Cost Effectiveness Analysis of Candesartan Therapy in Comparison to Candesartan-Amlodipine Therapy on Hypertensive Outpatients

Abstract

BACKGROUND: he achievement of optimal hypertension therapy requires cost-effective medicine. The treatment of hypertensive patients needs for long-term medication have made medical costs a prime issue in health economics.

AIM: This study aims to determine the cost effectiveness of candesartan therapy compared to candesartan-amlodipine therapy on hypertensive outpatients.

METHODS: This is a prospective cohort study that compares candesartan therapy to candesartan-amlodipine therapy at a public hospital from payers’ perspective. The outcome is the percentage of targeted blood pressure decrease after three months of therapy. The cost effectiveness analysis uses the Incremental Cost Effectiveness Ratio (ICER) based on the ratio of cost difference to the outcome in both therapy groups.

RESULTS: As many as 111 patients participated in this research, comprising 40 candesartan therapy patients and 71 patients with the combination of candesartan-amlodipine. Of the participants, 63.96% were female, 57.66% were aged 60 or older, and 56.32% had diabetes mellitus as the most common complication. Results show that the average direct medical cost per patient for a therapy of three months with candesartan was IDR 1,050,536 ± 730,007 and IDR 760,040 ± 614,290 for a candesartan-amlodipine therapy. The mean decline of systolic and diastolic blood pressure under candesartan therapy is less than that of candesartan-amlodipine, although without any significant difference (p > 0.05). It follows that the effectiveness of candesartan (85%) is greater than that of the candesartan-amlodipine combination (84.50%). Candesartan therapy is thereby more cost-effective with an ICER value of IDR 580,993/%.

CONCLUSION: Hypertension therapy by candesartan is more cost-effective than candesartan-amlodipine therapy with a cost addition of IDR 580,993.