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Medications for Use Disorder BRADFORD T. WINSLOW, MD, and MARY ONYSKO, PharmD, BCPS, Swedish Family Medicine Residency Program, Littleton, Colorado MELANIE HEBERT, MD, Kaiser Permanente, Highlands Ranch, Colorado

The U.S. Preventive Services Task Force recommends that clinicians screen adults for alcohol misuse and provide persons engaged in risky or hazardous drinking behaviors with brief behavioral counseling to reduce alcohol misuse. However, only a minority of American adults with high-risk alcohol use receive treatment. Three medications are approved by the U.S. Food and Drug Administration to treat alcohol use disorder: acamprosate, disulfiram, and naltrexone. Acamprosate and naltrexone reduce alcohol consumption and increase abstinence rates, although the effects appear to be modest. Disulfiram has been used for years, but evidence supporting its effectiveness is inconsis- tent. Other medications may be beneficial to reduce heavy alcohol use. The anticonvulsants topiramate and gabapentin may reduce alcohol ingestion, although long-term studies are lacking. Antide- pressants do not decrease alcohol use in patients without mood dis- orders, but and may help depressed patients decrease alcohol ingestion. Ondansetron may reduce alcohol use, particularly in selected subpopulations. Further study is needed for genetically targeted or as-needed medications to reduce alcohol use. (Am Fam Physician. 2016;93(6):457-465. Copyright © 2016 American

Academy of Family Physicians.) ILLUSTRATION JONATHAN BY DIMES

CME This clinical content xcessive alcohol use is the third varies in ambulatory settings, and it is not conforms to AAFP criteria leading cause of preventable death recommended by the USPSTF. Individuals for continuing medical in the United States.1 The Diag- who engage in high-risk drinking should education (CME). See CME Quiz Questions on nostic and Statistical Manual of be counseled to decrease their alcohol use, page 449. EMental Disorders, 5th ed., integrates the pre- and patients diagnosed with AUD should Author disclosure: No rel- vious categories of alcohol abuse and alcohol be offered treatment, such as brief behav- evant financial affiliations. dependence into the diagnosis of alcohol use ioral interventions, support programs such ▲ Patient information: disorder (AUD); Table 1 shows the complete as Alcoholics Anonymous, individual and A handout on this topic, criteria.2 The National Institutes of Health group therapy, and medications. A study of written by the authors of estimates that AUD affected 9% of adult men more than 43,000 American adults found this article, is available at http://www.aafp.org/ and 5% of adult women in the United States that only 24% of those with AUD received 6 afp/2016/0315/p457-s1. in 2013, and many more adults and adoles- treatment. Possible reasons for low treat- html. cents engaged in high-risk alcohol use.3 ment rates include the social stigma of AUD, a lack of understanding of AUD as a treatable Guidelines condition, and a lack of clinician familiarity The U.S. Preventive Services Task Force with pharmacotherapy and other treatment (USPSTF) recommends screening adults options for the disorder. Patients with AUD for alcohol misuse and providing persons are at risk of alcohol withdrawal and may engaged in risky or hazardous drinking require medical management for withdrawal behaviors with brief behavioral counsel- before initiating treatment.7 ing to reduce alcohol misuse.4 Table 2 lists A Substance Abuse and Mental Health Ser- USPSTF-recommended screening methods vices Administration/National Institute on that have been validated in primary care Alcohol Abuse and Consensus settings.4,5 Although the CAGE question- Panel recommends pharmacotherapy along naire is familiar to clinicians, its accuracy with behavioral interventions for AUD.8

MarchDownloaded 15, 2016 from ◆the Volume American 93, Family Number Physician 6 website at www.aafp.org/afp.www.aafp.org/afp Copyright © 2016 American Academy of FamilyAmerican Physicians. Family For the Physician private, noncom 457- mercial use of one individual user of the website. All other rights reserved. Contact [email protected] for copyright questions and/or permission requests. Alcohol Use Disorder

