GLP-1 Therapies Newsletter
Issue #21January 26, 20267 studies

GLP-1 drugs may fight addiction, and reduce alcohol consumption

This week's research reveals GLP-1 drugs doing double duty—tackling both obesity and unexpected conditions like addiction and fibromyalgia—while head-to-head comparisons show which treatments work best.

🧠 GLP-1 drugs may help treat addiction beyond weight loss

  • 41 studies (35 preclinical, 6 clinical) found GLP-1 receptor agonists like semaglutide and liraglutide reduced substance intake and relapse-like behaviors across alcohol, nicotine, cocaine, and opioids

  • The drugs appear to work by activating GLP-1 receptors in brain reward circuits including the nucleus accumbens and ventral tegmental area—the same regions involved in addiction

  • Clinical studies showed particular promise for alcohol use disorder, with GLP-1 drugs reducing both alcohol consumption and cravings in several trials, though sample sizes were small

Why it matters: GLP-1 drugs may represent a novel approach to addiction treatment by targeting the same brain pathways that control both food reward and substance abuse—potentially helping millions struggling with addiction.

Top 20% journal 🔗 Frontiers in pharmacology Systematic Review 🗓️ Jan 19

Key Findings

⚖️ Sleeve gastrectomy beats semaglutide for weight loss

  • 71 adults with obesity were assigned to either sleeve gastrectomy surgery or weekly semaglutide injections for 24 weeks

  • At 12 months, surgery achieved 28.6% total weight loss compared to 11.3% with semaglutide

  • Among 25 patients who stopped semaglutide after 6 months, 32% regained their baseline weight or higher by 12 months

💡 Surgery may offer more durable weight loss than GLP-1 drugs, but the medication provides a less invasive option with meaningful results.
🥉 Top 5% journal 🔗 BMC medicine Journal Article 🗓️ Jan 22

💪 GLP-1 drugs linked to reduced fibromyalgia symptoms

  • 48,025 fibromyalgia patients using GLP-1 drugs were compared to 48,025 matched patients not using them over 5 years

  • GLP-1 users had 35% lower odds of opioid prescriptions, 21% lower odds of pain diagnostic codes, and 32% lower odds of fatigue diagnostic codes

  • The association held even after accounting for diabetes, obesity, and other health conditions

💡 GLP-1 drugs may offer unexpected benefits for chronic pain conditions beyond their known effects on weight and blood sugar.
🎖️ Top 10% journal 🔗 Rheumatology (Oxford, England) Journal Article 🗓️ Jan 24

🫀 SGLT2 inhibitors may protect kidneys better than GLP-1 drugs

  • 55,061 veterans with type 2 diabetes starting either SGLT2 inhibitors or GLP-1 drugs were followed for kidney and heart outcomes

  • SGLT2 inhibitor users had 19% lower risk of chronic kidney disease and 12% fewer acute kidney injury episodes over 5 years

  • However, GLP-1 drug users had 14% lower risk of major cardiac events (heart failure, heart attack, stroke)

💡 The choice between these diabetes drugs may depend on whether kidney protection or heart protection is the priority.
🥈 Top 2% journal 🔗 Journal of the American Society of Nephrology : JASN Journal Article 🗓️ Jan 21

🔥 Tirzepatide reduces diabetic eye complications

  • 173,846 patients with diabetes (86,923 on tirzepatide, 86,923 matched controls) were followed for 12 months

  • Tirzepatide users had 30% lower risk of proliferative diabetic retinopathy, 38% lower risk of diabetic macular edema, and 52% fewer anti-VEGF eye injections

  • The drug also reduced risk of serious complications like vitreous hemorrhage (39% lower) and retinal detachment (63% lower)

💡 Tirzepatide may protect vision in people with diabetes beyond its effects on blood sugar and weight.
🥈 Top 2% journal 🔗 Ophthalmology Journal Article 🗓️ Jan 23

🍺 Real-world data shows GLP-1 drugs reduce alcohol consumption

  • 1,214 people prescribed GLP-1 drugs were compared to 1,063 matched individuals not taking them in a large healthcare system

  • Both groups reduced their weekly alcohol consumption, but GLP-1 users had a greater reduction (1.81 vs 1.38 drinks per week)

  • The effect was most pronounced in people with low-risk baseline alcohol use (92.8% of the GLP-1 group)

💡 GLP-1 drugs may help reduce alcohol consumption even in people who aren't heavy drinkers, supporting their potential for addiction treatment.
🎖️ Top 10% journal 🔗 Biological psychiatry global open science Journal Article 🗓️ Jan 19

🦴 GLP-1 drugs may improve bone healing but increase wound complications

  • 1,504 patients undergoing midfoot fusion surgery (752 on GLP-1 drugs, 752 controls) were followed for complications

  • GLP-1 users had 29% lower odds of bone nonunion at 1 year, suggesting better bone healing

  • However, they had 71% higher rates of wound complications at 90 days and more than double the rate of mechanical complications at 1 year

💡 GLP-1 drugs may help bones heal after surgery, but surgeons should watch for increased wound and hardware problems.
Top 30% journal 🔗 J Foot Ankle Surg Journal Article 🗓️ Jan 21

Implications

GLP-1 drugs are proving to be remarkably versatile medications, with benefits extending far beyond diabetes and weight loss to potentially include addiction treatment, chronic pain relief, and organ protection. However, the research also highlights important trade-offs—while these drugs show promise for many conditions, surgical options still provide superior weight loss, and different diabetes medications may be better for specific complications.

Studies in this issue

Primary sources used for this newsletter.

  1. Possible use of GLP-1 receptor drugs to treat substance use disorders
    main storyFrontiers in pharmacology2026-01-19PMID 41552827
  2. Use of Glucagon-Like Peptide-1 Receptor Drugs and Alcohol Consumption in a Large Health Care Population
    key findingBiological psychiatry global open science2026-01-19PMID 41552778
  3. How SGLT2 inhibitors and GLP-1 receptor agonists compare in protecting the kidneys and heart based on risk of kidney failure
    key findingJournal of the American Society of Nephrology : JASN2026-01-21PMID 41563358
  4. Effects of GLP-1 receptor drugs in people with fibromyalgia compared to similar patients
    key findingRheumatology (Oxford, England)2026-01-24PMID 41578948
  5. Link Between GLP-1 Receptor Agonist Use and Results After Midfoot Joint Fusion Surgery
    key findingThe Journal of foot and ankle surgery : official publication of the American College of Foot and Ankle Surgeons2026-01-21PMID 41565054