Chronic Pain Raises Risk of High Blood Pressure

By Pat Anson

Having untreated or poorly treated chronic pain is known to raise the risk of serious health problems, including high cholesterol, elevated pulse, arteriosclerosis, and heart attack..

So it should come as no surprise that chronic pain also increases the risk of high blood pressure, according to a new study by the American Heart Association, which found that the extent and location of the pain may determine the level of risk. 

Someone with chronic widespread body pain, for example, has a 74% higher risk of developing high blood pressure; while chronic headaches are associated with a 22% higher risk and chronic back pain has a 16% higher risk.

“The more widespread their pain, the higher their risk of developing high blood pressure,” said Jill Pell, MD, Professor of Public Health at the University of Glasgow in the UK and lead author of the study published in the journal Hypertension.

“Part of the explanation for this finding was that having chronic pain made people more likely to have depression, and then having depression made people more likely to develop high blood pressure. This suggests that early detection and treatment of depression, among people with pain, may help to reduce their risk of developing high blood pressure.”

Pell and her colleagues analyzed over 13 years of health data from more than 200,000 adults enrolled in the UK Biobank Project. Participants completed a baseline questionnaire that asked if they had experienced pain in the last month that interfered with their usual activities. 

They also noted if the pain was in their head, face, neck/shoulder, back, stomach/abdomen, hip, knee, or all over their body. If they reported pain, they indicated whether pain persisted for more than three months.

Depression was measured based on participants’ responses to questions about the frequency of a depressed mood, disinterest in activities, restlessness or lethargy. Inflammation was measured with blood tests for C-reactive protein (CRP).

At the end of the study period, nearly 10% of all participants developed high blood pressure, which is considered a blood pressure measurement higher than 130/80 mm Hg or 140/90 mm Hg.

Compared to people with no pain, people with short-term acute pain had a 10% greater risk of high blood pressure, while those with chronic localized pain had a 20% higher risk.

When comparing sites of pain, there was a wide variation in risk levels:

• 74% higher risk for chronic widespread pain

• 43% higher risk for chronic abdominal pain

• 22% higher risk for chronic headaches

• 19% higher risk for chronic neck or shoulder pain

• 17% higher risk for chronic hip pain

• 16% higher risk for chronic back pain

Depression and inflammation accounted for 11.7% of the association between chronic pain and high blood pressure.

The findings highlight the need for good pain management to prevent or reduce the risk of hypertension and other health problems.

“When providing care for people with pain, health care workers need to be aware that they are at higher risk of developing high blood pressure, either directly or via depression. Recognizing pain could help detect and treat these additional conditions early,” Pell said.

Pain Relievers Can Cause High Blood Pressure

Another consideration is the need for further studies on the role of pain medicine in high blood pressure. Ibuprofen and other nonsteroidal anti-inflammatory drugs (NSAIDs) may increase blood pressure and worsen pre-existing hypertension. They can also interfere with the effectiveness of some blood pressure medications. 

The effect is more pronounced with some NSAIDs over others. Aspirin, for example, appears to have less effect on blood pressure than naproxen, which can cause the body to retain salt and water, leading to fluid buildup and hypertension. 

Opioids can cause both low and high blood pressure, depending on the dose and duration of use. Sudden discontinuation of long-term opioid use is associated with increased blood pressure

“Chronic pain needs to be managed within the context of the patients’ blood pressure, especially in consideration of the use of pain medication that may adversely affect blood pressure,” said Daniel Jones, MD, Dean and Professor Emeritus at the University of Mississippi School of Medicine.

One limitation of the study is that participants were middle- and older-aged adults who were mainly white and of British origin – therefore the findings may not apply to people from other racial or ethnic groups, or who live in other countries.

Other contributing factors is that participants reporting pain were more likely to be women, have an unhealthy lifestyle, larger waists, higher body mass index (BMI), more long-term health problems, and live in areas with higher unemployment, lower home and car ownership, and more overcrowding.

Opioid Tapering Disrupts Healthcare and Worsens Doctor-Patient Relationships

By Pat Anson, PNN Editor

Tapering patients on long-term opioid therapy results in more emergency department visits and hospitalizations, according to a large new study that found reduced opioid use was particularly disruptive to the healthcare of pain patients with diabetes and high blood pressure.

The study by researchers at University of California Davis is the latest to document the “unintended negative consequences” of policies that limit opioid prescribing. A previous study by the same research team found that tapering raises the risk of an overdose and mental health crisis.

In their latest study, UC Davis researchers analyzed health data for over 113,000 patients who were on opioid therapy for at least 12 months, comparing those who were not tapered to those who had their dose reduced by 15% or more.

Their findings, published in JAMA Network Open, showed that tapering significantly increased hospitalizations and ED visits, while at the same time reducing the number of primary care (PC) visits. Researchers think the latter is at least partially due to “ruptures in relationships” with primary care providers (PCPs) due to patient dissatisfaction with tapering.

Opioid tapering was also associated with a significant reduction in patients taking medication for hypertension or diabetes – even though their blood pressure and blood sugar levels rose when their opioid doses were reduced.

