Are Changes in Your Blood Pressure a Side Effect of Medicine?

Are Changes in Your Blood Pressure a Side Effect of Medicine?
Are Changes in Your Blood Pressure a Side Effect of Medicine?
Emma Yasinski
Emma Yasinski Staff Writer

High blood pressure is often called a “silent killer,” because, unless you’re having changes in your blood pressure measured regularly, you probably won’t know you have it. It is critical to make sure you don’t have high blood pressure, because it raises your risk for heart attack and stroke. 

Nearly half of all US adults have high blood pressure To counter this  trend, health professionals often advise us to eat healthier and exercise more frequently. Sometimes, though, high blood pressure has little to do with our habits and more to do with the prescription pad. Changes in blood pressure—both higher and lower—can be a side effect of extremely common medications like Advil and Motrin (ibuprofen) and antidepressants.

Common Culprits

Many drugs alter blood pressure, whether or not they’re designed to do so. One class of drugs that raise blood pressure is ACE (angiotensin-converting enzyme) inhibitors. Here are some of the other most common culprits.

drugs that can raise or lower blood pressure 

These Can Raise Blood Pressure

  • Decongestants
  • Caffeine
  • Corticosteroids
  • Oral contraceptives
  • Serotonin norepinephrine reuptake inhibitors (SNRIs)

These Can Lower Blood Pressure

  • Diuretics
  • Opioids
  • Drugs for Parkinson’s disease, such as Mirapex (pramipexole) or those containing L-Dopa (levodopa)

These Can Either Raise or Lower Blood Pressure

  • Alcohol
  • Monoamine oxidase inhibitors (MAOIs) for depression
  • Selective serotonin reuptake inhibitors (SSRIs)


Depression increases the risk for cardiovascular disease. The neurotransmitters in our brain that fuel our energy levels, moods and motivation have roles all over our bodies. They circulate throughout our bodies and can interact with our blood vessels and organs. While it’s not a frequent side effect, many of these drugs can also mess with your blood pressure in either direction.

There are four main categories of antidepressants, and all of them can alter your blood pressure. They are monoamine oxidase inhibitors (MAOIs), such as Marplan (isocarboxazid) and Nardil (phenelzine) and selective serotonin reuptake inhibitors (SSRIs), such as Prozac (fluoxetine) and Zoloft (sertraline), can actually raise or lower your blood pressure. Some serotonin norepinephrine reuptake inhibitors (SNRIs), such as Effexor XR (venlafaxine) and Cymbalta (duloxetine) can cause dangerously high blood pressure. Tricyclic antidepressants, such as Tofranil (imipramine) and Pamelor (nortriptyline) are more likely to lower your blood pressure, but can raise it as well.

The SNRI venlafaxine is one of the most likely to lead to dangerous spikes in blood pressure and should not be prescribed for those at high risk. While most SSNRIs are tied to increased blood pressure, one drug in this category, Edronax (reboxetine), has been linked to both heightened and reduced blood pressure.


Caffeine is a known stimulant that can raise your blood pressure for about three to four hours after you consume it.


Corticosteroids, such as Delticot (prednisone), are often prescribed for inflammatory diseases like rheumatoid arthritis. They bring about myriad side effects, including an increase in fluid retention, which can raise blood pressure.


Decongestants like Afrin (oxymetazoline) or Sudafed (phenylephrine) work by constricting your blood vessels to reduce swelling that causes congestion. At the same time, narrower blood vessels carrying the same amount of blood will increase blood pressure.


Ingesting one dose of NSAIDS is unlikely to increase your blood pressure. Taken regularly over time, they may cause your body to hold on to water and sodium, which can increase your blood pressure and stress your kidneys. 


For patients with Parkinson’s disease, low blood pressure, especially when going from sitting to standing, can be both a symptom of the disease or a side effect of such treatments as Inbrijia (levodopa).

What’s a Healthy Blood Pressure?

Your healthcare provider measures your blood pressure during regular appointments, but you can also measure it on your own at home. Blood pressure is a ratio of two numbers: the top number, your systolic pressure, is the highest force your blood exerts on the walls of your arteries during a single heartbeat; the bottom number, diastolic pressure, is the lowest amount of force. A healthy blood pressure is 120/80 mmHg (millimeters of mercury), meaning systolic pressure of less than 120 and diastolic pressure of less than 80. 

Because changes in blood pressure aren’t always as easy to notice as more common side effects like nausea, it’s crucial to keep a close watch and regularly monitor your blood pressure, especially if you’re at risk. “There are many medications, both prescription and over-the-counter, that can cause either high or low blood pressure,” says Kelly Johnson-Arbor, MD, co-medical director of the National Capital Poison Center. She emphasizes that many drugs, supplements and conditions can alter your blood pressure when they interact with each other. After taking medication,  it’s crucial to contact your physician if you notice any symptoms. She adds: “You can always contact poison control by clicking on www.poison.org or by calling 1-800-222-1222, if you notice unwanted or strange symptoms after taking medications or supplements.” 

DISCLAIMER: MedShadow provides information and resources related to medications, their effects, and potential side effects. However, it is important to note that we are not a substitute for professional medical advice, diagnosis, or treatment. The content on our site is intended for educational and informational purposes only. Individuals dealing with medical conditions or symptoms should seek guidance from a licensed healthcare professional, such as a physician or pharmacist, who can provide personalized medical advice tailored to their specific circumstances.

While we strive to ensure the accuracy and reliability of the information presented on MedShadow, we cannot guarantee its completeness or suitability for any particular individual's medical needs. Therefore, we strongly encourage users to consult with qualified healthcare professionals regarding any health-related concerns or decisions. By accessing and using MedShadow, you acknowledge and agree that the information provided on the site is not a substitute for professional medical advice and that you should always consult with a qualified healthcare provider for any medical concerns.

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