AI Article Synopsis
- Over 50% of patients with treatment-resistant hypertension are not adhering to their prescribed medications, as shown by urine drug tests using LC-MS/MS.
- The study involved analyzing data from 300 patients across nine UK hypertension centers, identifying demographic factors such as younger age, female sex, and high medication burden as key influences on nonadherence.
- Findings indicate that addressing the number of prescribed medications may improve adherence rates in patients managing hypertension.
Article Abstract
Objective: Nonadherence to medication is present in at least 50% of patients with apparent treatment-resistant hypertension. We examined the factors associated with nonadherence as detected by a liquid chromatography-tandem mass spectrometry (LC-MS/MS)-based urine antihypertensive drug assay.
Methods: All urine antihypertensive test results, carried out for uncontrolled hypertension (BP persistently >140/90 mmHg) between January 2015 and December 2016 at a single toxicology laboratory were analysed. Drugs detected were compared with the antihypertensive drugs prescribed. Patients were classified as adherent (all drugs detected), partially nonadherent (at least one prescribed drug detected) or completely nonadherent (no drugs detected). Demographic and clinical parameters were compared between the adherent and nonadherent groups. Binary logistic regression analysis was performed to determine association between nonadherence and demographic and clinical factors.
Results: Data on 300 patients from nine hypertension centres across the United Kingdom were analysed. The median age was 59 years, 47% women, 71% Caucasian, median clinic BP was 176/95 mmHg and the median number of antihypertensive drugs prescribed was four. One hundred and sixty-six (55%) were nonadherent to prescribed medication with 20% of these being completely nonadherent. Nonadherence to antihypertensive medication was independently associated with younger age, female sex, number of antihypertensive drugs prescribed, total number of all medications prescribed (total pill burden) and prescription of a calcium channel blocker.
Conclusion: This LC-MS/MS urine analysis-based study suggests the majority of patients with apparent treatment-resistant hypertension are nonadherent to prescribed treatment. Factors that are associated with nonadherence, particularly pill burden, should be taken into account while treating these patients.
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| http://dx.doi.org/10.1097/HJH.0000000000002398 | DOI Listing |
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