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Dabigatran: A Promising Alternative to Warfarin

On October 19, 2010, the FDA approved a long-awaited new drug, dabigatran, expected to replace warfarin (Coumadin) as a better way to prevent blood clots in susceptible patients. This provides an opportunity to re-visit several issues that we have addressed before, including Big Pharma tactics, drug approval by the FDA, deciding what is adequate evidence, applying science to clinical practice, and making individual health care decisions based on evidence that is sometimes incomplete.

Background

Patients with atrial fibrillation, artificial heart valves, deep vein thrombosis, pulmonary embolism, antiphospholipid syndrome, and people undergoing certain types of surgery are at risk of blood clots, embolism, and stroke. They are currently being treated with rat poison. Warfarin (Coumadin) is an anticoagulant originally intended to kill rats. It inhibits the vitamin K dependent synthesis of several clotting factors. It saves human lives but is a mixed blessing. It takes several days to achieve therapeutic levels. Patients must be monitored with frequent blood tests to ensure that their prothrombin levels stay between an INR (international normalized ratio) of 2 and 3. When starting out, this means blood tests every couple of days. For some patients, dosage fluctuates and requires frequent adjustments; others can eventually drop down to a monthly blood test. Warfarin interacts with a long list of other drugs that raise or lower its blood levels. It interacts with many foods, and patients have to modify their diet. It can cause serious bleeding complications; while preventing thrombotic strokes it can cause hemorrhagic strokes. It is taken once daily. There is an antidote, vitamin K, that can reverse its effects promptly.

Warfarin is the 11th most prescribed drug in the US. Its benefits clearly outweigh its risks, but we wish the risks were fewer. We have yearned for a better option: something safer, something that would not require monitoring with blood tests, something that foods wouldn’t interfere with, something that would not interact with every other drug in the book. And now it seems we have it: a direct thrombin inhibitor called dabigatran.

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Posted in: Pharmaceuticals

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Chronic Pain: A Disease in its Own Right

Melanie Thernstrom has written a superb book based on a historical, philosophical, and scientific review of pain: The Pain Chronicles: Cures, Myths, Mysteries, Prayers, Diaries, Brain Scans, Healing, and the Science of Suffering. Herself a victim of chronic pain, she brings a personal perspective to the subject and also includes informative vignettes of doctors and patients she encountered at the many pain clinics she visited in her investigations. She shows that medical treatment of pain is suboptimal because most doctors have not yet incorporated recent scientific discoveries into their thinking, discoveries indicating that chronic pain is a disease in its own right, a state of pathological pain sensitivity.

Chronic pain often outlives its original causes, worsens over time, and takes on a puzzling life of its own… there is increasing evidence that over time, untreated pain eventually rewrites the central nervous system, causing pathological changes to the brain and spinal cord, and that these in turn cause greater pain. Even more disturbingly, recent evidence suggests that prolonged pain actually damages parts of the brain, including those involved in cognition. (more…)

Posted in: Book & movie reviews, Neuroscience/Mental Health

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Journal Club Debunks Anti-Vaccine Myths

American Family Physician, the journal of the American Academy of Family Physicians, has a feature called AFP Journal Club, where physicians analyze a journal article that either involves a hot topic affecting family physicians or busts a commonly held medical myth. In the September 15, 2010 issue they discussed “Vaccines and autism: a tale of shifting hypotheses,” by Gerber and Offit, published in Clinical Infectious Diseases in 2009.  

The article presented convincing evidence to debunk 3 myths:

  1. MMR causes autism.
  2. Thimerosal (mercury) causes autism.
  3. Simultaneous administration of multiple vaccines overwhelms and weakens the immune system, triggering autism in a susceptible host.

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Posted in: Vaccines

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Energy Bracelets: Embedding Frequencies in Holograms for Fun and Profit

A salesman is demonstrating a new product at a sports store in the local mall. He has a customer stand with his arms extended horizontally to the sides; he presses down on an arm and the customer starts to fall over. Then he puts a bracelet on the customer and repeats the test; this time he is apparently unable to make the customer lose his balance. He has the customer turn his head as far as he can without the bracelet, and shows that he can turn his head a few degrees more after he puts on the bracelet. (Try this yourself: if you turn your head, wait a couple of seconds and try again, you will always be able to turn it further on the second trial). He similarly shows that the customer is stronger when he wears the bracelet. The customer and the onlookers are mightily impressed by the demonstration, by the salesman’s testimonials, and by the endorsements of famous athletes: they buy the bracelets to improve their athletic performance.

These so-called energy bracelets (also pendants and cards) allegedly contain a hologram embedded with frequencies that react positively with your body’s energy field to improve your balance, strength, flexibility, energy, and sports performance; and they also offer all sorts of other benefits (such as helping horses and birds and relieving menstrual cramps and headaches). The claims and the language on their websites are so blatantly pseudoscientific it’s hard to believe anyone would fall for them. Here are just a few examples from the Power Balance website:

  • We react with frequency because we are a frequency.
  • Your body’s energy field likes things that are good for it.
  • Why Holograms? We use holograms because they are composed of Mylar—a polyester film used for imprinting music, movies, pictures, and other data. Thus, it was a natural fit.
  • A primitive form of this technology was discovered when someone, somewhere along the line, picked up a rock and felt something that reacted positively with his body.

