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  • Amlodipine Linked to...

Amlodipine Linked to Lower Acute Infection Rates Compared to Ramipril or Bendroflumethiazide: Study

Written By : Dr Riya Dave |Medically Reviewed By : Dr. Kamal Kant Kohli Published On 2025-10-08T08:45:39+05:30  |  Updated On 8 Oct 2025 8:46 AM IST
Amlodipine Linked to Lower Acute Infection Rates Compared to Ramipril or Bendroflumethiazide: Study
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A new study published in the Journal of American Heart Association has revealed that new users of amlodipine for hypertension had lower rates of acute infections compared to those starting ramipril or bendroflumethiazide. The study was conducted by Noah A. and colleagues. The research found that amlodipine was linked with lower rates of acute infections and SARS-CoV-2 infections, and it is proposed that the drug could have other immunomodulatory effects in addition to managing blood pressure.

Functional inhibitors of acid sphingomyelinase (FIASMAs) have been shown to augment human immune function in vitro, and the current research presents population-based evidence to uphold that mechanism in real-world clinical practice. The research sought to contrast the risk of acute infection among amlodipine users with that among users of other first-line antihypertensive drugs, namely ramipril (an ACE inhibitor) and bendroflumethiazide (a thiazide diuretic), and to assess whether the use of amlodipine is related to SARS-CoV-2 infection.

This was a cohort study based on data from the UK Clinical Practice Research Datalink (CPRD) GOLD for 2000–2021. Researchers compared new monousers of amlodipine, ramipril, or bendroflumethiazide who were free from preexisting cardiovascular disease at baseline.

Two comparisons were made in pairs:

  • Amlodipine vs. Ramipril

  • Amlodipine vs. Bendroflumethiazide

Follow-up extended to the duration that patients remained under exposure to their allocated drug. The main outcome was the development of acute outpatient infections (respiratory, genitourinary, gastrointestinal infection, and sepsis). A secondary outcome was diagnosed SARS-CoV-2 infection between 2020–2021. Statistical analysis comprised the estimation of incidence rates (IRs) and incidence rate ratios (IRRs) from negative binomial regression, with adjustment for confounders by means of fine stratification on the propensity score.

Key Findings

  • 121,847 amlodipine vs. 122,096 ramipril and 46,368 amlodipine vs. 153,660 bendroflumethiazide users studied.

Incidence rate (IR) of acute infections:

  • Amlodipine = 38.9/1,000 person-years

  • Bendroflumethiazide = 51.6/1,000 person-years

Weighted IRR for acute infections:

  • Amlodipine vs. Ramipril = 0.77 (95% CI 0.75–0.80)

  • Amlodipine vs. Bendroflumethiazide = 0.78 (95% CI 0.75–0.81)

  • SARS-CoV-2 infection IRR: 0.57 (95% CI 0.48–0.67)

This large cohort study based on populations showed that amlodipine use was associated with significantly reduced risk of acute infections and SARS-CoV-2 infection when compared to ramipril and bendroflumethiazide. These results indicate that amlodipine, in addition to its antihypertensive effect, may have additional immune-protective effects, and thus its value as a first-line treatment for hypertension.

Reference:

Aebi, N., Meier, C. R., Jick, S. S., Lang, U., & Spoendlin, J. (2025). Risk of acute infections in new users of antihypertensive drugs: An observational cohort study. Journal of the American Heart Association, 14(14), e040242. https://doi.org/10.1161/JAHA.124.040242



Journal of American heart associationAmlodipinefunctional inhibitor of acid sphingomyelinaseFIASMAacute infectionsSARS-CoV-2antihypertensive drugscohort studyUK CPRDramiprilbendroflumethiazideimmune functioninfection risk
Source : Journal of American Heart Association
Dr Riya Dave
Dr Riya Dave

    Dr Riya Dave has completed dentistry from Gujarat University in 2022. She is a dentist and accomplished medical and scientific writer known for her commitment to bridging the gap between clinical expertise and accessible healthcare information. She has been actively involved in writing blogs related to health and wellness.

    Dr. Kamal Kant Kohli
    Dr. Kamal Kant Kohli

    Dr Kamal Kant Kohli-MBBS, DTCD- a chest specialist with more than 30 years of practice and a flair for writing clinical articles, Dr Kamal Kant Kohli joined Medical Dialogues as a Chief Editor of Medical News. Besides writing articles, as an editor, he proofreads and verifies all the medical content published on Medical Dialogues including those coming from journals, studies,medical conferences,guidelines etc. Email: drkohli@medicaldialogues.in. Contact no. 011-43720751

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