However, less than 10% of patients with AUD complications of alcohol abuse (e.g., mor- are treated with medications.9 It is difficult tality, cirrhosis, alcohol-related arrests, job to assess the benefit of medications because loss). Most studies of medications for AUD most studies assess outcomes such as alco- also include counseling, so it is difficult to holic drinks per day and drinking days over assess medication effects without counseling. a period of time, rather than abstinence and The Department of Veterans Affairs rec- ommends the consideration of naltrexone (Revia, Vivitrol) and/or acamprosate (Cam- pral) for AUD treatment, along with coun- Table 1. Criteria for the Diagnosis of Alcohol Use Disorder seling.10 The United Kingdom’s National Institute for Health and Care Excellence rec- A. A problematic pattern of alcohol use leading to clinically significant impairment or distress, as manifested by at least two of the following, ommends the consideration of acamprosate occurring within a 12-month period: or naltrexone to treat AUD, with disulfiram 1. Alcohol is often taken in larger amounts or over a longer period than (Antabuse) as a second-line medication.11 was intended. The Substance Abuse and Mental Health 2. There is a persistent desire or unsuccessful efforts to cut down or control Services Administration/National Institute alcohol use. on Alcohol Abuse and Alcoholism Con- 3. A great deal of time is spent in activities necessary to obtain alcohol, use alcohol, or recover from its effects. sensus Panel provides a guide for the use of 8 4. Craving, or a strong desire or urge to use alcohol. acamprosate, disulfiram, and naltrexone. 5. Recurrent alcohol use resulting in a failure to fulfill major role obligations No medications are approved for the treat- at work, school, or home. ment of AUD in adolescents younger than 6. Continued alcohol use despite having persistent or recurrent social or 18 years; therefore, these patients should be interpersonal problems caused or exacerbated by the effects of alcohol. referred for subspecialist treatment. None of 7. Important social, occupational, or recreational activities are given up or the medications used to treat AUD have been reduced because of alcohol use. proven completely safe during or 8. Recurrent alcohol use in situations in which it is physically hazardous. lactation, so they should be used cautiously 9. Alcohol use is continued despite knowledge of having a persistent or recurrent physical or psychological problem that is likely to have been in women of childbearing age. caused or exacerbated by alcohol. 10. Tolerance, as defined by either of the following: Medications for the Treatment of AUD a. A need for markedly increased amounts of alcohol to achieve An Agency for Healthcare Research and intoxication or desired effect. Quality (AHRQ) review that included b. A markedly diminished effect with continued use of the same amount 135 studies of pharmacologic treatment of of alcohol. AUD in outpatient settings found moder- 11. Withdrawal, as manifested by either of the following: ate evidence to support the use of naltrexone a. The characteristic withdrawal syndrome for alcohol. and acamprosate, and insufficient evidence b. Alcohol (or a closely related substance, such as a benzodiazepine) is taken to relieve or avoid withdrawal symptoms. to support the use of disulfiram. The review Specify if: also concluded that the evidence was lacking In early remission: After full criteria for alcohol use disorder were previously for most other medications, including those met, none of the criteria for alcohol use disorder have been met for at least for off-label use and those undergoing trials. 3 months but for less than 12 months (with the exception that Criterion A4, However, there is some evidence for topira- “Craving, or a strong desire or urge to use alcohol,” may be met). mate (Topamax) and valproic acid (Depak- In sustained remission: After full criteria for alcohol use disorder were 12 previously met, none of the criteria for alcohol use disorder have been met ene). Table 3 summarizes the medications 13 at any time during a period of 12 months or longer (with the exception that used to treat AUD. Criterion A4, “Craving, or a strong desire or urge to use alcohol,” may be met). Specify if: APPROVED BY THE U.S. FOOD AND DRUG ADMINISTRATION In a controlled environment: This additional specifier is used if the individual is in an environment where access to alcohol is restricted. Acamprosate. This drug appears to be most

Reprinted with permission from the American Psychiatric Association. Diagnostic and effective at maintaining abstinence in Statistical Manual of Mental Disorders. 5th ed. Washington, DC: American Psychiatric patients who are not currently drinking alco- Association; 2013:490-491. hol.14 Acamprosate seems to interact with glu- tamate at the N-methyl-D-aspartate receptor,

