What are some common barriers to adherence to antihypertensive therapy?

B is the most relevant choice as common barriers to adherence to antihypertensive therapy often include side effects and the complexity of dosing regimens. Many patients may experience side effects from their medications, such as dizziness, fatigue, or gastrointestinal issues, which can discourage them from continuing treatment. Additionally, if a medication regimen requires taking multiple pills at different times of the day, it can be overwhelming for patients, leading to confusion and missed doses. This complexity can make patients less likely to adhere to their prescribed therapy.

Other barriers like lack of availability and high cost of medications can also impact adherence, but they tend to vary based on individual circumstances and healthcare systems. In contrast, side effects and complex dosing are more universally recognized as significant factors that directly affect a patient's day-to-day decision to continue their treatment for hypertension. Short treatment duration is generally not a barrier for antihypertensive therapy since hypertension is a chronic condition that typically requires ongoing management rather than a temporary regimen.