Tuesday, December 5, 2006
Hati Hati Minum Obat Pilek
Suatu penelitian retrospektif yang dilaporkan di New England Journal of Medicine (NEJM) baru
saja diumumkan lewat internet mendahului publikasi resmi. Sudah tentu karena makalah berjudul
“Phenylpropanolamine and the Risk of Hemorrhagic Stroke” itu dianggap penting untuk segera
disebarluaskan.
Fenilpropanolamin (FPA) memang banyak dipakai dalam obat pilek dan penghilang nafsu makan,
meski sejak 20 tahun silam dilaporkan adanya kasus perdarahan di selaput otak atau di dalam
otak setelah makan FPA. Ia merupakan salah satu komponen simpatomimetika (berefek serupa
perangsangan saraf simpatik) yang digunakan dalam obat pilek. Menurut urutan efektivitasnya,
komponen sejenis dalam obat pilek adalah efedrin, pseudoefedrin, FPA, dan etilefrin. Obat pilek
berbahan komponen tersebut bekerja dengan menyempitkan pembuluh darah di selaput lendir
hidung, sehingga pembentukan lendir berkurang. Di samping itu masih ada golongan
antihistamin yang mempunyai efek lemah untuk membantu meringankan gejala melalui efek
antialergi, yang sering menyertai pilek Biasanya dua komponen ini dicampur dalam obat pilek.
Komponen lain, jika ada, merupakan tambahan yang berlebihan, kecuali bila obat tersebut
memang diindikasikan pula untuk gejala lain, misalkan demam, sehingga ditambahkan analgetik
seperti parasetamol.
Sebenarnya, kalau hanya untuk pilek, dosis FPA cukup 12,5 - 25 mg per tablet, per kali.
Sayangnya, FPA banyak disalahgunakan untuk menguruskan badan. Sedangkan untuk
mengurangi nafsu makan dibutuhkan dosis sebesar 75 mg atau lebih. Padahal justru pemakaian
dosis besar telah dihubungkan dengan kejadian stroke hemoragik (berdarah), terutama pada
wanita (umumnya wanita muda yang ingin kurus). Risiko kejadian pada wanita ini mencapai
16.58 kali lebih sering dibandingkan dengan kejadian stroke hemoragik pada orang yang tidak
makan FPA. Sudah tentu risiko ini sangat tinggi, malahan lebih besar ketimbang risiko kejadian
kanker paru-paru oleh rokok (+ 11.0). Karena pria jarang makan FPA untuk menguruskan diri,
mungkin inilah penyebabnya angka risiko untuk wanita lebih besar dibandingkan dengan pria.
FPA sudah lama saya kenal sebagai obat pilek yang kurang baik, bukan saja karena
efektivitasnya lebih rendah, tetapi juga karena ia dapat meninggikan tekanan darah bila dipakai
pada dosis 25 mg atau lebih. Di negeri kita, sekitar 10 tahun lalu, karena masalah efek
sampingnya sudah dikenal bahkan waktu itu (hanya buktinya kurang solid)
Direktorat Jenderal Pengawasan Obat dan Makanan (POM), Depkes RI, memberlakukan
pembatasan dosis FPA dalam obat pilek hingga 15 mg per tablet. Namun, entah mengapa banyak
pabrik kemudian mendapat izin menggunakan FPA dalam dosis 25 mg. Padahal, bukankah hal ini
dapat menambah risiko perdarahan di otak ? Itu sebabnya saya sangat setuju bila sebagai obat
obesitas FPA sebaiknya dilarang, sedangkan sebagai obat pilek dibatasi dosisnya. Sementara itu
etilefrin sifatnya juga seperti FPA dan kurang baik untuk pilek, sehingga perlu pengaturan baru
oleh Ditjen POM. Tinggal efedrin dan pseudoefedrin yang cocok untuk obat pilek, karena dalam
dosis kecil pun efektif, juga tidak menaikkan tekanan darah atau denyut jantung secara
signifikan. Di antara kedua jenis komponen ini, sebenarnya efedrinlah yang lebih baik. Sayang
sekali industri obat cenderung tidak menggunakannya, meski efektivitasnya unggul, semata-mata
karena margin keuntungannya lebih rendah (fakta ini telah saya konfirmasikan dengan produsen
obat pilek terbesar di AS, yang juga menggunakan FPA, dan diiyakan). Betapa pun, baik efedrin
maupun pseudoefedrin dalam obat flu perlu dibatasi dosisnya.
Kini bagaimana kita sebagai konsumen mesti bersikap ? Saya kira ya jelas, pilihlah yang
mengandung efedrin atau pseudoefedrin saja, dengan dosis kecil. Bila masih mau pakai FPA, ya
juga dosisnya tidak lebih dari 15 mg/tablet saja, dan tentu jangan makan dua tablet sekaligus.
Obat menguruskan badan janganlah dimakan sendiri tanpa petunjuk dokter. TAMBAHAN: Obat
pilek untuk bayi dan anak terlupakan untuk diatur, rupanya ini juga mengandung FPA terlalu
tinggi, malahan ada juga yang mengandung phenylephrine, yang efek sampingnya banyak.
INTISARI,2001(updated Sep 2005)
You don't have to look far to find a health product that's totally bogus--or a consumer who's
totally unsuspecting. Promotions for fraudulent products show up daily in newspaper and
magazine ads and TV "infomercials." They accompany products sold in stores, on the Internet,
and through mail-order catalogs. They're passed along by word-of-mouth.
