GLP-1薬と急性視力障害リスクとの関連を解析(Researchers Find Small Increased Risk of Sudden Vision Loss Associated With GLP-1 Medications)

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2026-07-14 ラトガース大学

ラトガース大学の研究チームは、2型糖尿病や肥満の治療に広く用いられるGLP-1受容体作動薬と、突然の視力低下を引き起こすまれな眼疾患「虚血性視神経症(ischemic optic neuropathy)」との関連を調査した。その結果、GLP-1受容体作動薬を使用した患者では、この疾患の発症リスクがわずかに高いことが示された。ただし、増加するリスクは18か月間で患者1万人当たり約3~4例程度と小さく、絶対的な発症率は極めて低いことが確認された。研究者らは、GLP-1製剤は血糖管理や体重減少に加え、心血管・腎疾患リスクを低減するなど多くの利益を有しており、今回の結果だけで服薬を中止すべきではないと強調している。一方で、利用者の急増を踏まえ、医師と患者が潜在的なリスクを理解した上で治療を選択し、突然の視力低下などの症状が現れた場合には速やかに眼科を受診することが重要であるとしている。

GLP-1薬と急性視力障害リスクとの関連を解析(Researchers Find Small Increased Risk of Sudden Vision Loss Associated With GLP-1 Medications)

<関連情報>

グルカゴン様ペプチド-1受容体作動薬と虚血性視神経症のリスク:ターゲット試験のエミュレーション Glucagon-Like Peptide-1 Receptor Agonists and Risk for Ischemic Optic Neuropathy: A Target Trial Emulation

Kamika R. Reynolds, MS, PhD, Kimberly M. O’Malley, MS, Jason A. Roy, PhD, and Chintan V. Dave, PharmD, PhD
Annals of Internal Medicine
DOI:https://doi.org/10.7326/ANNALS-25-00860

Abstract

Background:
There are few data evaluating the association between glucagon-like peptide-1 receptor agonists (GLP-1RAs) and nonarteritic anterior ischemic optic neuropathy (NAION), which constitutes approximately 75% of ischemic optic neuropathy (ION) cases in adults.

Objective:
To estimate the effect of GLP-1RAs versus sodium–glucose cotransporter-2 inhibitors (SGLT2is) and dipeptidyl peptidase-4 inhibitors (DPP4is) on risk for ION.

Design:
Observational emulation of a target trial.

Setting:
Large U.S.-based commercial claims database (January 2017 to December 2022).

Participants:
Patients aged 18 to 65 years with type 2 diabetes initiating a GLP-1RA, an SGLT2i, or a DPP4i.

Measurements:
The primary outcome was incident ION as a proxy for NAION. Analyses adjusted for more than 80 covariates using inverse probability of treatment weights, and 18-month cumulative incidence and risk differences (RDs) per 10 000 patients were estimated.

Results:
The 18-month risk for ION was 8.5 versus 5.5 per 10 000 among GLP-1RA users versus SGLT2i users (RD, 3.0 [95% CI, 0.4 to 5.7]) and 7.8 versus 4.2 per 10 000 among GLP-1RA users versus DPP4i users (RD, 3.6 [CI, 1.1 to 6.1]). Corresponding numbers needed to harm were 3333 and 2778, respectively. Among GLP-1RA users, 69 (85.2%) of the 81 ION events occurred in persons older than 50 years and 57 (70.3%) occurred in men. Risk differences were attenuated among metformin monotherapy users (2.0 and 4.1) compared with users of 2 or more diabetes medications (5.7 and 4.0) versus SGLT2is and DPP4is, respectively. Risk differences were higher in men, patients aged 50 years or older, and those with cardiovascular disease or ophthalmic conditions, with minimal differences in women and those younger than 50 years.

Limitations:
Diagnostic codes specifically for NAION were lacking. Missing data on key clinical factors (such as body mass index and type 2 diabetes duration) may contribute to residual confounding, leaving uncertainty about whether the observed association is causal.

Conclusion:
Use of GLP-1RAs was associated with higher 18-month risk for ION than use of SGLT2is and DPP4is, although absolute risk remained very low. Observed differences may reflect residual confounding.

Primary Funding Source:
National Institutes of Health.

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