Tramadol Banned by Anti-Doping Agency

By Pat Anson, PNN Editor

When it comes to treating pain, tramadol (Ultram) is widely seen as a weak synthetic opioid that provides little relief to patients with severe or chronic pain.

“I get a lot more relief from aspirin” and “this stuff does nothing but make you dizzy and sleep,” are some of the comments PNN readers have made about tramadol.  

But some professional athletes, particularly those in cycling, have a completely different take on tramadol. They use it as a performance enhancing drug that can help them run, skate or peddle faster, and for longer periods of time. That’s why the World Anti-Doping Agency (WADA) is adding tramadol to its list of prohibited drugs, starting in 2024.

“Tramadol has been on the WADA Monitoring Program for some years. Monitoring data has indicated significant use in sports including cycling, rugby and football,” WADA said in a statement. “Research studies funded by WADA have confirmed the potential for tramadol to enhance physical performance in sports.”

Results from one of those studies, recently published in the Journal of Applied Physiology, confirm many of WADA’s concerns. UK researchers enrolled 27 cyclists in a double-blind randomized study, in which they were given either 100mg tramadol or a placebo before engaging in 30 minutes of high intensity cycling, followed by a 25-mile time trial.

On average, the cyclists who took tramadol were 1.3% faster in the time trial (TT) than those given a placebo. That doesn’t sound like much, but in the highly competitive world of professional cycling, even a few seconds can be the difference between finishing first or second.

Interestingly, the researchers found there were “no differences in pain intensity” between the cyclists on tramadol and those who took the placebo.

“This study demonstrates that highly trained cyclists can maintain a significantly higher power output and complete a competitive TT in a significantly faster time following acute ingestion of 100 mg of fast-acting soluble tramadol. Tramadol reduced the perception of effort for a given power output but had no discernible impact on pain intensity whilst cycling,” wrote lead author Alexis Mauger, PhD, a professor in the School of Sport and Exercise Sciences at the University of Kent.

“The findings from this study suggest that tramadol elicits a significant performance-enhancing effect in highly trained cyclists, such that it can change the outcomes of a race. Given the evidence of the historical prevalence of use of tramadol in sport with the intention of improving performance, and the risks pertaining its use, this study provides strong evidence to justify its inclusion on the 2024 Prohibited Substance List.”

To be clear, no one is taking tramadol away from pain patients. But professional athletes who test positive for tramadol — without a medical reason for taking it — run the risk of suspension or disqualification if their sport follows the WADA guidelines..

Previous studies by Mauger found that acetaminophen (Tylenol) gave a 2% boost in performance for cyclists, suggesting that even a mild analgesic can be helpful in making endurance exercise seem easier. Conversely, it also lends weight to pain sufferers who say tramadol works no better than Tylenol or aspirin.      

“Now we have a conundrum. Tramadol, an opioid painkiller, appears to have had no effect whatsoever on the pain experienced during cycling. On the other hand, it significantly lowered the perception of effort, which in turn…  improved performance,” journalist Alex Hutchinson wrote in Outside. “I’m not sure what to make of this finding, but it reaffirms my sense that we still have a lot to learn about how pain and effort and other related constructs like mental fatigue influence our performance.”

The U.S. Food and Drug Administration classifies tramadol as a Schedule IV controlled substance, meaning it has less potential for abuse and addiction compared to opioids like oxycodone or hydrocodone, which are Schedule II drugs.

In recent years, prescriptions for tramadol have soared in the U.S. because it is considered “safer” than other opioids. In many third world countries, however, tramadol is widely misused. In 2019, Public Citizen filed an unsuccessful petition with the FDA to have tramadol reclassified as a Schedule II drug, saying there was “overwhelming evidence” that tramadol was a public health risk.

Tramadol Raises Risk of Low Blood Sugar

By Pat Anson, PNN Editor

Patients who take the opioid tramadol are at greater risk for developing hypoglycemia – a condition caused by very low blood sugar -- than those taking other pain medications, according to researchers at the University of California San Diego.

