57. Pharmacological alternatives for the treatment of alcohol and other substance abuse

I. The goals of pharmacological alternatives

According to the Recovery Research Institute’s website, https://www.recoveryanswers.org/resource/pharmacotherapy-medication-assisted-treatments/, the goals of using drugs for the treatment of alcohol and other modalities of substance misuse are reduce the following:

  • The intensity of withdrawal symptoms;
  • Alcohol and other drug cravings;
  • The likelihood of use or relapse for specific drugs by blocking their effect.

The primary goal of medication-assisted treatment is for the patient to achieve fully-sustained remission.

Pharmacotherapy is often used together with other therapies such as Cognitive Behavioral Therapy (CBT), or 12-Step FacilitationMedications combined with these other therapies are shown to:

  • Improve rates of patient survival
  • Increase retention in treatment programs
  • Decrease illicit opiate use and substance-related criminal involvement
  • Increase patients’ ability to gain and maintain employment
  • Improve outcomes in pregnancies affected by substance use

Different medications are used for the treatment of alcohol use disorder, opioid use disorder, and nicotine/smoking cessation:

II. Medications for Alcohol Use Disorder (Please accept my apology for the very lengthy and narrow columns. There MUST be a way to expand the width of a table with the WordPress platform. I just don’t know what it is.)

Medication (and Brand names)Mode of actionHow TakenFor whomSide Effects
NalmefeneWorks similar to naltrexone, by acting on dopaminer-gic nucleus accumbens circuitry, it may reduce motivation for self-administra-tion and withdrawal-induced alcohol consump-tion.Orally“This medication may appeal to patients with goals of reducing alcohol consump-tion and those reluctant to engage in abstinence-based treatmentDizziness, nausea, vomiting, insomnia, and headache
BaclofenGabaB agonist, yields higher abstinence rates than placebo.OrallyMay be particularly useful in the treatment of AUD among individuals with liver disease.Depression, sedation, vertigo, headache, confusion, perspira-tion, muscle stiffness and/or abnormal move-ments, slurred speech and numbness.
Sodium oxybateActs as a partial GabaB agonist. Increased abstinence by up to 34% in a sample of 711 participants with very high drinking risk levelsOrallyReduces relapses when given with naltrexone and escita-lopram. Although SMO has craving and abuse potential, it has shown effective-ness with chronic, treatment-resistant alcohol depen-dence.Transitory dizziness and vertigo
VareniclineA nicotinic acetylcho-line receptor agonist used for treatment of nicotine depen-dence.
Significant-ly reduces weekly percent heavy-drinking days, drinks per day, drinks per drinking day.
OrallyEspecially relevant to heavy-drinking smokers. About 20-25% of current smokers are estimated to also be heavy drinkers. In one study, this drug reduced the number of drinks consumed and increased the likelihood of complete abstinenceNausea, Trouble sleeping, Strange or vivid dreams, Constipa-tion,
Gas, Vomiting.
Aripipra-zoleAntipsych-otic drug, acts as a partial agonist at the dopamine D2 and 5-HT1A receptors and as an antagonist at the 5-HT2A receptor. Reduces the euphoric effects of alcohol and increases sedative effect. One study with 99 participants with AUD showed a reduction in the number of drinks consumed in a bar lab setting, especially among individuals with low self-controlOrallyMay be more effective at lower doses and in more impulsive individuals.Fatigue, insomnia, restless-ness, anxiety, and deficits in attention.
OndasetronA 5-HT3 antagonist that is used to treat nausea and vomiting. May address serotoner-gic dysfunction in early-onset AUD, and may reduce alcohol craving, blocks acquisition and mainte-nance of ethanol self-administra-tion.OrallyMay be suitable for individuals with early-onset AUD.Generally mild side effects: diarrhea, constipa-tion and headache.
IbudilastSuppresses pro-inflamma-tory cytokines, increases anti-inflamma-tory cytokines. In one human laboratory cross-over trial, Ibudilast decreased tonic craving, improved mood during exposure to alcohol and stress cues, and reduced the mood-altering and stimulant effects of alcohol among participants with more severe depressive symptomsOrallyGenerally well tolerated. Adverse side effects include nausea, vomiting, abdominal pain and diarrhea
Prazosin and DoxazosinBoth act by blocking noradrener-gic excitation of the reward circuitry. Both are used for the treatment of hyperten-sion and benign prostate hyper-trophy.OrallyReduces drinks per week and heavy-drinking days among individuals with higher family history of AUD and higher standing diastolic blood pressure. May also be suitable for those with comorbid post-traumatic stress-disorder (PTSD)dizziness, headaches, drowsiness, lack of energy, weakness, palpita-tions, and nausea
N-Acetylcys-teineAs chronic and binge drinking inhibit excitatory glutamate levels, this drug restores glutama-tergic tone in brain’s reward circuitry.
OrallyReduces craving symptoms across a number of substance use disorders. Currently being tested in adolescent AUD.Nausea and diarrhea
Naltrexone (Revia, Vivitrol)Blocks the pleasurable effects of drinkingorally, taken daily, or as an intramus-cular injection once monthlyFor patients engaged in binge drinking and reward seekingNausea, headache, weakness, injection site reactions
Acampro-sate (Campral)Stabilizes areas in the brain that are disrupted by alcohol misuse & withdrawalOrally, delayed release tablets taken daily. Only known to work with behavioral therapy or peer supportFor patients with liver cirrhosisDiarrhea, upset gastro-intestinal system
Disulfiram (Antabuse)Prevents alcohol use by causing extremely unpleasant side effects when alcohol is ingested, e.g. vomiting, headaches.Orally, taken daily, or as a subdermal implantOnly for highly motivated patientsDrowsi-ness, headache, metallic taste
Semaglu-tide (Rybelsus)see details in section V belowOrallyOriginally developed for the treatment of obesity and diabetesNausea, Vomiting, Diarrhea, Stomach (abdomi-nal) pain, Decreased appetite, Consti-pation.
Liraglutidesee details in section V belowOrallyOriginally developed for the treatment of obesity and diabetesNausea, Vomiting, Diarrhea, Stomach (abdomi-nal) pain, Decreased appetite, Consti-pation.
Topiramate (Not FDA approved), (Topamax, Trakenol, Qudexy)Anti-seizure medication sometimes used to treat AUD. May encourage moderation & help with mood, anxiety & weight lossOrally, taken while drinkingFor patients that want to cut down on their drinking, but not stop altogether. May help with pain & anxietyCognitive dulling, word finding difficulty, ataxia, parasthesia
Gabapentin (Not FDA Approved), (Gralse, Horizant, NeurontinAnti-seizure medication to decrease number of drinks & number of heavy drinking daysOrally, tablet or liquid forms, taken dailyFor patients that want to cut down on their drinking, but not stop altogether. May help with pain & anxietySedation, dizziness, weight gain

