Use of single pill anti-hypertensive combination medications in Cardiology Clinic of a Tertiary Health Institution in Nigeria
Background: Majority of patients with hypertension require 2 or more medications to provide adequate blood pressure (BP) control. In addition, contemporary guidelines on the management of hypertension favor the use of single-pill combinations (SPCs) as they simplify the treatment regimen and decrease the daily pill burden for patients, both of which are associated with improved adherence. In spite of this, there is a lack of data in sub-Saharan Africa on the frequency of use of SPC anti-hypertensive medications.
Method: We prospectively collected detailed clinical data from 373 patients with primary diagnosis of hypertension attending the cardiology clinic of University of Abuja Teaching Hospital between 2016 and 2017.
Results: Three hundred and seventy three patients with mean age of 50.6 ± 12.3 years and mean body mass index of 31.2 ± 6.5kg/m2 on anti-hypertensive treatment were evaluated. Baseline mean systolic and diastolic BPs were 161.1 ± 3.1mmHg and 95.4 ± 15.6mmHg respectively, while the mean pulse pressure was 56.6 ± 18.1mmHg. 212 (56.8%) where on SPCs, with 32.5% on angiotensin receptor blockers (ARBs) plus hydrochlorothiazide (HCTZ), 18.9% on angiotensin converting enzyme inhibitors (ACEIs) plus HCTZ, 9.9% on amlodipine (AML) plus ARB, 3.3% on AML plus ACEI, 3.8% on thiazide-like diuretic plus atenolol, 29.2% on HCTZ plus amiloride, and 2.4% on triple combination of AML+ARB+HCTZ.
Conclusion: Our study has shown that over 50% of our patients were on SPC anti-hypertensive medications, with the most prescribed single pill combination being angiotensin receptor blocker plus thiazide diuretic.
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