Why should decongestants containing pseudoephedrine be used with caution in people with high blood pressure?

• A. They can raise blood pressure and heart rate.
• B. They cause drowsiness.
• C. They interfere with sleep.
• D. They are ineffective.

Answer: (A)

Pseudoephedrine works by stimulating the sympathetic nervous system to shrink nasal vessels and relieve congestion. That same stimulation can raise systemic vascular resistance and boost heart rate. In people with high blood pressure, this extra sympathetic activity can worsen blood pressure control and may raise the risk of cardiovascular events. So, decongestants containing pseudoephedrine should be used with caution or avoided unless a clinician approves. It’s not primarily a sedating medication, so drowsiness or sleep disruption aren’t the main concerns, and it is not inherently ineffective when used appropriately.