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Decongestants such as pseudoephedrine and phenylephrine work partly by narrowing blood vessels.
That can relieve nasal congestion—but narrowed blood vessels can also cause blood pressure to rise. Mayo Clinic
Mayo Clinic advises people with severe or uncontrolled hypertension not to take decongestants without appropriate medical guidance. Mayo Clinic
Always read the ingredients in multi-symptom cold and flu products because a decongestant may be included even when it isn’t obvious from the front of the package.
- check.
- Certain Antidepressants
Some antidepressants can increase blood pressure in certain people.
Mayo Clinic