458 American Family Physician www.aafp.org/afp Volume 93, Number 6 ◆ March 15, 2016 Alcohol Use Disorder SORT: KEY RECOMMENDATIONS FOR PRACTICE

Evidence Clinical recommendation rating References although its exact mechanism is unclear.15 Acamprosate (Campral) increases abstinence A 9, 12, 16 It is safe in patients with impaired hepatic rates in patients with alcohol use disorder. There is inconsistent evidence supporting the B 12, 18, 19 function but should be avoided in patients use of disulfiram (Antabuse) to decrease with severe renal dysfunction. A systematic alcohol intake in patients with alcohol use review of 27 studies including 7,519 patients disorder. using acamprosate showed a number needed Naltrexone (Revia) decreases alcohol A 9, 12, 21 to treat (NNT) of 12 to prevent a return to consumption in patients with alcohol use disorder. any drinking.9 A Cochrane review of 24 tri- Topiramate (Topamax) may decrease alcohol B 27-31 als including 6,915 patients concluded that intake in patients with alcohol use disorder. acamprosate reduced drinking compared Ondansetron (Zofran) may decrease alcohol B 41, 42 with placebo (NNT = 9).16 One randomized intake in patients with alcohol use disorder. trial found no difference between acam- prosate and placebo, although outcomes A = consistent, good-quality patient-oriented evidence; B = inconsistent or limited- quality patient-oriented evidence; C = consensus, disease-oriented evidence, usual improved significantly in both groups. This practice, expert opinion, or case series. For information about the SORT evidence may be because enrolled patients were highly rating system, go to http://www.aafp.org/afpsort. motivated to decrease alcohol use, increasing the likelihood of success with any treatment.17 Disulfiram. There are limited trials to sup- supervision over 12 weeks and determined port the effectiveness of disulfiram. It does that patients taking disulfiram had fewer not reduce the craving for alcohol, but it heavy drinking days, lower weekly con- causes unpleasant symptoms when alcohol sumption, and a longer period of abstinence is ingested because it inhibits aldehyde dehy- compared with the other drugs.18 However, drogenase and alcohol metabolism. Compli- a 2014 meta-analysis of 22 randomized tri- ance is a major limitation, and disulfiram is als found that in open-label studies, disul- more effective when taken under supervi- firam was more effective than naltrexone, sion. One trial randomized 243 patients to acamprosate, and no disulfiram, but blinded naltrexone, acamprosate, or disulfiram with studies did not demonstrate benefit for disul- firam.19 In a systematic review of two studies including 492 patients, disulfiram did not reduce drinking rates.9 As noted earlier, the Table 2. Validated Screening AHRQ review found insufficient evidence to Methods for Alcohol Use Disorder 12 Recommended by the U.S. support disulfiram’s effectiveness. Preventive Services Task Force Naltrexone. Naltrexone, an antago- nist, reduces alcohol consumption in patients AUDIT (10-item questionnaire) with AUD, and is more successful in those http://www.talkingalcohol.com/files/pdfs/ who are abstinent before starting the medi- WHO_audit.pdf cation.8 The opioid receptor system mediates Abbreviated AUDIT-C (three-item questionnaire) the pleasurable effects of alcohol. Alcohol http://www.integration.samhsa.gov/images/res/ tool_auditc.pdf ingestion stimulates endogenous opioid Single-question screening* release and increases transmis- “How many times in the past year have you had sion. Naltrexone blocks these effects, reduc- five (for men) or four (for women and all adults ing euphoria and cravings.20 Naltrexone is older than 65 years) or more drinks per day?” available in oral and injectable long-acting formulations. NOTE: All of these screening tests are self-reported. A Cochrane review that included 50 ran- AUDIT = Alcohol Use Disorders Identification Test; AUDIT-C = Alcohol Use Disorders Identification domized trials and 7,793 patients found Test–Consumption. that oral naltrexone decreased heavy drink- *—An answer of one or more is considered a posi- ing (NNT = 10) and slightly decreased tive screen. daily drinking (NNT = 25). The number Information from references 4 and 5. of heavy drinking days and the amount of alcohol consumed also decreased. Injectable