Prescriptions for tramadol – a synthetic opioid sold under the brand names Ultram and ConZip – have been increasing because it is perceived as a “safer” opioid with less rick of addiction. Tramadol is currently ranked among the top five prescribed opioids in the United States.

As tramadol use has grown, so have documented cases of adverse effects such as dizziness, nausea, headaches and constipation — all common side effects of opioids.

The link to hypoglycemia was discovered by accident when researchers at UCSD’s Skaggs School of Pharmacy and Pharmaceutical Sciences analyzed more than 12 million reports from the FDA’s Adverse Event Reporting System from January 2004 to March 2019.

“The impetus was the recent dramatic surge in tramadol popularity and prescriptions,” said Tigran Makunts, PharmD, first author of the study published in Scientific Reports. “We wanted to have an objective data-driven look at its adverse effects and bumped into a dangerous, unlisted and unexpected hypoglycemia.”

The researchers compared adverse events involving tramadol to those linked to other widely prescribed opioids and non-opioid medications, such serotonin and norepinephrine reuptake inhibitors (Cymbalta, Effexor XR) and NMDA receptors (ketamine and memantine).

Only tramadol produced a significant risk of developing hypoglycemia. There was a 10-fold greater risk of hypoglycemia using tramadol than virtually every other opioid except methadone, which is typically used to treat addiction.

Hypoglycemia is often related to the treatment of diabetes, but can also occur in persons without diabetes. Left untreated, hypoglycemia can lead to serious complications, such as neurocognitive dysfunction, vision loss, greater risk of falls and loss of quality of life.

“The takeaway message is to warn physicians about the likelihood of low blood sugar, in particular if the patient is predisposed to diabetes,” said senior author Ruben Abagyan, PhD, a professor of pharmacy at UCSD.

“It may be beneficial to monitor glucose levels when initiating tramadol or methadone in both diabetic and non-diabetic patients. Alternative opioids or non-opioid pain medications may be safer to use with patients at risk of hypoglycemia or any complications associated with hypoglycemia.”

Tramadol was classified in 2014 by the DEA as a Schedule IV controlled substance, a category that means it has a low potential for abuse. A recent study, however, by Mayo Clinic researchers found that patients who took tramadol for post-surgical pain have a slightly higher risk of prolonged use than those taking oxycodone or other short acting opioids.

In 2017, the FDA banned the use of tramadol in children under the age of 12, citing a handful of cases where children died or had serious breathing problems after using the drug.

Study Finds Antidepressants Make Tramadol Less Effective for Pain Relief

By Pat Anson, PNN Editor

Common antidepressants interact with the opioid medication tramadol to make it less effective for pain relief, according to a small new study from University Hospitals (UH) in Cleveland. The findings suggest that some patients who exceed their prescribed dose of tramadol may be under-medicated and are seeking more effective pain relief.

Prescriptions for tramadol – which is sold under the brand names Ultram and ConZip – have increased in recent years because it is widely perceived as a “safer” opioid with less rick of addiction. Many patients, however, say tramadol is not as effective as hydrocodone, oxycodone and other opioids.  

UH researchers reviewed the prescription records of 152 patients who received tramadol for at least 24 hours.

Those patients who were also taking the antidepressants Prozac (fluoxetine), Paxil (paroxetine) or Wellbutrin (bupropion) required three times more tramadol per day to control their breakthrough pain, compared to patients not taking the antidepressants.

Previous studies on healthy volunteers have shown effects on blood levels when combining tramadol with those particular antidepressants. However, this was the first study to document the effects of this interaction in a real-world setting with pain patients.

"We knew that there was a theoretical problem, but we didn't know what it meant as far as what's happening to pain control for patients," said Derek Frost, PharmD, a UH pharmacist and lead author of the study, which was published in the journal Pharmacotherapy.