III. Medications for Opoid Use Disorder

Medication (and brand names)Mode of actionHow takenFor WhomSide effects
Injectable Naltrexone (Vivitrol)Blocks the pleasurable effects of opiates to reduce the likelihood of relapse & opiate overdoseIntramus-cular injection once monthlyFor patients that may struggle to remember to take a daily medicationNausea, headache, weakness, injection site reactions
Buprenor-phine (Buprenex, Bulbuca, Butrans, Probuphine, Subutex)Prevents opiate withdrawal & cravings, also blocking against opiate overdoseOrally, take daily or transder-mally (skin patch) worn daily.For patients with low likelihood of misuse potentialHeadache, dizziness, trouble sleeping, tingling sensation
Buprenor-phine + Naloxone (Suboxone, Zubsolv, Bunavil)Prevents opiate withdrawal & cravings, also blacking against opiate overdose. The added naloxone decreases the misuse potentialOrally – sublingual tablets or films taken dailyFor patients with opioid use disorder with access to an office-based licensed prescriber. Misuse potential.Constipa-tion, dizziness, drowsiness, headache
Methadone (Dolophine, Methodose)Prevents opiate withdrawal and cravings, but at prescribed doses, does not create opiate-like effects.Orally – taken daily, admini-stered by a SAMSHA certified treatment program or clinicFor patients with the proximity & availability to attend a clinic daily. Misuse potentialSleep problems, anxiety, restless-ness, dry mouth, nausea, decreased sex drive.
Naloxone (Narcan)Counters the effects of an opiate overdoseInjection or oral spray – admini-stered only during an overdose emergencyFor opiate users during an overdose.Chest pain, shortness of breath, nausea, headache, anxiety, confusion

