Top 20 Research Studies of 2024 for Primary Care Physicians

Roland Grad, MD, MSc
Mark H. Ebell, MD, MS

American Family Physician. 2025;112(1):34-41.

Author disclosure: Dr. Ebell is cofounder and editor-in-chief of Essential Evidence Plus; see Editor’s Note. Dr. Grad has no relevant financial relationships.

This clinical content conforms to AAFP criteria for CME.

Published online June 16, 2025.

This article summarizes the top 20 research studies of 2024 identified as POEMs (patient-oriented evidence that matters). Based on a network meta-analysis, the oral antibiotics most likely to be effective for community-acquired pneumonia are telithromycin (not available in the United States), azithromycin, amoxicillin-clavulanate, and the quinolones levofloxacin and nemonoxacin (not available in the United States). The oral antivirals molnupiravir and nirmatrelvir-ritonavir reduce hospitalizations in immunocompromised patients with COVID-19. In average-risk infants, a single dose of nirsevimab reduces hospitalizations due to respiratory syncytial virus. Amoxicillin with or without clavulanate is more effective than placebo for children with symptoms of acute sinusitis. Benzyl benzoate 25% is highly effective for scabies in adolescents and adults. Lactobacillus-containing probiotics reduce the incidence of recurrent urinary tract infections (UTIs) in premenopausal women with frequent UTIs. Low-dose amitriptyline is effective as second-line therapy for irritable bowel syndrome. For patients with uncomplicated gallstones, conservative management is a reasonable option. Sodium-glucose cotransporter-2 (SGLT-2) inhibitors and glucagon-like peptide-1 (GLP-1) receptor agonists are better than older drugs at improving patient-oriented outcomes for type 2 diabetes. Continuous or intermittent glucose monitoring is minimally effective for control of type 2 diabetes and can be harmful. Phentermine-topiramate and GLP-1 receptor agonists are the most effective drugs for promoting weight loss. Semaglutide is effective for secondary prevention of cardiovascular disease in people with obesity and no diabetes. SGLT-2 inhibitors and GLP-1 receptor agonists decrease cardiovascular death in older adults with type 2 diabetes and heart failure. Beta blockers do not prevent subsequent events after myocardial infarction in patients with preserved ejection fraction. For patients who do not quit smoking after a trial of varenicline or combined nicotine replacement therapy, a higher dose of either drug can increase quit rates. e-Cigarettes increase abstinence from smoking, but long-term vaping is a consequence for some. Oral naltrexone and acamprosate are safe and effective treatments for alcohol use disorder. Cognitive behavior therapy can reduce fatigue attributed to long COVID. New monoclonal antibodies for Alzheimer disease are harmful, expensive, and minimally effective. Clinicians may choose to deliver bad news in person or by telephone, using their judgment or patient preference to decide which is best for the patient.

ROLAND GRAD, MD, MSc, is an associate professor in the Department of Family Medicine at McGill University, Montreal, Canada.

MARK H. EBELL MD, MS, is a professor in the Department of Family Medicine at Michigan State University, East Lansing.

Published online June 16, 2025.

Address correspondence to Mark H. Ebell MD, MS, at ebell@msu.edu.

Author disclosure: Dr. Ebell is cofounder and editor-in-chief of Essential Evidence Plus; see Editor’s Note. Dr. Grad has no relevant financial relationships.

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  15. 15.Yndigegn T, Lindahl B, Mars K, et al.; REDUCE-AMI Investigators. Beta-blockers after myocardial infarction and preserved ejection fraction. N Engl J Med. 2024;390(15):1372-1381.
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