Global ENHANCE Programme Puts Homeopathy to the Test in the Fight Against Antibiotic Resistance

Antimicrobial resistance is one of the most formidable threats in modern medicine, and the frontline of the battle is not the intensive care unit but the family doctor’s surgery. Primary care accounts for roughly 80 percent of all human antibiotic use, much of it for infections such as earaches, sore throats and uncomplicated urinary tract infections that often resolve on their own. Against this backdrop, an international research collaboration called ENHANCE — the rEsearch programme oN Homeopathy and Antimicrobial resistaNCE — has spent the past three years asking a question that divides opinion as sharply as almost any in medicine: could homeopathy, whatever one thinks of its mechanisms, help reduce antibiotic prescribing without compromising patient care?

The programme, established in 2023 and coordinated by the Homeopathy Research Institute in London with substantial involvement from the University of Bristol, is described in a perspective article published in Frontiers in Antibiotics. Its authors are careful to frame the enterprise not as advocacy but as hypothesis testing. The central question is deliberately narrow: regardless of how homeopathic medicines might work, does their use produce a clinically meaningful reduction in antibiotic consumption for common primary care infections while keeping clinical outcomes acceptable? That is an empirical question, the researchers argue, and one that deserves the same methodological rigour applied to any other therapeutic candidate.

The scale of the problem justifies the effort. An estimated 4.95 million deaths were associated with bacterial antimicrobial resistance in 2019, according to the Global Burden of Disease analysis cited by the programme. The World Health Organization’s Global Action Plan on antimicrobial resistance identifies optimising antimicrobial use as a strategic priority, and the United Kingdom’s own 20-year vision emphasises cutting inappropriate prescribing while maintaining effective infection management. Yet the disconnect between need and practice is stark: around 78 percent of childhood cases of acute otitis media resolve without antibiotics, yet the condition remains a leading indication for paediatric antibiotic prescriptions worldwide.

Homeopathy occupies an unusual position in this landscape. More than 200 million people use it regularly worldwide, and 29 percent of the EU population reportedly use homeopathic medicines in their day-to-day healthcare. A newly published nationally representative UK survey, conducted as part of ENHANCE and appearing in BMJ Open in January 2026, found that 4.9 percent of the population — an estimated 2.7 million people — used homeopathic products over a 12-month period, while 4.1 percent, around 2.2 million people, consulted a homeopathic practitioner. Overall, 65.9 percent of UK adults reported using some form of traditional, complementary or integrative medicine in the previous year. This is not a marginal subculture; it is a substantial slice of the population whose healthcare behaviour intersects directly with prescribing patterns.

The biological controversy is acknowledged head-on. The mechanism of action of homeopathic medicines remains unresolved, but the programme’s authors point to a body of physicochemical and biological work they argue supports plausibility. A scoping review identified 216 publications proposing mechanisms ranging from complex systems theory to nanostructure models and hypotheses about water organisation. A systematic review of foundational experiments found that 77 percent demonstrated reproducible effects of homeopathic preparations in cell, animal and plant models, and recent studies in neuronal cell lines and agrohomeopathy systems have reported similar findings. Crucially, the authors note, these in vitro and non-human studies exclude placebo effects as confounders, offering context for interpreting clinical results even as the wider debate continues.

The clinical evidence base is where the programme’s work becomes most consequential. Homeopathy has been studied in 708 controlled clinical trials, and a systematic review of meta-analyses covering 182 randomised trials found that five of six meta-analyses showed a statistically significant effect beyond placebo. The most rigorous meta-analysis of individualised homeopathy, encompassing 22 trials, reported that it was 1.5 to 2.0 times more likely to be beneficial than placebo, with stronger effects in higher-quality trials. Safety data are also comparatively favourable, with adverse event rates comparable to placebo and serious adverse events significantly lower than comparable conventional treatments.

More specifically for stewardship, several studies have reported reduced antibiotic use when homeopathy is added to or substituted for conventional care. In acute otitis media, non-randomised and pragmatic randomised trials have found substantially lower antibiotic use in homeopathically treated children alongside comparable or faster symptom resolution. An international pragmatic randomised trial in recurrent tonsillitis found that adjunctive homeopathy reduced acute antibiotic use from 58.2 percent to 37.0 percent, a statistically significant difference. In patients with spinal cord injury suffering recurrent urinary tract infections, classical homeopathy significantly reduced infection frequency with secondary reductions in antibiotic use. At population level, the French EPI3 cohort study found 57 percent lower antibiotic consumption among patients of homeopathic general practitioners compared with conventional practitioners, with comparable clinical outcomes.

Veterinary evidence is more mixed but directionally similar. Four randomised trials of homeopathy for clinical mastitis in dairy cattle produced inconsistent results, with antibiotics superior in pathogen-positive cases but comparable bacteriological cure in culture-negative cases. Herd-level programmes in organic dairy systems that used homeopathy as the principal modality achieved substantial reductions in antibiotic treatments, though these cannot be attributed to homeopathy alone. In swine, one trial found homeopathy superior to low-dose antibiotic metaphylaxis for preventing respiratory disease, and the strongest positive veterinary result came from a study in which homeopathic treatment of sows significantly reduced neonatal E. coli diarrhoea in piglets. A retrospective cohort study of German turkey farms also reported markedly fewer antibiotic-treatment days on homeopathy-oriented farms.