March 15, 2016 ◆ Volume 93, Number 6 www.aafp.org/afp American Family Physician 459 Alcohol Use Disorder Table 3. Medications for the Treatment of Alcohol Use Disorder

FDA approved for alcohol Medication use disorder Dosage Adverse effects Contraindications* Comments Cost†

Acamprosate‡ Yes Two 333-mg enteric-coated tablets three times , insomnia, anxiety, depression, asthenia, Severe renal impairment (creatinine Pregnancy category C, safety unknown in breastfeeding $55 ($145) (Campral) per day anorexia, pain, flatulence, , dizziness, clearance < 30 mL per minute per Moderate renal impairment (creatinine pruritus, dry mouth, paresthesia, sweating 1.73 m2) clearance of 30 to 50 mL per minute per 1.73 m2 [0.50 to 0.83 mL per second per m2]): initially, one tablet three times per day

Disulfiram Yes Begin with 250 mg once per day; if not Disulfiram-alcohol interaction: flushing, palpitations, Alcohol, metronidazole (Flagyl), Initiate only after patient has abstained from alcohol for at least 12 hours $50 ($190) (Antabuse) effective, increase to 500 mg once per day nausea, , headache or paraldehyde use; ; Patient should carry an identification card describing the disulfiram- Optic neuritis, peripheral neuritis, polyneuritis, peripheral cardiovascular disease alcohol interaction; function should be monitored for neuropathy, hepatitis, drowsiness, fatigability, hepatotoxicity impotence, headache, acneiform eruptions, allergic Pregnancy category C, safety unknown in breastfeeding dermatitis, metallic or garlic-like aftertaste

Fluoxetine No Begin with 20 mg per day; may increase to Ejaculatory dysfunction, nausea, headache, insomnia, Use of an MAOI such as Recommended only in patients with comorbid depression $4 ($330) (Prozac) 60 to 80 mg per day nervousness, somnolence, anxiety, diarrhea, (Serentil), , or linezolid Pregnancy category C, safety unknown in breastfeeding anorexia, dry mouth, tremor, asthenia, sweating, (Zyvox) dyspepsia, influenza-like illness, syndrome FDA warning§

Gabapentin No Variable Dizziness, somnolence, fatigue, peripheral edema, None Use lower dose if patient has renal impairment (creatinine clearance $11 ($200) (Neurontin) Studies have used 300 mg twice per day or hostility, diarrhea, asthenia, infection, dry mouth, < 60 mL per minute per 1.73 m2 [1.00 mL per second per m2]) once-daily dosages up to 1,800 mg at bedtime nystagmus, , nausea, vomiting, ataxia, Decreases levels of hydrocodone in a dose-dependent manner fever, amblyopia Could begin with 300 mg per day on the Decreased with aluminum hydroxide/magnesium first day, then 300 mg twice per day on the hydroxide second day and 300 mg three times per day may increase levels of gabapentin on the third day; may increase to maximum Pregnancy category C, limited data that it is safe in breastfeeding dosage of 1,800 mg per day

Naltrexone Yes Oral: 50 to 100 mg per day (alternative dosing: Nausea, vomiting, headache, dizziness, nervousness, Opioid use, acute opioid withdrawal, Liver function tests should be performed to monitor for hepatotoxicity Oral: $45 ($106) (Revia [oral], 50 mg every weekday with a 100-mg dose fatigue, low energy, insomnia, anxiety, difficulty acute hepatitis, liver failure Pregnancy category C, safety unknown in breastfeeding Injectable: not Vivitrol on Saturday, 100 mg every other day, or sleeping, abdominal pain or cramps, joint or available ($1,300) [injectable])‡ 150 mg every third day) muscle pain Injectable: 380 mg once every four weeks

