The uses and expenses of antihypertensive medications among hypertensive adults.

BACKGROUND

The literature lacks information about the use and cost of prescribed antihypertensive medications, especially by the type and class of medication prescribed.

OBJECTIVE

This study investigated the uses and expenses of antihypertensive medications among hypertensive adults in the United States.

METHODS

Using the 2014-2015 Medical Expenditure Panel Survey data, adult men and nonpregnant women aged 18 or older who had a diagnosis code of hypertension and used any prescribed antihypertensive medication were included in the study (n = 10,971). Adults with hypertension who were using a single antihypertensive medication were defined as single medication users, and those using two or more medications were defined as multiple medication users. Medications were classified into angiotensin-converting-enzyme inhibitors (ACEIs), angiotensin receptor blockers (ARBs), calcium channel blockers (CCBs), thiazide-type diuretics (TDs), β-blockers (BBs), and others. The average annual total antihypertensive medication expenses and the expenditures of each medication class were estimated by using generalized linear models with a log link and gamma distribution and were adjusted to 2015 US dollars.

RESULTS

Among 10,971 hypertensive adults, 4759 (44.1%) were single medication users, and 6212 (55.9%) were multiple medication users. The average annual total cost for antihypertensive medications was $336 per person (95% confidence interval [CI] = $319-$353); $199 (95% CI = $177-$221) for single medication users and $436 (95% CI = $413-$459) for multiple medication users. The average annual costs for each medication class were estimated at $438 (95% CI = $384-$492) for ARBs and $49 for TDs (95% CI = $44-$55).

CONCLUSIONS

Users of multiple medications incurred more than twice the expense than single medication users. When comparing classes of medications, the cost for ARBs was the highest, whereas the cost for TDs was the lowest. This information can be used in evaluating the cost-effectiveness of antihypertension therapies.