Frost says millions of Americans may be suffering the ill effects of this drug-to-drug interaction.

"Tramadol relies on activation of the CYP2D6 enzyme to give you that pain control," Frost said. "This enzyme can be inhibited by medications that are strong CYP2D6 inhibitors, such as fluoxetine, paroxetine and bupropion.

“Many chronic pain patients are taking antidepressants, mainly selective serotonin reuptake inhibitors (SSRIs), which many of these CYP2D6 inhibitors fit into. There are a lot of patients who experience both, unfortunately. The likelihood that somebody on one of these offending agents and tramadol is relatively high."

Frost says the problem has a relatively easy fix.

"We have a lot of other antidepressants available that are in the same class of medication that don't inhibit this particular enzyme, such as Zoloft (sertraline), (Celexa) citalopram and Lexapro (escitalopram)," he said. "You also have other options for pain control - non-opioid medications such as NSAIDs. If we need to use opioids, a scheduled morphine or a scheduled oxycodone would avoid this interaction."

Tramadol is a synthetic opioid that was rescheduled by the Drug Enforcement Administration in 2014 as a Schedule IV controlled substance, a category that means it has a low potential for abuse. That same year, hydrocodone was rescheduled as a Schedule II drug, meaning it has a high potential for abuse. Many patients who were taking hydrocodone were switched to tramadol as a result of the rescheduling.

Is Tramadol Just as Addictive as Other Opioids?

By Pat Anson, PNN Editor

Patients recovering from surgery who take the opioid tramadol have a slightly higher risk of prolonged use than those receiving oxycodone or other short acting opioids, according to a large Mayo Clinic study.

Prescriptions for tramadol – which is sold under the brand names Ultram and ConZip – have been increasing because it is widely perceived as a “safer” opioid with less rick of addiction. The new study, published in The BMJ, appears to debunk that claim, at least for surgery patients.

Mayo Clinic researchers looked at health data for over 350,000 patients who were prescribed opioids after undergoing 20 common surgeries in the U.S. between 2009 and 2018. A little over 7% of the patients were still refilling opioid prescriptions 90-180 days later. When the researchers dug a little deeper into the data, they found that patients taking tramadol had a 6 percent higher risk of prolonged use compared to other opioids.  

"This data will force us to reevaluate our postsurgical prescribing guidelines," says lead author Cornelius Thiels, DO, a general surgery resident in Mayo Clinic School of Graduate Medical Education. "While tramadol may still be an acceptable option for some patients, our data suggests we should be as cautious with tramadol as we are with other short-acting opioids."

Tramadol is a synthetic opioid that was classified as a Schedule IV controlled substance by the Drug Enforcement Administration in 2014, a category that means it has a low potential for abuse. That same year, hydrocodone was rescheduled as a Schedule II drug, meaning it has a high potential for abuse.

Many patients who were taking hydrocodone were switched to tramadol as a result of the rescheduling.

Over half (53%) of the patients in the Mayo Clinic study were prescribed hydrocodone, about a third (37.5%) received oxycodone (also a Schedule II drug) , and only 4% received tramadol.

"We found that people who got tramadol were just as likely as people who got hydrocodone or oxycodone to continue using opioids past the point where their surgery pain would have been expected to be resolved," said senior author Molly Jeffery, PhD, the scientific director of research for the Mayo Clinic Division of Emergency Medicine. "This doesn't tie to the idea that tramadol is less habit forming than other opioids."

Jeffery and his colleagues say the DEA and FDA should consider reclassifying tramadol to a level that better reflects the risk of prolonged use.

"Given that tramadol is not as tightly regulated as other short-acting opioids, these findings warrant attention," said Thiels.

In 2017, the FDA banned the use of tramadol in children under the age of 12, citing a handful of cases where children died or had serious breathing problems after using the drug.

Tramadol was classified as a Schedule 3 drug in the United Kingdom in 2014. It is an unscheduled drug in Canada, but Health Canada is currently reviewing its status.