Ondansetron No 4 mcg per kg twice per day (higher dosages Malaise, fatigue, headache, dizziness, anxiety, use Patients with electrolyte abnormalities should be monitored with $20 ($670) (Zofran) may be used); available in 4-mg, 8-mg, ; QT interval prolongation and electrocardiography 16-mg, and 24-mg oral doses have been reported Should be avoided in patients with congenital long QT syndrome Pregnancy category B, safety unknown in breastfeeding

Sertraline No Begin with 50 mg per day; may increase to Ejaculatory dysfunction, dry mouth, sweating, Use of an MAOI such as mesoridazine, May be helpful in patients with comorbid depression when prescribed $10 ($210) (Zoloft) 200 mg per day somnolence, fatigue, tremor, anorexia, dizziness, thioridazine, or linezolid in conjunction with naltrexone headache, diarrhea, dyspepsia, nausea, constipation, Pregnancy category C, safe in breastfeeding agitation, insomnia, serotonin syndrome FDA warning§

Topiramate No Begin with 25-mg dose; increase to a total of Hyperchloremic, nonanion gap, metabolic acidosis; None Serum bicarbonate and blood ammonia levels should be monitored $10 ($140) (Topamax) 300 mg given twice per day in divided doses acute myopia associated with secondary angle- Pregnancy category D, safety unknown in breastfeeding Renal impairment (creatinine clearance < 60 mL closure glaucoma has been reported per minute per 1.73 m2 [1.17 mL per second Anorexia, anxiety, diarrhea, fatigue, fever, per m2]): one-half of usual dosage infection, weight loss, cognitive problems, paresthesia, somnolence, taste perversion, mood problems, nausea, nervousness, confusion

FDA = U.S. Food and Drug Administration; MAOI = monoamine oxidase inhibitor. *—Other than hypersensitivity to the drug, which is a possible contraindication for all medications listed. †—Estimated retail price of one month’s supply based on information obtained from http://www.goodrx.com (accessed December 3, 2015). Generic price listed first, brand price listed in parentheses. ‡—Good evidence to support use in patients with alcohol use disorder. §— increased the risk of suicidal thinking and behavior (suicidality) in children, adolescents, and young adults in short-term studies of major depressive disorder and other psychiatric disorders. Information from reference 13. Alcohol Use Disorder Table 3. Medications for the Treatment of Alcohol Use Disorder

FDA approved for alcohol Medication use disorder Dosage Adverse effects Contraindications* Comments Cost†

Acamprosate‡ Yes Two 333-mg enteric-coated tablets three times Diarrhea, insomnia, anxiety, depression, asthenia, Severe renal impairment (creatinine Pregnancy category C, safety unknown in breastfeeding $55 ($145) (Campral) per day anorexia, pain, flatulence, nausea, dizziness, clearance < 30 mL per minute per Moderate renal impairment (creatinine pruritus, dry mouth, paresthesia, sweating 1.73 m2) clearance of 30 to 50 mL per minute per 1.73 m2 [0.50 to 0.83 mL per second per m2]): initially, one tablet three times per day

Disulfiram Yes Begin with 250 mg once per day; if not Disulfiram-alcohol interaction: flushing, palpitations, Alcohol, metronidazole (Flagyl), Initiate only after patient has abstained from alcohol for at least 12 hours $50 ($190) (Antabuse) effective, increase to 500 mg once per day nausea, vomiting, headache or paraldehyde use; psychosis; Patient should carry an identification card describing the disulfiram- Optic neuritis, peripheral neuritis, polyneuritis, peripheral cardiovascular disease alcohol interaction; liver function should be monitored for neuropathy, hepatitis, drowsiness, fatigability, hepatotoxicity impotence, headache, acneiform eruptions, allergic Pregnancy category C, safety unknown in breastfeeding dermatitis, metallic or garlic-like aftertaste

Fluoxetine No Begin with 20 mg per day; may increase to Ejaculatory dysfunction, nausea, headache, insomnia, Use of an MAOI such as mesoridazine Recommended only in patients with comorbid depression $4 ($330) (Prozac) 60 to 80 mg per day nervousness, somnolence, anxiety, diarrhea, (Serentil), thioridazine, or linezolid Pregnancy category C, safety unknown in breastfeeding anorexia, dry mouth, tremor, asthenia, sweating, (Zyvox) dyspepsia, influenza-like illness, serotonin syndrome FDA warning§

