect sive therapy for distal ureteric stones with renal colic. BJU Int. 2011; 108(2):276-279. to the level of respiratory depression or sedation it can 3. Preminger GM, Tiselius HG, Assimos DG, et al.; EAU/AUA Nephroli- cause, reducing the risk of overdose. Buprenorphine may thiasis Guideline Panel. 2007 guideline for the management of ureteral be prescribed by primary care physicians who complete calculi. J Urol. 2007;178 (6):2418-2434. eight hours of training and receive a waiver from the Drug Enforcement Administration. Buprenorphine Maintenance vs. This analysis included 31 randomized controlled Methadone Maintenance or Placebo trials (5,430 participants) comparing buprenorphine for Opioid Use Disorder maintenance with placebo or methadone maintenance. Primary outcomes were retention in treatment and con- ELIZABETH SALISBURY-AFSHAR, MD, MPH, FAAFP tinued use of opioids as measured by self-report or uri- Heartland Health Outreach, Chicago, Illinois nalysis. Various dosing regimens were used. All dosages of buprenorphine were superior to placebo in treatment Clinical Question retention: 7 to 15 mg per day (relative risk [RR] = 1.74; Is buprenorphine maintenance treatment effective in the 95% confidence interval [CI], 1.06 to 2.87), and 16 mg management of opioid use disorder? or more per day (RR = 1.82; 95% CI, 1.15 to 2.90). Thus, given a baseline retention rate of 40% in those Evidence-Based Answer receiving placebo, the retention rate would increase to At dosages greater than 2 mg per day, buprenorphine approximately 70% in those receiving 7 to 15 mg of maintains treatment retention better than placebo. buprenorphine and to 73% in those using at least 16 mg (Strength of Recommendation: A, based on consistent, of buprenorphine daily. Only high-dosage buprenor- good-quality patient-oriented evidence.) At 16 mg or phine (at least 16 mg per day) was effective—and then, more per day, buprenorphine was found to reduce only mildly—in suppressing illicit opioid use when illicit substance use compared with placebo as moni- monitored by urinalysis (standardized mean difference tored by urinalysis. (Strength of Recommendation: B, [SMD] = –1.17; 95% CI, –1.85 to –0.49). based on inconsistent or limited-quality patient-oriented In studies comparing buprenorphine maintenance evidence.) with methadone maintenance, flexible dosing and fixed When flexible dosing (doses adjusted based on patient dosing were evaluated. In analyses of flexible dosing, symptoms) is used, the effectiveness of buprenorphine is buprenorphine was less effective than methadone in comparable to that of methadone in suppressing opioid treatment retention (RR = 0.83; 95% CI, 0.72 to 0.95), use. (Strength of Recommendation: B, based on incon- but there was no difference between groups in sup- sistent or limited-quality patient-oriented evidence.) pression of opioid use when monitored by urinalysis When fixed dosing (a set dose is given) of 7 mg or more (SMD = –0.11; 95% CI, –0.23 to 0.02). However, when is used, buprenorphine and methadone are equally fixed dosing was studied, medium (7 to 15 mg) and high effective as measured by retention in treatment and (16 mg or more) doses of buprenorphine were found to suppression of illicit opioid use. (Strength of Recom- be equivalent to medium (40 to 85 mg) and high (85 mg mendation: B, based on inconsistent or limited-quality or more) fixed doses of methadone in terms of retention patient-oriented evidence.) and
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