Initial Antihypertensive Medication Selection in Asthma
Initial antihypertensive drug therapy for most adults should use a first-line agent from thiazide-type diuretics, ACE inhibitors, ARBs, or calcium channel blockers (Class I, Level of Evidence ASR) [1]. For a patient with asthma, nonselective beta blockers should be avoided because they can worsen bronchospasm [2]. The most appropriate single medication choice for uncomplicated hypertension in asthma is therefore a first-line agent other than a nonselective beta blocker, such as a thiazide-type diuretic [1], [2].
Medication Selection Algorithm
First-line options for initiation of antihypertensive drug therapy include the following classes [1]:
- Thiazide-type diuretics (including hydrochlorothiazide and chlorthalidone) [1]
- Calcium channel blockers (CCBs), including dihydropyridines (e.g., amlodipine) [1]
- ACE inhibitors (e.g., lisinopril) [1]
- ARBs (e.g., losartan) [1]
Beta blockers are not first-line for uncomplicated hypertension without a compelling indication [1]. Nonselective beta blockers should be avoided in asthma [2].
Monotherapy Versus Combination Therapy
- Stage 2 hypertension should be treated initially with 2 first-line agents from different classes (Class I, Level of Evidence C-EO) [1].
- Stage 1 hypertension can be treated initially with a single first-line agent with titration and sequential addition of other agents to reach the BP target (Class IIa, Level of Evidence C-EO) [1].
Initiation Thresholds and Indications
- Treatment initiation is recommended for adults with confirmed stage 1 hypertension who have an estimated 10-year ASCVD risk of 10% or higher, using a combination of nonpharmacological and antihypertensive drug therapy with repeat BP evaluation in 1 month [1].
- Prompt evaluation followed by antihypertensive drug treatment is recommended for very high average BP (e.g., SBP ≥180 mm Hg or DBP ≥110 mm Hg) [1].
Target Blood Pressure Goals
- For adults with confirmed hypertension and known CVD or a 10-year ASCVD event risk of 10% or higher, a BP target of <130/80 mm Hg is recommended (Class I, Level of Evidence B-RSR) [1].
- For adults with confirmed hypertension without additional markers of increased CVD risk, a BP target of <130/80 mm Hg may be reasonable (Class IIb, Level of Evidence C-EO) [1].
Common Pitfalls to Avoid
Nonselective beta blockers should be avoided in asthma due to risk of bronchospasm [2].
Practical Medication Choice for This Clinical Scenario
A first-line non–beta-blocker antihypertensive is appropriate for asthma when no compelling beta-blocker indication exists [1], [2]. A thiazide-type diuretic is an appropriate first-line single-agent choice (e.g., hydrochlorothiazide or chlorthalidone) [1].