ENHANCE’s own completed work illustrates both the promise and the methodological frustration of this field. Its systematic review of otitis media, published in Heliyon in October 2024, identified nine controlled studies and found that four randomised trials reported statistically significant outcomes favouring homeopathy for symptom scores, middle ear effusion and antibiotic use. Meta-analysis suggested that add-on non-individualised homeopathy reduced filled antibiotic prescriptions by 46 percent, though the pooled result fell short of statistical significance. The review’s most important finding was negative in a different sense: heterogeneity in outcome measures across studies was identified as the critical barrier to evidence synthesis. That diagnosis directly shaped the programme’s next major achievement — the first internationally agreed Core Outcome Set for acute otitis media, published in BMC Primary Care in April 2025. Developed through a four-phase consensus process involving parents, 28 healthcare professionals and an international steering committee, the COS-AOM standardises ten outcomes, including pain severity, fever, antibiotic use, adverse events and recurrence over 12 months, all achieving 100 percent agreement from the steering committee.

A second systematic review, covering tonsillitis and published in the European Journal of Integrative Medicine in April 2026, found five randomised trials with encouraging but heterogeneous signals. In recurrent tonsillitis, both individualised and non-individualised homeopathy were associated with reduced recurrence, lower antibiotic consumption and improved quality of life, with the strongest evidence for a standardised complex remedy called SilAtro-5-90, which showed a 47 percent reduction in recurrence and a 36 percent reduction in antibiotic use in individual trials. A cost-effectiveness analysis found the intervention cost-saving for patients with more than 3.33 previous episodes. No serious adverse events were reported, but GRADE certainty was low across all outcomes and meta-analysis was impossible due to heterogeneity — prompting the launch of a parallel core outcome set project for tonsillitis and, in March 2026, for sinusitis as well.

The UK survey also delivered findings with direct policy implications. People who used traditional and complementary medicine were equally likely to use antibiotics overall and held similar beliefs about antibiotic efficacy for colds, but they were significantly less likely to believe antibiotics can kill viruses — a misconception in the opposite, arguably more dangerous direction — and more likely to believe that unnecessary antibiotic use does not affect antibiotics’ effectiveness. Meanwhile, 57.2 percent of all participants and 66.8 percent of complementary medicine users expressed interest in using homeopathy as a non-antibiotic treatment for common infections. The survey also surfaced an equity concern: professional homeopathic consultation was strongly associated with private health insurance coverage, suggesting that access is currently stratified by income. The programme’s authors argue that any future integration into stewardship pathways must explicitly address this inequality, potentially through NHS-accessible delivery models.

ENHANCE is explicitly situated within One Health frameworks, recognising that the majority of global antimicrobial consumption occurs in food-producing animals and that human, animal and environmental health are interdependent. The programme is connected to the Global Initiative for Traditional Solutions to Antimicrobial Resistance network, which comprises seventeen research institutes and six additional organisations across human and veterinary medicine, and its agenda aligns with the WHO Global Traditional Medicine Strategy 2025–2034 and the Quadripartite One Health Joint Plan of Action 2022–2026. Quarterly scientific monitoring between December 2023 and May 2026 identified 39 peer-reviewed publications on homeopathy and antimicrobial resistance, indicating sustained international research activity.

The programme is candid about its limitations. Stakeholder input into its core outcome sets has drawn predominantly on high-income, Europe- and USA-based clinicians, researchers and patients, even though the underlying reviews included studies from low- and middle-income countries without language restriction. This matters because the burden of antimicrobial resistance falls disproportionately on poorer nations, where traditional medicine practitioners are often key health contacts. Future work will broaden stakeholder input and establish research partnerships in these settings, supporting WHO goals of universal health coverage and equitable access to stewardship.

What ENHANCE has established so far is infrastructure rather than proof: a consistent directional signal favouring antibiotic reduction across diverse settings, a methodological framework of standardised outcomes and pre-registered protocols capable of producing definitive evidence, and a population base large enough to make the question undeniably relevant to policy. The decisive test now lies ahead in adequately powered, pre-registered, double-blind trials with antibiotic use as the primary outcome, planned for acute otitis media, tonsillitis and sinusitis, alongside real-world evidence studies in primary and community care. Whether homeopathy can meaningfully reduce antibiotic use at population level, with symptom control and equitable access, is a question the researchers argue health systems cannot responsibly leave unanswered as the resistance crisis deepens. The scientific community, they note, is entitled to expect that this test is conducted to the highest standards — and ENHANCE, by design, intends to deliver exactly that.

Subject of Research: Evaluation of homeopathy as an antibiotic-sparing strategy within antimicrobial stewardship research

Article Title: ENHANCE: a global collaborative research programme investigating the role of homeopathy in antimicrobial stewardship

Article References: van der Werf, E. (2026). ENHANCE: a global collaborative research programme investigating the role of homeopathy in antimicrobial stewardship. Frontiers in Antibiotics, 5, Article 1892945. https://doi.org/10.3389/frabi.2026.1892945

Image Credits: AI Generated

DOI: 10.3389/frabi.2026.1892945

Keywords: antimicrobial resistance, antimicrobial stewardship, homeopathy, primary care, ENHANCE programme, core outcome sets, acute otitis media, tonsillitis, One Health, traditional and complementary medicine, antibiotic prescribing, randomised controlled trials