Does Hydroxyzine Chloride Raise Blood Pressure?
No, hydroxyzine chloride does not raise blood pressure; in fact, it may lower blood pressure and cause hypotension, particularly in overdose situations. 1
Blood Pressure Effects of Hydroxyzine
Hypotensive Rather Than Hypertensive Effects
Hydroxyzine is associated with hypotension, not hypertension. The FDA drug label specifically states that hypotension may occur with hydroxyzine overdose and should be controlled with intravenous fluids and vasopressors like levarterenol or metaraminol. 1
Critically, epinephrine should NOT be used to treat hydroxyzine-related hypotension because hydroxyzine counteracts epinephrine's pressor (blood pressure-raising) action. 1 This pharmacological interaction confirms that hydroxyzine has blood pressure-lowering properties rather than blood pressure-elevating effects.
Cardiovascular Concerns Are Cardiac Rhythm, Not Blood Pressure
The primary cardiovascular risk with hydroxyzine involves cardiac conduction abnormalities—specifically QT prolongation and potential Torsade de Pointes—rather than blood pressure elevation. 1
Historical data from 1975 noted that hydroxyzine may produce abnormal ventricular repolarization, particularly when combined with other medications affecting cardiac conduction (phenothiazines, tricyclic antidepressants, quinidine, procainamide). 2 These effects relate to cardiac rhythm disturbances, not hypertension.
Clinical Context: Medications That Actually Raise Blood Pressure
Common Blood Pressure-Elevating Medications
For context, medications that genuinely raise blood pressure include:
NSAIDs increase blood pressure by 3-6 mmHg in patients with controlled hypertension and antagonize multiple antihypertensive drug classes. 3
Pseudoephedrine raises systolic blood pressure by approximately 1 mmHg on average (though effects vary individually) through α-adrenergic agonist activity causing systemic vasoconstriction. 4
Sympathomimetic agents like atomoxetine increase blood pressure through norepinephrine reuptake inhibition. 5
Hydroxyzine Is Not Listed Among Blood Pressure-Elevating Agents
Major hypertension guidelines from the American College of Cardiology and American Heart Association comprehensively list medications that elevate blood pressure, including decongestants, NSAIDs, sympathomimetics, and various herbal supplements. 6, 7, 3
Hydroxyzine is notably absent from these lists of blood pressure-elevating medications. 6, 7, 3
Clinical Management Implications
Safe Use in Hypertensive Patients
Hydroxyzine can be used in patients with hypertension without concern for worsening blood pressure control, as it does not possess hypertensive properties. 1
The primary monitoring concern with hydroxyzine should be ECG monitoring for QT prolongation in high-risk patients or overdose situations, not blood pressure elevation. 1
Caution for Hypotension Risk
In patients at risk for orthostatic hypotension (elderly, those on multiple antihypertensive agents, autonomic dysfunction), hydroxyzine's potential hypotensive effects warrant consideration. 1
If hypotension occurs with hydroxyzine, avoid epinephrine for treatment; use alternative vasopressors like levarterenol or metaraminol instead. 1