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Will taking cough medication interfere with the effectiveness of my blood pressure medication?

I am a 20 year old, African American male, with a history of hypertension. I take lisinopril 20mg daily. Apart from a balanced diet, i try to watch my numbers through daily exercise. With the cold weather i have contracted a cold, and was curious as to whether cold medication would be fine.
Certain cough suppressants such as dextromethorphan have the potential to raise your blood pressure. This happens because this drug causes your blood vessels to construct, which is the opposite of what lisinopril does. Because of this, all patients that have issues with blood pressure should ask their primary care physician first before starting the medication. In the vast majority of cases, it is safe to take dextromethorphan for a few days while trying to get over a cold. A better option would be for you to schedule an appointment with your primary care physician so that you can discuss the safety of cold medications and so that other options can be explored. If cough is your primary symptom, then other medications such as guaifenesin may be more appropriate. If your cough continues for more than a week after contracting the cold, then you may need a steroid inhaler to calm down the inflammation in your lungs. If runny nose is your primary symptom, then you may benefit from an ipratropium nasal spray which won't raise your blood pressure. Since some of the options are by prescription only, your doctor will have to see you first. Good luck.
This answer is for general informational purposes only and is not a substitute for professional medical advice.
If you think you may have a medical emergency, call your doctor or (in the United States) 911 immediately. Always seek the advice of your doctor before starting or changing treatment. Medical professionals who provide responses to health-related questions are intended third party beneficiaries with certain rights under Zocdoc’s Terms of Service.

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