http://www.spacedoc.net/zocor_UK_side_effect_reports ( Data Source)
Abstract
Objective: What prompted me to do this personal search of what most would agree is FDA's business is the almost total lack of awareness in the medical community of the many cases of cognitive dysfunction, severe emotional and behavioral disorders and disabling neuro-muscular degeneration associated with the use of statin drugs. I knew that thousands of reports of these conditions had gone into Medwatch. What is wrong with the ADR reporting system, I wondered, that the medical community seems unaware of these reports of statin damage?
Methods: I gained access to a CD of actual Lipitor Medwatch data from the period Nov 1997 to early 2007. Using the usual PC search mechanism, it was technically straight-forward to count out numbers of case reports for each search term I entered.
Results: The numbers of case reports for such search terms as severe cognitive dysfunction (662), neuropathy (547), rhabdomyolysis (1592) , depression (517), unusual weakness (1158) and hepatitis (951) during the reporting period are particularly impressive to most MDs when weighed against their awareness that the true incidence of side effect reporting may be ten to one hundred times the reported incidence.
Conclusions: There is reason to suspect that because of unreliable FDA reporting of significant Medwatch data, the medical community has been grossly misled as to the true magnitude of the statin drug side effect problem.
INTRODUCTION
If Medwatch is the protective health "umbrella" in the United States for
post-marketing ADRs, how is it that eight years after the official Medwatch
reporting of my personal Lipitor-associated transient global amnesias to FDA,
the Chief of Cardiology of a major university/teaching hospital can tell me
recently during a symposium that he had never heard of any significant cognitive
problems from statin drugs? He was lecturing a large group of medical personnel
about statin drug use. Similarly, it was Ralph Edwards of the World Health
Organization's Vigibase drug monitoring system who announced to the world
"excess ALS associated with statin use worldwide, " while FDA stood silent. They
apparently had missed it. And why aren't doctors aware that over the past eight
years some 20 rhabdomyopathy deaths per year are caused by Lipitor alone? It is
for this reason that I suspected that Medwatch information on statin ADRs is not
being adequately reported back to the doctors who write the prescriptions.I was
the recipient of a CD from FDA containing all the Lipitor ADRs from November
1997 through January 2007. I manually counted case reports for each search
term. Although special software exists to make this task less cumbersome it is
available only to drug company and FDA personnel. One of the benefits of
retirement is time to do the important things.
RESULTS
Based upon my personal experience with this drug (see Lipitor, Thief of Memory)
"amnesia" was the first search term I entered. Not unexpectedly, 399 case
reports resulted. The search term "memory impairment" produced another 263
cases. This total of 662 reports of serious cognitive dysfunction associated
with the use of Lipitor seemed to fit quite well with the total numbers of such
reports entered in my repository over this same time period. I was concerned
only with the more severe forms of cognitive loss during this phase of my study
and was not at this time looking for such conditions as confusion,
forgetfulness, disorientation or aggravation of senility. Knowing of the
hundreds of neuropathy cases in my repository and many of them associated with
Lipitor, "neuropathy
Drug | Number of Cases | % of Total Cases | Cases
without Fibrates |
Percentage
of cases without Fibrates |
Atorvastatin | 86 | 11.1% | 73 | 84.9% |
Cerivastatin | 387 | 50.1% | 187 | 48.3% |
Fluvastatin | 10 | 1.3% | 8 | 80.0% |
Lovastatin | 32 | 4.1% | 30 | 93.8% |
Pravastatin | 70 | 9.1% | 62 | 88.6% |
Simvastatin | 187 | 24.2% | 164 | 87.7% |
TOTAL | 772 | 524 | 67.9% |
Even though cerivastatin ( Baycol ) was the big player in the rhabdomyolysis
field back then, it is obvious that the contribution of cases from other statins
was considerable. Half of all rhabdomyolysis cases it seems were due
to statins other than Baycol, so all doctors expected to see more of this
dreaded complication despite Baycol's withdrawal from the market. But still the
number 1592 reported for Lipitor seemed excessive, particularly when a glance at
Wolfe's Table 2 shows us that approximately 10% of rhabdomyolysis cases result
in death.
Table 2.
Deaths reported in Statin-Associated Rhabdomyolysis ( October 1997 through
December 2000)
Drug | Number of Cases | Percent of
Total Deaths |
Cases
without Fibrates |
Percent of
cases of each drug without Fibrates |
Atorvastatin | 13 | 18.1% | 11 | 84.6% |
Cerivastatin | 20 | 27.8% | 10 | 50.0% |
Fluvastatin | 1 | 1.4% | 1 | 100% |
Lovastatin | 5 | 6.9% | 5 | 100% |
Pravastatin | 9 | 12.5% | 8 | 88.9% |
Simvastatin | 24 | 33.3% | 19 | 79.2% |
Total | 72* | 54** | 75% |
Dr. Wolfe's table of statin rhabdomyolysis events by drug for the time period
10/1/03-9/30/04, Table 3, suggests that although Lipitor remains a major player,
Crestor now shares center stage along with Zocor.
