Rodgers A, Salam A, Schutte AE, Cushman WC, de Silva HA, Di Tanna GL, Grobbee DE, Narkiewicz K, Ojji DB, Poulter NR, Schlaich MP, Oparil S, Spiering W, Williams B, Wright JT Jr, Lakshman P, Uluwattage W, Hay P, Pereira T, Amarasena N, Ranasinghe G, Gianacas C, Shanthakumar M, Liu X, Wang N, Gnanenthiran SR, and Whelton PK
Background: Single-pill combinations (SPCs) of three low-dose antihypertensive drugs can improve hypertension control but are not widely available. A key issue for any combination product is the contribution of each component to efficacy and tolerability. This trial compared a new triple SPC called GMRx2, containing telmisartan, amlodipine, and indapamide, with dual combinations of components for efficacy and safety., Methods: In this international, randomised, double-blind, active-controlled trial, we enrolled adults with hypertension receiving between zero and three antihypertensive drugs, with a screening systolic blood pressure (SBP) ranging from 140-179 mm Hg (on no drugs) to 110-150 mm Hg (on three drugs). Participants were recruited from Australia, the Czech Republic, New Zealand, Poland, Sri Lanka, the UK, and the USA. In a 4-week active run-in, existing medications were switched to GMRx2 half dose (telmisartan 20 mg, amlodipine 2·5 mg, and indapamide 1·25 mg). Participants were then randomly allocated (2:1:1:1) to continued GMRx2 half dose or to each possible dual combination of components at half doses (telmisartan 20 mg with amlodipine 2·5 mg, telmisartan 20 mg with indapamide 1·25 mg, or amlodipine 2·5 mg with indapamide 1·25 mg). At week 6, doses were doubled in all groups, unless there was a clinical contraindication. The primary efficacy outcome was mean change in home SBP from baseline to week 12, and the primary safety outcome was withdrawal of treatment due to an adverse event from baseline to week 12. Secondary efficacy outcomes included differences in clinic and home blood pressure levels and control rates. This study is registered with ClinicalTrials.gov, NCT04518293, and is completed., Findings: The trial was conducted between July 9, 2021 and Sept 1, 2023. We randomly allocated 1385 participants to four groups: 551 to GMRx2, 276 to telmisartan-indapamide, 282 to telmisartan-amlodipine, and 276 to amlodipine-indapamide groups. The mean age was 59 years (SD 11), 712 (51%) participants self-reported as female and 673 (48·6%) male, and the mean clinic blood pressure at the screening visit was 142/85 mm Hg when taking an average of 1·6 blood pressure medications. Following the run-in on GMRx2 half dose, the mean clinic blood pressure level at randomisation was 133/81 mm Hg and the mean home blood pressure level was 129/78 mm Hg. At week 12, the mean home SBP was 126 mm Hg in the GMRx2 group, which was lower than for each of the dual combinations: -2·5 (95% CI -3·7 to -1·3, p<0·0001) versus telmisartan-indapamide, -5·4 (-6·8 to -4·1, p<0·0001) versus telmisartan-amlodipine, and -4·4 (-5·8 to -3·1, p<0·0001) versus amlodipine-indapamide. For the same comparisons, differences in clinic blood pressure at week 12 were 4·3/3·5 mm Hg, 5·6/3·7 mm Hg, and 6·3/4·5 mm Hg (all p<0·001). Clinic blood pressure control rate below 140/90 mm Hg at week 12 was superior with GMRx2 (74%) to with each dual combination (range 53-61%). Withdrawal of treatment due to adverse events occurred in 11 (2%) participants in the GMRx2 group, four (1%) in telmisartan-indapamide, three (1%) in telmisartan-amlodipine, and four (1%) in amlodipine-indapamide, with none of the differences being statistically significant., Interpretation: A novel low-dose SPC product of telmisartan, amlodipine, and indapamide provided clinically meaningful improvements in blood pressure reduction compared with dual combinations and was well tolerated. This SPC provides a new therapeutic option for the management of hypertension and its use could result in a substantial improvement in blood pressure control in clinical practice., Funding: George Medicines., Competing Interests: Declaration of interests AR, AS, AES, CG, MS, XL, and NW are employed at The George Institute for Global Health (TGI), which holds an interest in George Medicines via its social enterprise arm, George Institute Ventures. None of the TGI staff has a personal financial interest in George Medicines. AR is seconded part-time to George Medicines. TGI holds patents for ultra-low-dose, fixed-dose combination products for the treatment of hypertension and diabetes, and AR is listed as one of the inventors (granted: US 10 369 156, US 10 799 487, US 10 322 117, US 11 033 544, US 11 478 462; pending: US 17/932 982, US 18/446 268, US 17/598 122, US 17/317 614, US 17/527 084, US 17/527 085, US 17/527 087). AR does not have a financial interest in these patents. None of the other authors has a financial interest in George Medicines or has received funding for their independent contribution to the GMRx2 programme. AR reports consulting fees as a data and safety monitoring board member for Idorsia; and a fellowship grant from the National Health and Medical Research Council of Australia (GNT 1160743). AES reports consulting fees or speaker honoraria from OMRON Healthcare, Aktiia, Medtronic, Servier, Abbott, Sanofi, Sun Pharmaceuticals, Novartis, and Skylabs; being co-chair of the National Hypertension Taskforce Australia; being a board member for Hypertension Australia and the Australian Cardiovascular Alliance; and an investigator grant from the National Health and Medical Research Council of Australia (GNT 2017504). DBO reports speaker honoraria from Novartis, AstraZeneca, Servier, Swipha, and Boehringer Ingelheim for speaking at educational meetings. KN reports speaker and consulting honoraria from Bausch Health, Berlin-Chemie/Menarini, Egis, Idorsia, Janssen, Gedeon Richter, Gilead, Krka, Novo Nordisk, Polpharma, Recordati, Sandoz, and Servier; and honoraria from or participation on advisory boards for Polpharma and Zentiva. MPS reports consulting fees or travel and research support from Medtronic, Abbott, Recor, Novartis, Servier, Pfizer, and Boehringer Ingelheim; and being current President of Hypertension Australia and Treasurer of the World Hypertension League. WCC reports institutional grants from Recor and George Medicines; and consulting fees from Alnylam Pharmaceuticals. NRP reports consultancy fees from Servier and Aktiia; support for research projects and staff from Servier and Pfizer; support for arranging and speaking at educational meetings from AstraZeneca, LRI-Therapharma, Napi, Servier, Sanofi, EVA Pharma, Pfizer, Emcure, Dr Reddy's Laboratories, and Zydus; and support by the National Institute for Health Research Senior Investigator Awards, Biomedical Research Centre funding, and the British Heart Foundation Research Centre Excellence Award. DEG reports funding to his department as part of the EU Horizon Hypermarker project. BW reports trial steering committee appointments for Novartis and AstraZeneca; lecture fees for Servier and Novartis; and an unremunerated role as President of the International Society of Hypertension. JTW reports institutional grants from the National Institutes of Health, the Ohio Department of Medicaid, and the Agency for Healthcare Research and Quality; travel support and participation on an advisory board for Medtronic; being chair of the data safety monitoring board for the IMPACTS MIND Trial at Tulane University; and being on the Northeast Ohio Neighbourhood Health Center Community Board of Directors. All other authors declare no competing interests., (Copyright © 2024 Elsevier Ltd. All rights reserved, including those for text and data mining, AI training, and similar technologies.)