“Tapering may be associated with reduced medication adherence due to an increased patient focus on managing pain and psychological distress due to the taper, disruption in PC due to more frequent ED visits and hospitalizations, or fracture of the PCP-patient relationship,” wrote lead author Elizabeth Magnan, MD, a family medicine physician at UC Davis Medical Center.

“Although cautious interpretation is warranted, these outcomes may represent unintended negative consequences of opioid tapering in patients who were prescribed previously stable doses.” 

Opioid prescribing has fallen dramatically in the U.S. over the past decade, particularly after the release of the CDC’s 2016 opioid guideline. Although millions of patients were affected by the guideline’s recommendations, few efforts were made at the federal level to see what happened to patients who had their opioid doses reduced or even stopped.

A recent study found the number of cancer patients seeking treatment for pain in emergency departments has doubled. Of the 35 million ED visits made by cancer patients, over half were deemed preventable – meaning the visits could have been avoided if the patient has received proper care earlier.

Cannabis Reduces Blood Pressure in Older Adults

By Pat Anson, PNN Editor

Medical cannabis is being used to treat dozens of health conditions, from chronic pain, muscle spasms and nausea to hepatitis, HIV and glaucoma.  Now we’re learning that cannabis may also be a useful treatment for high blood pressure.

A small study conducted by researchers at Ben-Gurion University of the Negev (BGU) in Israel found that cannabis significantly reduces systolic and diastolic blood pressure in older adults with hypertension. The study, recently published in the European Journal of Internal Medicine, is believed to be the first to document the cardiovascular benefits of cannabis.

“Older adults are the fastest growing group of medical cannabis users, yet evidence on cardiovascular safety for this population is scarce,” said lead author Dr. Ran Abuhasira of BGU and Soroka University’s Cannabis Clinical Research Institute. "This study is part of our ongoing effort to provide clinical research on the actual physiological effects of cannabis over time."

Twenty-six patients aged 60 and older either smoked cannabis or ingested it through oils, while their blood pressure, heart rate, and body measurements were monitored.  After three months of cannabis therapy, their mean 24-hour systolic and diastolic blood pressures were reduced by 5.0 mmHg and 4.5 mmHg, respectively. Blood pressure was lowest three hours after ingesting cannabis and at night.

Researchers believe that pain relief, the primary reason most patients use medical cannabis, may have contributed to lowered blood pressure.

Previous studies by BGU researchers found that cannabis significantly reduced pain in older adults living with cancer, Parkinson's disease, post-traumatic stress disorder, ulcerative colitis, Crohn's disease, multiple sclerosis and other chronic conditions. Most patients also said their quality of life improved.

A growing number of seniors are discovering the medical benefits of cannabis. A recent survey of patients at a geriatric clinic in Southern California found that over half were using cannabis on a daily or weekly basis, usually to treat pain, difficulty sleeping, anxiety and depression. Although medical marijuana has been legal in California since 1996, nearly two-thirds of those surveyed said they used cannabis for the first time as older adults.

Painkillers Raise Risk of Obesity and Hypertension

By Pat Anson, Editor

Commonly prescribed painkillers such as opioids and gabapentinoids  -- a class of pain medication that includes Lyrica and Neurontin – significantly raise the risk of obesity and high blood pressure, according to a large new study published in PLOS ONE.

British researchers analyzed health data on over 133,000 people, comparing the Body Mass Index (BMI), waist circumference, blood pressure and sleeping habits of patients taking pain relievers to those who did not. The study is believed to be the largest to look at the effects of painkillers on overall health.

“In the last two decades there has been a significant increase in the number of people being prescribed both opioid and non-opioid medications to treat chronic pain,” said lead author Sophie Cassidy, PhD,  a research associate at the Institute of Cellular Medicine, Newcastle University. “We already know that opiates are dependency-forming but this study also found patients taking opiates have the worst health. Obesity rates are much higher and the patients reported sleeping poorly.”

Those taking opioids were 95% more likely to be obese, 82% more like to have a “very high” waist circumference and 63% more likely to have hypertension compared to the control group.  

“There could be a number of possible mechanisms by which opioids might be associated with weight gain. Sedation might decrease physical activity and therefore reduce energy expenditure, those in our cohort taking opiates were less active, and those taking both opiates and other sedative drugs were the least active. Opioids have also been shown to alter taste perception with a craving for sugar and sweet foods described,” Cassidy wrote.

“These results add further weight to calls for these chronic pain medications to be prescribed for shorter periods.”

Patients who took gabapentinoids were also more likely to be obese, have a bigger waist and higher blood pressure compared to those not taking the drugs.

Gabapentinoids are commonly prescribed as alternatives to opioids to treat neuropathy, shingles and fibromyalgia, although many patients complain about side effects such as weight gain, depression and anxiety.

As PNN has reported, gabapentinoids are also coming under scrutiny because they are increasingly being abused. Lyrica (pregabalin) and Neurontin (gabapentin) are being reclassified as controlled “Class C” substances in the UK, following a spike in the number of deaths involving the medications.

Last week, the West Virginia Board of Pharmacy designated gabapentin as a “drug of concern,” after overdoses in the state involving gabapentin rose from 36 deaths in 2012 to 106 in 2016.  Ohio, Pennsylvania and Kentucky have also reported increases in fatal overdoses involving gabapentin.