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Posted in: Energy Medicine

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High Dose Flu Vaccine for the Elderly

Dr. Novella  has recently written about this year’s seasonal flu vaccine and Dr. Crislip has reviewed the evidence for flu vaccine efficacy.

There’s one little wrinkle that they didn’t address — one that I’m more attuned to because I’m older than they are.  I got my Medicare card last summer, so I am now officially one of the elderly. A recent review by Goodwin et al. showed that the antibody response to flu vaccines is significantly lower in the elderly.  They called for a more immunogenic vaccine formulation for that age group. My age group.

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Posted in: Vaccines

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Science and Morality

I have frequently said that science can only provide data to inform our decisions but can’t tell us what we “should” do; that it can determine facts but not values. I stand corrected. A persuasive new book by Sam Harris, The Moral Landscape,  has convinced me that science can and should determine what is moral. In fact, it is a more reliable guide than any other option.

The Moral Landscape

Several recent books have looked at morality from a scientific viewpoint. Animals have been shown to exercise altruism and to appreciate fairness. Human cooperation has been shown to offer a survival advantage to individuals and groups. Game theory has demonstrated the success of the tit-for-tat strategy. In The Science of Good and Evil,  Michael Shermer argues that evolution has produced in us a moral sense that is not a reflection of some “absolute” morality but that constitutes a worthy human project that transcends individuals. He posits a pyramid of morality that becomes more advanced as it is applied to larger in-groups, from self to family to community to all living creatures. He amends the Golden Rule to specify that we should treat others not as we want to be treated but as others want to be treated.  (more…)

Posted in: Book & movie reviews, General

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Mayo Clinic on Home Remedies

I write a lot of critical articles. It’s nice to be able to write a positive one for a change. I received a prepublication proof of The Mayo Clinic Book of Home Remedies: What to Do for the Most Common Health Problems. It is due to be released on October 26 and can be pre-ordered from Amazon.com. Since “quackademic” medicine is infiltrating our best institutions and organizations, I wasn’t sure I could trust even the prestigious Mayo Clinic. I was expecting some questionable recommendations for complementary & alternative medicine (CAM) treatments, but I found nothing in the book that I could seriously object to.

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Posted in: Book & movie reviews

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Eric Pearl “Reconnects” with Hands-Off Healing

I first became aware of chiropractor Eric Pearl through the reprehensible movie The Living Matrix. Several months ago I reviewed that movie and described its segment featuring Pearl as follows:

A 5 year old with cerebral palsy was allegedly healed by “reconnective healing” by a chiropractor who is shown waving his hands a few inches away from the child’s body. Problem: There was no medical evaluation before and after to determine whether anything had objectively changed, and video of the child after treatment shows that his gait is not normal.

I have since learned that Pearl is far more than an eccentric oddball. He is a whole industry. He is teaching his “reconnective healing” methods to others worldwide through seminars in several languages, he engages in aggressive marketing, he offers practice-building advice to his many disciples, and he even foists his beliefs on groups of impressionable young children. I use the word disciples intentionally because there are strong religious overtones to this healing method. 

What is Reconnective Healing? 

“The Reconnection” is similar to therapeutic touch, but goes much farther. He does not need to physically touch patients because they can feel his touch without any contact. They close their eyes and he moves his hands around their bodies but several inches away. They feel a presence, see colors unknown on Earth, and often see angels (one particular angel is George, a multicolored parrot). Afterwards, they report miraculous healings of “cancers, AIDS-related diseases, epilepsy, chronic fatigue syndrome, multiple sclerosis, rheumatoid and osteoarthritis, birth disfigurements, cerebral palsy and other serious afflictions.” (more…)

Posted in: Energy Medicine

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PTSD Breakthrough?: It’s Not Science Just Because Someone Says So

It infuriates me when someone misappropriates the word “science” to promote treatments that are not actually based on science. I have just read a book entitled The PTSD Breakthrough: The Revolutionary Science-Based Compass Reset Program by Dr. Frank Lawlis, a psychologist who is the chief content advisor for Dr Phil and The Doctors. There is very little science in the book and references are not provided. It amounts to an indiscriminate catalog of everything Dr. Lawlis can imagine that might help post-traumatic stress disorder (PTSD) patients.  (more…)

Posted in: Book & movie reviews, Neuroscience/Mental Health

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Brain Balance

A member of Quackwatch’s Healthfraud discussion list recently reported from a health fair:

One booth was a bit of a mystery for me: Brain Balance. “Is your child struggling with ADHD, dyslexia, autism, Asperger’s, Tourette’s, or other related disorders?” A quick glance at their website makes it seem that they may be legitimate.

No, a quick glance at their website makes it seem that they are not legitimate, and a more detailed examination confirms that initial impression. (more…)

Posted in: Clinical Trials, Neuroscience/Mental Health

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