Skip to comments.Scientists Spot How Cox-2 Painkillers Raise Heart Risks
Posted on 05/07/2012 4:08:49 AM PDT by neverdem
New research has uncovered how some cox-2 painkillers increase the risk for both heart attacks and stroke.
The once popular cox-2 drugs, Vioxx and Bextra, were pulled off the market in 2004 and 2005, respectively, after research showed that both raised the chances of cardiovascular trouble. Meanwhile, Celebrex, a painkiller in the same drug class that remains on the market, carries a "black box" warning alerting patients to potential heart risks.
Now, a team of scientists from the University of Pennsylvania in Philadelphia say that, although cox-2 inhibitors are very good at inhibiting the workings of the cox-2 enzyme -- and thereby easing pain -- they also throw off the cardiovascular system's delicate balance by inhibiting an enzyme that relaxes blood vessels and guards against clotting.
"It's really about a rock and a hard place," said Dr. Christopher Cannon, a cardiologist at Brigham and Women's Hospital in Boston. "There's a balance in the bloodstream of clotting and vasoconstriction, as well as protection against clotting and vasodilation, which means that there's a constant balance of clotting and preventing clotting, and constricting arteries and dilating arteries."
"But with cox-2 inhibitors, they have found that you knock the protective side of that balance off," Cannon said. "And then you're left only with the constrictive part, which means the drugs up the risk for clotting and arterial constriction."
"This problem is bigger than just Vioxx, which no longer exists," he added. "It applies to every single NSAID (non-steroidal anti-inflammatory drug), because with all NSAIDs -- including Celebrex and ibuprofen, which zillions of people take -- the same issue exists. You block out the good stuff and leave the bad stuff unchecked. The one exception is Naproxen, which has an anti-platelet effect that seems to work against stroke and heart attack risk."
"Sometimes you have to take a cox-2 because you have really bad daily pain," said Cannon. "But this is a dose-dependent problem, with the more cox-2 you take the greater the cardiovascular risk. So you have to limit the dose and take the least amount you can get away with, so you can try to control crippling pain but also try not to poison your blood vessels and predispose yourself to clotting and high blood pressure."
The latest research was led by Dr. Garret FitzGerald, chairman of Penn's department of pharmacology and director of the Institute for Translational Medicine and Therapeutics. He and his colleagues published their findings in the May 2 issue of the journal Science Translational Medicine and the April 9 online issue of the Proceedings of the National Academy of Sciences.
I thought they’d known this for sometime. I’m down to one 800mg of Ibuprofen a day for osteoarthritis. Back to aspirin and the chance of bleeding ulcers. Nothing is safe.
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"The one exception is Naproxen, which has an anti-platelet effect that seems to work against stroke and heart attack risk."
I'd take a baby aspirin and check out Naproxen. Aspirin is supposed to irreversibly inhibit platelet agregation, or so I was taught.
I don't know about Naproxen besides that claim.
I took Naproxen many years ago when it was prescription only. I think it’s OTC Alleve now. It works too.
BTW my arthritic hip turned out to be Stage 4 necrosis. Powder. As soon as they got that nasty thing out last year my blood is back to normal. I’m king of the world! Well, except for the knee thing ;D!
You don't want that either.
I got off the ibuprofen with taking fish oil supplements
that also seem to help with inflammation.
I got off the ibuprofen by taking fish oil supplements
that also seem to help with inflammation.
Borage oil and black currant seed oil are both omega-6 oils that are high in GLA (gamma linolic acid) and do better at lowering cholesterol than fish oil (and dont taste like crap when you belch) and the GLA helps your body naturally control inflamation a thousand times better than fish or even krill oil.
Enteric coating helps with stomach upset but has not been shown to decrease the risk of ulcers caused by NSAIDS.
I think NSAIDS carry a lower risc of ulceration than high dose aspirin but it has been decades since I’ve seen literature regarding the matter.
That said, I find the same thing, Naproxen upsets my stomach more than aspirin or ibuprofen but it seems to vary by individual, my wife tolerates Naproxen better than ibuprofen.
The danger is no worse than before you read the article. And it’s very minimal with one dose of ibuprofen a day. Ibuprofen also has the anti-platelet effect, albeit short-lived and only for a few days, that aspirin (antiplatelet for the life of platelets in circulation when you take it) and naproxyn (a few day’s antiplatelet effect).
The article is a single report on *how* something happens. And, as you thought, it’s an action that we’ve known about for awhile.
I wouldn’t change your routine - in fact, I take Celebrex about once or twice a week.
Talk to your doctor before changing, especially when news like this comes out.
***”The one exception is Naproxen...”***
My mom talked her doctor into giving her perscription Naproxin for her arthritis. He warned her he would have to monitor her kidney function real close. She still wanted it.
One dose and it killed her kidneys dead. She died not long after from renal failure.
I will never take Naproxin or anything with it in it.
Sounds like good advice. Taming severe pain to moderate is my daily goal.
Use deglycerrized licorice to protect your stomach. You can get it at most health food stores. I used it when I was taking 6 - 325mg aspirin a day for extended time.
see post 16
Thanks! Some of the best advice right here at FreeRepublic!