Gabapentin No Variable Dizziness, somnolence, fatigue, peripheral edema, None Use lower dose if patient has renal impairment (creatinine clearance $11 ($200) (Neurontin) Studies have used 300 mg twice per day or hostility, diarrhea, asthenia, infection, dry mouth, < 60 mL per minute per 1.73 m2 [1.00 mL per second per m2]) once-daily dosages up to 1,800 mg at bedtime nystagmus, constipation, nausea, vomiting, ataxia, Decreases levels of hydrocodone in a dose-dependent manner fever, amblyopia Could begin with 300 mg per day on the Decreased bioavailability with aluminum hydroxide/magnesium first day, then 300 mg twice per day on the hydroxide second day and 300 mg three times per day Opioids may increase levels of gabapentin on the third day; may increase to maximum Pregnancy category C, limited data that it is safe in breastfeeding dosage of 1,800 mg per day

Naltrexone Yes Oral: 50 to 100 mg per day (alternative dosing: Nausea, vomiting, headache, dizziness, nervousness, Opioid use, acute opioid withdrawal, Liver function tests should be performed to monitor for hepatotoxicity Oral: $45 ($106) (Revia [oral], 50 mg every weekday with a 100-mg dose fatigue, low energy, insomnia, anxiety, difficulty acute hepatitis, liver failure Pregnancy category C, safety unknown in breastfeeding Injectable: not Vivitrol on Saturday, 100 mg every other day, or sleeping, abdominal pain or cramps, joint or available ($1,300) [injectable])‡ 150 mg every third day) muscle pain Injectable: 380 mg once every four weeks

Ondansetron No 4 mcg per kg twice per day (higher dosages Malaise, fatigue, headache, dizziness, anxiety, Apomorphine use Patients with electrolyte abnormalities should be monitored with $20 ($670) (Zofran) may be used); available in 4-mg, 8-mg, serotonin syndrome; QT interval prolongation and electrocardiography 16-mg, and 24-mg oral doses torsades de pointes have been reported Should be avoided in patients with congenital long QT syndrome Pregnancy category B, safety unknown in breastfeeding

Sertraline No Begin with 50 mg per day; may increase to Ejaculatory dysfunction, dry mouth, sweating, Use of an MAOI such as mesoridazine, May be helpful in patients with comorbid depression when prescribed $10 ($210) (Zoloft) 200 mg per day somnolence, fatigue, tremor, anorexia, dizziness, thioridazine, or linezolid in conjunction with naltrexone headache, diarrhea, dyspepsia, nausea, constipation, Pregnancy category C, safe in breastfeeding agitation, insomnia, serotonin syndrome FDA warning§

Topiramate No Begin with 25-mg dose; increase to a total of Hyperchloremic, nonanion gap, metabolic acidosis; None Serum bicarbonate and blood ammonia levels should be monitored $10 ($140) (Topamax) 300 mg given twice per day in divided doses acute myopia associated with secondary angle- Pregnancy category D, safety unknown in breastfeeding Renal impairment (creatinine clearance < 60 mL closure glaucoma has been reported per minute per 1.73 m2 [1.17 mL per second Anorexia, anxiety, diarrhea, fatigue, fever, per m2]): one-half of usual dosage infection, weight loss, cognitive problems, paresthesia, somnolence, taste perversion, mood problems, nausea, nervousness, confusion