Table 3:
Comparative Rates of Rhabdomyolysis Reports to FDA
Drug |
Rhabdomyolysis reports to FDA (10/1/03-9/30/04) |
Rx's Filled
(millions) (10/1/03-9/30/04) |
Rhabdomyolysis reports per million Rx's |
Crestor
rate as multiple of other rates |
Crestor | 68 | 5.2 | 13.1 | -- |
Zocor | 139 | 29.8 | 4.7 | 2.8 |
Mevacor | 16 | 8.0 | 2.0 | 6.6 |
Lipitor | 87 | 66.6 | 1.3 | 10.1 |
Lescol | 2 | 2.1 | 0.95 | 13.8 |
Pravachol | 9 | 15 | 0.60 | 21.8 |
All statins
except Crestor |
253 | 121.5 | 2.1 | 6.2 |
Adding all of the rhabdomyolysis reports for the 12 month period - 253 plus
Crestor's 68 - produces the total of 321. Applying Wolfe's 10% figure to the 321
total cases for the year produces a possible 32 deaths from statin
rhabdomyolysis for that 12 month period. The estimate, using Dr. Wolfe's
formula, for the average number of Lipitor rhabdomyolysis deaths/year during
the period I studied is 20. I next searched for words that might reflect the
apparent effects of statin drugs on emotion and behavior now being reported
by statin users and being actively researched by Dr Beatrice Golomb (2),
Director of the statin study at UCSD college of Medicine.
DISCUSSION
It is generally understood that the simple association of a sign or symptom with
the use of statins does not of itself imply causality. Only when the numbers of
case reports become clearly excessive or specially unique in character is one
justified in considering a possible cause and effect relationship.
One is reminded here of the beginning of the misguided war on cholesterol when elevated cholesterol was associated with proneness to atherosclerosis. Inferring cholesterol causation on the basis of association is roughly the same as saying the presence of firemen at fires clearly proves causal relationship. Nevertheless we did it with cholesterol and brainwashed two generations of doctors. In this study we do have numbers that for some of the conditions studied seem clearly excessive and the memory loss data is sufficiently unique by known statin mechanism of action to justify special concern. Only in the year 2003 did Pfrieger (3) publish his evidence that cholesterol was critical to memory function. He demonstrated that hippocampal synapses
for memory were completely dependant upon abundant cholesterol and revealed to the world that glial cells are charged with this function in humans. Circulating blood cholesterol is not available to the brain, Pfrieger tells us, because the lipoprotein/cholesterol molecule is far too large a molecule to cross our blood brain barrier. Memory function is completely dependant upon glial cell synthesis of cholesterol and naturally glial cells were just as sensitive to statin effect as any other cell in our body. When glial cell synthesis in impaired, cholesterol falls and with it memory function. Whereas some respond with transient global amnesia, others respond with short-term memory loss, confusion, disorientation and increased forgetfulness. Although some will state, "I have been on statins five years with no memory problems" Muldoon (4) has shown on two occasions, once with Mevacor and again several years later with Zocor, that 100% of statin users show cognitive loss if sufficiently sensitive testing is done. From the very beginning statin makers have told us that statins are reductase inhibitors (A substance that blocks an enzyme needed by the body to make cholesterol and lowers the amount of cholesterol in the blood. HMG-CoA reductase inhibitor drugs are called statins. Also called hydroxymethylglutaryl-coenzyme A reductase inhibitor.) but they never old us what that really meant. Most doctors had complete faith in the pharmaceutical industry to do the right thing so they never bothered to look up reductase inhibition in their dusty biochemistry books. If they had, they would have found this reductase step is at the very beginning of the mevalonate pathway, a collection of biochemical steps critical not only for cholesterol synthesis but also for CoQ10 and dolichol and selenoprotein synthesis, Rho activation and normal phosphorylation. When statins block cholesterol synthesis all of these other functions are blocked to the same degree. It is like girding a tree. You do not cut just cholesterol synthesis with statins; you inevitably cut all other mevalonate functions (is a key organic compound in biochemistry. It is a precursor in the biosynthetic pathway, known as the HMG-CoA reductase pathway, that produces terpenes and steroids). In their priority for cholesterol reduction, the drug companies led us to complete acceptance of these inevitable effects on these other elements of the pathway as collateral damage. These drugs were marketed to a nation of guinea pigs, for none of this possible harm had been researched at all and so the statin drug side effects began to accumulate. Cognitive side effects, we soon learned, were due to glial cell inhibition by statins and failure of Rho activation (5). Problems with cell wall integrity loss, interference with energy formation and increased mitochondrial mutations all relate to CoQ10 interference.Dolichol inhibition led to problems with glycoprotein synthesis critical for neuropeptide synthesis, cell identification, cell messaging and immunodefense. No longer could we identify DNA errors and correct them, for glycoproteins are involved, aiding and abetting the DNA mutation rate. The list goes on and on. And now over the past decade there have been thousands of victims with cognitive deficits, permanent neuropathies and myopathies, chronic neuromuscular degeneration and chronic neurodegenerative disease such as ALS and Parkinsonism. All of these conditions have been associated with the use of statins yet causality has been all but impossible to prove. Recently, however, evidence has been mounting that just might change all this for the ultimate effect of mevalonate blockade of CoQ10 and dolichols is mitochondrial mutations, inducing structural changes that can be visualized. Now we find that among the many side effects of statin drug use is the same direct assault on mitochondrial DNA and the energy equation produced by natural aging. The well-known statin side effect of coenzyme Q10 inhibition bears directly upon the effectiveness of the anti-oxidation system, leading directly to excess ROS (reactive oxygen species) production with its age-like mutagenic consequences.