IV. Medications for Nicotine or Smoking Cessation

Medication (and brand names)Mode of actionHow takenFor WhomSide effects
Nicotine Replace-ment Therapies (NRT)Aids in smoking cessation by providing similar effects of tobacco use to decrease cravings, tapering or decreasing dose over timePatches, gum, lozenges, nasal spray & inhalersFor patients seeking to quit smoking by means of satisfying nicotine cravings over timeRacing heartbeat, headache, nausea, throat/skin irritation, nervous-ness.
Varenicline (Chantix)Gives mild nicotine-like effects & eases symptoms of withdrawal. Neutralizes the effects of nicotine if patient smokes while taking this medicationOrally – taken daily for 12 weeksFor patients seeking to quit smoking by means of a 12-week medication programTrouble sleeping, vivid dreams, headache, nausea, gas, behavioral changes
Buproprion (Welbutrin, Zyban, Buproban, Fortivo)Aids in smoking cessation by reducing the severity of nicotine cravings & withdrawal symptoms. Also functions as anti-depressantOrally – variety of doses & release patternsFor patients who smoke 10 or more cigarettes per day. May be used in combina-tion with NRTIncrease in risk for dry mouth, nausea, vomiting, weight gain/loss, stomach pain

V. Semaglutide and Liraglutide were originally developed for the treatment of type-2 diabetes and obesity. How did they end up here, among medications for the treatment of alcohol use disorder?

Semaglutide (AKA Rybelsus) and Liraglutide are Glucagon-like Protein-1 Receptor agonists, which have multiple targets and effects:

As food enters the small intestine, cells in the small intestine secrete GLP-1, which then affects the stomach, brain and pancreas:

  • Gastric emptying in the stomach slows down;
  • Various parts of the brain are affected resulting in a reduced appetite; and
  • The pancreas is stimulated to secrete insulin to remove glucose from the bloodstream, but is inhibited from secreting glucagon

Among humans, some variants of the GLP-1 receptor gene are associated with AUD. Furthermore, these variants in the GLP-1 receptor gene have been shown to be involved in many pathways related to craving and reward.

It stands to suggest that the use of a drug which enhances or mimics the effects of GLP-1 may exert a beneficial effect on individuals diagnosed with Alcohol Use Disorder, AUD.

In fact, Lahteenvuo et. al. (2025) did that with a study of 227,866 individuals diagnosed with AUD in Sweden between January 2006 to December 2023. Of them, 6,276 also used one of three GLP-1 agonists, including semaglutide, liraglutide, and dulaglutide.

All individuals who were thus diagnosed with AUD were monitored from initial AUD diagnosis to death, emigration or end of data linkage, whichever came first. The main outcome measure was hospitalization due to AUD. Secondary outcomes were hospitalization due to substance use disorder (SUD), hospitalization due to somatic reasons, and hospitalization due to suicide attempt.

Of the 227,866 individuals in the study, 133,210 were hospitalized because of AUD and 138,390 because of any SUD at least once. Use of semaglutide was associated with the lowest risk of hospitalization and liraglutide was associated with the second lowest risk.

Furthermore, a total of 83,166 individuals were hospitalized for somatic reasons and 22,231 for suicide attempt. Use of semaglutide was associated with the lowest risk, and use of liraglutide with the second lowest risk of somatic hospitalization. Use of either of these drugs was not associated with a statistically significantly altered risk of suicide attempt.

Burnette, E.M.; Nieto, S.J.; Grodin, E.N.; Meredith, L.R., Hurley, B., Miotto, K., Gillis, A.J.; Ray, L.A. (2022). Novel Agents for the Pharmacological Treatment of Alcohol Use Disorder. Drugs 82:251-274. https://doi.org/10.1007/s40265-021-01670-3.

Lahteenvuo, M.; Tiihonen, J.; Solismaa, A.; Tanskanen, A.; Mittendorfer-Rutz, E.; Taipale, H. (2025). Repurposing Semaglutide and Liraglutide for Alcohol Use Disorder. JAMA Psychiatry 82(1):94-98. doi: 10.1001/jamapsychiatry.2024.3599.

P.S.: The song is called “Antabuse”:

P.P.S.: “I overdosed on you”, Bon sez…

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