FDA = U.S. Food and Drug Administration; MAOI = monoamine oxidase inhibitor. *—Other than hypersensitivity to the drug, which is a possible contraindication for all medications listed. †—Estimated retail price of one month’s supply based on information obtained from http://www.goodrx.com (accessed December 3, 2015). Generic price listed first, brand price listed in parentheses. ‡—Good evidence to support use in patients with alcohol use disorder. §—Antidepressants increased the risk of suicidal thinking and behavior (suicidality) in children, adolescents, and young adults in short-term studies of major depressive disorder and other psychiatric disorders. Information from reference 13. Alcohol Use Disorder

naltrexone did not decrease heavy drinking, decrease alcohol consumption, but data but the sample size was small.21 are limited. A Cochrane review of 25 trials A subsequent systematic review of 53 including 2,641 patients showed that those randomized trials including 9,140 patients taking an anticonvulsant (i.e., topiramate, found that oral naltrexone increased absti- gabapentin [Neurontin], valproate, leveti- nence rates (NNT = 20) and decreased heavy racetam [Keppra], oxcarbazepine [Trileptal], drinking (NNT = 12). There was no differ- zonisamide [Zonegran], carbamazepine ence between naltrexone and acamprosate. [Tegretol], pregabalin [Lyrica], or tiagabine Injectable naltrexone did not demonstrate [Gabitril]) consumed 1.5 fewer drinks per benefit.9 A randomized trial of 627 veterans day than those taking placebo. There was no with AUD who received injectable naltrex- difference in abstinence rates compared with one or placebo found that 380 mg of naltrex- naltrexone, but anticonvulsants were associ- one given intramuscularly decreased heavy ated with fewer heavy drinking days and a drinking days over six months but did not longer time to relapse; many of the studies increase abstinence rates.22 were of low quality.26 Another meta-analysis found no difference Topiramate appears to decrease alcohol in heavy drinking between acamprosate and consumption. The AHRQ review concluded naltrexone; however, it favored acampro- that there is moderate evidence that topi- sate for abstinence and naltrexone for crav- ramate decreases number of drinking days, ings.14 Studies of combination therapy with heavy drinking days, and drinks per day acamprosate and naltrexone have produced based on two randomized trials.12,27,28 An mixed results. The COMBINE study did not open-label study compared topiramate plus show that combined therapy was more effec- psychotherapy with psychotherapy alone tive than either agent alone.23 Another study in hospitalized patients after alcohol with- showed that relapse rates were lower with drawal treatment. The topiramate group combined therapy compared with placebo had lower rates of depression and anxiety or acamprosate alone, but not compared and a lower relapse rate after four months.29 with naltrexone alone.24 It is unclear if and However, a randomized trial of 106 patients when combination therapy should be used, did not show a difference in alcohol con- although it may be reasonable to consider sumption between topiramate therapy and it if monotherapy fails. Opioid antagonists placebo.30 Another randomized trial found may also be helpful when used as needed that topiramate increased abstinence rates during high-risk situations, such as social in patients with a specific genetic polymor- events or weekends.25 phism.31 Such targeted medication use for Naltrexone is well tolerated and is not specific populations warrants further study. habit-forming. Because it is metabolized by Three randomized trials suggest a pos- the liver, hepatotoxicity is possible, although sible benefit from gabapentin. A study of uncommon. Patients with AUD may have 150 patients found higher abstinence rates liver dysfunction; therefore, caution is war- in those taking gabapentin compared with ranted. Naltrexone can precipitate severe placebo (NNT = 8), as well as lower rates opioid withdrawal in patients who are of heavy drinking, improved mood, fewer opioid-dependent, so these agents should cravings, and improved sleep.32 A study of not be used together, and opioids should not 60 males with an average alcohol consump- be used for at least seven days before start- tion of 17 drinks per day in the previous ing naltrexone.8 Pain management is chal- 90 days who underwent alcohol withdrawal lenging for patients taking naltrexone; these treatment and were treated with gabapentin patients should carry a medical alert card. or placebo found that those in the gabapen- tin group had fewer heavy drinking days OFF-LABEL MEDICATIONS and drank less during the 30-day trial.33 A Anticonvulsants. There are several anticon- small study of 21 patients had similar results vulsants that may help patients with AUD and also found that gabapentin was more

