Effect of Therapeutic Drug Monitoring on Adherence and Blood Pressure: A Multicenter Randomized Clinical Trial
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https://hdl.handle.net/10037/34958Date
2024-01-07Type
Journal articleTidsskriftartikkel
Peer reviewed
Author
Halvorsen, Lene Vernås; Søraas, Camilla Lund; Larstorp, Anne Cecilie Kjeldsen; Hjørnholm, Ulla; Kjær, Vibeke Norheim; Liestøl, Knut; Aune, Arleen; Olsen, Erik; Brobak, Karl Marius; Bergland, Ola Undrum; Rognstad, Stine; Aarskog, Nikolai Ravn; Heimark, Sondre; Fadl Elmula, Fadl Elmula M.; Gerdts, Eva; Mo, Rune; Solbu, Marit Dahl; Opdal, Mimi Stokke; Kjeldsen, Sverre; Rostrup, Morten; Høieggen, AudAbstract
METHODS - Patients were ≥18 years on stable treatment with at least 2 antihypertensive agents. We planned to randomize 80 nonadherent patients with a systolic daytime ambulatory BP ≥135 mm Hg to TDM intervention or not. The control group and the study personnel who measured BP remained uninformed about serum drug measurements throughout. All patients and physicians were blinded for BPs. Lifestyle advice and detailed information on the disease process and the importance of BP treatment were given to both groups.
RESULTS - From 2017 to 2022, we randomized 46 diagnosed nonadherent from a total of 606 patients with uncontrolled HT. The TDM group had a 6.7 (±14.5) mm Hg reduction from 147.9 (±10.3) to 141.1 (±14.1) mm Hg, and the control group experienced a 7.3 (±13.2) mm Hg reduction from 147.1 (±9.2) to 139.1 (±17.4) mm Hg, P = 0.9 between groups. Adherence improved in both groups, 73% in the TDM group and 59% in the control group became adherent at 3 months, P = 0.51.
CONCLUSIONS - In our prospective multicenter clinical trial of uncontrolled and nonadherent hypertensive patients, we found no additional effect of TDM on BP and drug adherence compared with standard care.