SERIOUS DAMAGE!!! Additionally, another well-known statin side effect, that of dolichol inhibition, results directly in failure of glycoprotein synthesis and loss of effectiveness of many of our glycoprotein based systems, such as glycohydrolases for detection and correction of DNA damage. Statin drugs cause effects on our mitochondria identical to those that accumulate with age. One might say that one side effect of statin therapy is premature aging. Now I believe I know why many statin side effects are permanent and why weakness and fatigue are such common complaints. Many statin victims say that abruptly, almost in the blink of an eye, they have become old people. MD's, for the most part unaware of the truth because FDA has not informed them, reassuringly say, "You have to expect these things now. You are not fifty any more." Unwittingly our doctors have come close to the mark, for aging is what statins appear to do. During the past two decades much has been learned about mitochondrial myopathies and their association not only with ragged red myofibrils but also with a great variety of neuro-degenerative syndromes. In 1995, Rifai, Z and others (6) after studying the frequency of ragged red fibers in muscle biopsy specimens, reported in Neurology that that the number of ragged red fibers increases with normal aging and may reflect an age-related decline in muscle mitochondrial oxidative metabolism. What was known then as inclusion body myositis consistently revealed ragged red myofibrils marking it as secondary to a defect in the respiratory chain and therefore metabolic in origin rather than inflammatory.CONCLUSIONS
Although abundant research evidence now supports the reality of serious statin
damage in susceptibles, primarily the consequence of mevalonate inhibition by
statins, most of the medical community appears unaware of this. A major
contributing factor has been lack of meaningful feedback of Medwatch data back
to the doctors.
REFERENCES
1. Gaist D and others.Statins and the risk of
polyneuropathy: a case control study. Neurology
58: 1333-37, 2002.
2. Golomb BA. Cholesterol and violonce: is there a
connection? Annals of Internal Medicine 138: 478-
87, 1998.
3. Pfrieger F. Brain reesearcher discovers bright side
of ill-famed molecule. Science, 9 November, 2001.
4. Muldoon MF and others. Effects of lovastatin on
cognitive function and psychological well-being.
Am J Med 108(7) 538-460, 2000.
5. Hope, S. Rho and memory function.
http://www.pnas.org/cgi/content/full/0610059104/DC1
6. Rafai Z and others. Ragged red fibers in normal
aging and inflammatory myopathy. Ann Neurol
Aug 38(2): 273-4, 1995.
7. Carvello S. Statin-associated myopathy. JAMA;
289:1681-1690, 2003.
Duane Graveline MD MPH
Former USAF Flight Surgeon
Former NASA Astronaut
Retired Family Doctor
ZocorŪ ( Simvastatin ) - UK Side Effect Reports
Drug Analysis Print (MHRA, UK)
Reported Problem from Simvastatin | All | Fatal |
Blood disorders | 82 | 1 |
Cardiac disorders | 172 | 10 |
Congenital disorders | 11 | 0 |
Ear disorders | 56 | 0 |
Endocrine disorders | 14 | 0 |
Eye disorders | 233 | 0 |
Gastrointestinal disorders | 1167 | 4 |
General disorders | 1004 | 13 |
Hepatic disorders | 16 | 2 |
Immune system disorders | 31 | 0 |
Infections | 70 | 6 |
Injuries | 75 | 0 |
Investigations | 696 | 0 |
Metabolic disorders | 141 | 0 |
Muscle & tissue disorders | 2058 | 12 |
Neoplasms | 41 | 5 |
Nervous system disorders | 1267 | 2 |
Pregnancy conditions | 16 | 2 |
Psychiatric disorders | 749 | 2 |
Renal & urinary disorders | 218 | 3 |
Reproductive & breast disorders | 187 | 0 |
Respiratory disorders | 324 | 4 |
Skin disorders | 1107 | 0 |
Social circumstances | 7 | 0 |
Surgical & medical procedures | 2 | 0 |
Vascular disorders | 111 | 0 |
TOTAL NUMBER OF REPORTED REACTIONS | 10055 | 66 |
For comparison, my report of US FDA ADRs for Lipitor can be found here