Cough Syrups and Hypertension Management

Primary Agents of Concern

The American College of Cardiology recommends avoiding cough syrups containing sympathomimetic decongestants, such as pseudoephedrine and phenylephrine, in patients with hypertension, particularly those with uncontrolled hypertension 1, 2
Pseudoephedrine is the most problematic agent, as it stimulates both alpha and beta-adrenergic receptors, causing systemic vasoconstriction that increases systolic blood pressure by approximately 1 mmHg and heart rate by 2.83 beats/minute 3

The American College of Cardiology guidelines explicitly recommend using decongestants for the shortest duration possible and avoiding them in severe or uncontrolled hypertension 2
For patients with controlled hypertension, pseudoephedrine may be used cautiously with close monitoring, and topical nasal decongestants, such as oxymetazoline, are preferred for short-term use 3
For patients with uncontrolled or severe hypertension, both oral and topical decongestants should be avoided if possible, and alternative therapies, such as nasal saline irrigation, intranasal corticosteroids, or antihistamines, should be considered 2, 3

Patients with cardiovascular disease, arrhythmias, coronary artery disease, cerebrovascular disease, or elderly patients should use extra caution with both oral and topical decongestants, and topical oxymetazoline for very short-term use is generally safer than oral pseudoephedrine 2, 3

The International Society of Hypertension guidelines list sympathomimetics, including pseudoephedrine, as drug exacerbators of hypertension that should be screened for in all hypertensive patients 1
The risk of adverse cardiovascular events increases with duration of use, underlying cardiovascular disease burden, and baseline blood pressure control 1, 2

Antihistamines, intranasal corticosteroids, guaifenesin, and nasal saline irrigation are safer alternatives for patients with hypertension, as they do not raise blood pressure or have significant cardiovascular effects 2