462 American Family Physician www.aafp.org/afp Volume 93, Number 6 ◆ March 15, 2016 Alcohol Use Disorder

effective at improving sleep over the first hostility.42 This effect may be due to the six weeks of therapy. Dosages of gabapentin serotonin-3 antagonist properties of ondan- used in the study varied from 300 mg twice setron. In another randomized trial, men per day to 1,800 mg at bedtime.34 Longer taking ondansetron (8 mg twice per day) studies are needed to evaluate gabapentin for had fewer heavy drinking days compared AUD. with those taking placebo, although they did Pregabalin is classified as a controlled sub- not have increased abstinence rates.43 The stance, and there are limited data regarding combination of ondansetron (4 mcg per kg its use in AUD. A randomized trial compar- twice per day) and naltrexone (25 mg twice ing pregabalin and naltrexone in 71 patients per day) may be effective in treating early found no difference in drinking outcomes AUD.43 The dosages commonly studied (4 to or cravings, but the pregabalin group 16 mcg per kg twice per day) are much lower had less anxiety, hostility, and psychotic than the current available formulations of symptomatology.35 4-mg and 8-mg tablets. Antidepressants. Antidepressants are not Other. There is inconclusive evidence to effective in decreasing alcohol use in per- support baclofen (Lioresal) and various sup- sons without coexisting mental health dis- plements for AUD. Gamma hydroxybutyrate orders.36 Antidepressants can be helpful in is used in some countries to treat AUD; how- some instances, however, because patients ever, because of its central nervous system with AUD often have coexisting men- effects and its potential use as a date rape tal health disorders. A trial randomized drug, it is not recommended.44 170 patients with alcohol dependence and Data Sources: A PubMed search was conducted in depression to 14 weeks of cognitive behav- Clinical Queries using the terms alcoholic intoxication, ior therapy plus sertraline (Zoloft; 200 mg alcoholism, alcohol-related diseases, alcohol use disorder, per day), naltrexone (100 mg per day), both treatment, and medications. The search included random- ized controlled trials, meta-analyses, systematic reviews, medications, or double placebo. Those tak- clinical trials, and reviews. Also searched were Essential ing a combination of sertraline and nal- Evidence Plus, the Cochrane database, the Agency for trexone had higher abstinence rates and a Healthcare Research and Quality evidence reports, the longer delay before relapse to heavy drink- National Guideline Clearinghouse database, and the U.S. Preventive Services Task Force. Search dates: September ing compared with those taking placebo or 9, 2014; January 11, 2015; February 21, 2015; February either agent alone. Neither agent alone was 28, 2015; August 13, 2015; and January 16, 2016. 37 superior to placebo. A study of patients NOTE: This review updates a previous article on this topic with AUD and major depression found that by Williams.45 20 to 40 mg per day of fluoxetine (Prozac) reduced drinking, drinking days, and heavy The Authors drinking days over 12 weeks.38 There is inconclusive evidence regarding the effec- BRADFORD T. WINSLOW, MD, is program director of the Swedish Family Medicine Residency Program in Littleton, tiveness of treating AUD with the atypical Colo. He is also an associate professor of family medicine (Zyprexa) and at the University of Colorado School of Medicine in Aurora. (Seroquel). MARY ONYSKO, PharmD, BCPS, is an associate professor Ondansetron. Ondansetron (Zofran) may of pharmacy practice at the University of Wyoming School decrease alcohol consumption in patients of Pharmacy in Laramie, and a faculty member at the with AUD. In three studies, ondansetron Swedish Family Medicine Residency Program. (4 mcg per kg twice per day) combined MELANIE HEBERT, MD, is a physician with Kaiser Perma- with cognitive behavior therapy decreased nente in Highlands Ranch, Colo. At the time this article was written, she was a third-year resident at the Swedish alcohol consumption and cravings and Family Medicine Residency Program. increased abstinence in young adults with early AUD.39-41 In another trial, a higher Address correspondence to Bradford T. Winslow, MD, Swedish Family Medicine Residency, 191 E. Orchard dosage of ondansetron (16 mcg per kg twice Rd., Ste. 200, Littleton, CO 80121 (e-mail: bradford. per day) combined with cognitive behavior [email protected]). Reprints are not avail- therapy decreased depression, anxiety, and able from the authors.

March 15, 2016 ◆ Volume 93, Number 6 www.aafp.org/afp American Family Physician 463 Alcohol Use Disorder

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