And consumers respond, spending billions of dollars a year on fraudulent health products,
according to Stephen Barrett, M.D., head of Quackwatch Inc., a
nonprofit corporation that combats health fraud. Hoping to find a cure for what ails them,
improve their well-being, or just look better, consumers often fall victim to products and devices
that do nothing more than cheat them out of their money, steer them away from useful, proven
treatments, and possibly do more bodily harm than good.
"There's a lot of money to be made," says Bob Gatling, director of the program operations staff
in the Food and Drug Administration's Center for Devices and
Radiological Health. "People want to believe there's something that can cure them."
FDA describes health fraud as "articles of unproven effectiveness that are promoted to improve
health, well being or appearance." The articles can be drugs,devices, foods, or cosmetics for
human or animal use.
FDA shares federal oversight of health fraud products with the Federal Trade Commission. FDA
regulates safety, manufacturing and product labeling, including
claims in labeling, such as package inserts and accompanying literature. FTC regulates
advertising of these products.
Because of limited resources, says Joel Aronson, team leader for the nontraditional drug
compliance team in FDA's Center for Drug Evaluation and Research, the agency's regulation of
health fraud products is based on a priority system that depends on whether a fraudulent
product poses a direct or indirect risk.
When the use of a fraudulent product results in injuries or adverse reactions, it's a direct risk.
When the product itself does not cause harm but its use may keep someone away from proven,
sometimes essential, medical treatment, the risk is indirect. For example, a fraudulent product
touted as a cure for diabetes might lead someone to delay or discontinue insulin injections or
other proven treatments.
While FDA remains vigilant against health fraud, many fraudulent products may escape
regulatory scrutiny, maintaining their hold in the marketplace for some time to lure increasing
numbers of consumers into their web of deceit.
How can you avoid being scammed by a worthless product? Though health fraud marketers have
become more sophisticated about selling their products, Aronson
says, these charlatans often use the same old phrases and gimmicks to gain consumers'
attention--and trust. You can protect yourself by learning some of their techniques.
The following products typify three fraudulent products whose claims prompted FDA to issue
warning letters to the products' marketers, notifying them that their products violated federal
law. Two of the products also were added to FDA's import alert list of unapproved new drugs
promoted in the United States. Products under import alert are barred from entry onto the U.S.
market.
Take a look at these products' promotions. They are rife with the kind of red flags to look out for
when deciding whether to try a health product unknown to you.
Paula Kurtzweil is a member of FDA's public affairs staff.
Tip-Offs to Rip-Offs
Product No. 1: Pure emu oil
FDA determined that a pure emu oil product marketed to treat or cure a wide
range of diseases was an unapproved drug. Its marketer had never submitted
to FDA data to support the product's safe and effective use.
One Product Does It All
" ... extremely beneficial in the treatment of rheumatism, arthritis ... infections ... prostate
problems, ulcers ... cancer, heart trouble, hardening of the
arteries, diabetes and more. ... "
"completely eliminating the gangrene ...
"... antibiotic, pain reliever ... ."
Be suspicious of products that claim to cure a wide range of unrelated diseases--particularly
serious diseases, such as cancer and diabetes. No product can treat
every disease and condition, and for many serious diseases, there are no cures, only therapies to
help manage them.
Cancer, AIDS, diabetes, and other serious diseases are big draws because people with these
diseases are often desperate for a cure and willing to try just about
anything.
Personal Testimonials
"Alzheimer's Disease!!! My husband has Alzheimer. On September 2, 1998 he began eating 1
teaspoon full of ... Pure Emu Oil each day. ... Now (in
just 22 days) he mowed the grass, cleaned out the garage, weeded the flower beds, and we take
our morning walk again. It hasn't helped his memory
much yet, but he is more like himself again!!!"
Personal testimonies can tip you off to health fraud because they are difficult to prove. Often,
says Reynaldo Rodriguez, a compliance officer and health fraud
coordinator for FDA's Dallas district office, testimonials are personal case histories that have been
passed on from person to person. Or, the testimony can be
completely made up.
"This is the weakest form of scientific validity," Rodriguez says. "It's just compounded hearsay."
Some patients' favorable experiences with a fraudulent product may be due more to a remission
in their disease or from earlier or concurrent use of approved
medical treatments, rather than use of the fraudulent product itself.
Quick Fixes
"... eliminates skin cancer in days! ..."
Be wary of talk that suggests a product can bring quick relief or provide a quick cure, especially if
the disease or condition is serious. Even with proven treatments,
few diseases can be treated quickly. Note also that the words "in days" can really refer to any
length of time. Fraud promoters like to use ambiguous language like
this to make it easier to finagle their way out of any legal action that may result.
View this page as it appears in the magazine (34K PDF).
Product No. 2: Over-the-counter transdermal weight-loss patch
FDA issued a warning letter to the marketer of the weight-loss product
described here because it did not have an approved new drug application.
Because of the newness of the dosage form--skin-delivery systems--FDA
requires evidence of effectiveness, in the form of a new drug application,
before the product can be marketed legally.
'Natural'
"Healthy, simple and natural-way to help you lose and control your weight."
Don't be fooled by the term "natural." It's often used in health fraud as an attention-grabber; it
suggests a product is safer than conventional treatments. But the term
doesn't necessarily equate to safety because some plants--for example, poisonous mushrooms--
can kill when ingested. And among legitimate drug products, says
Shelly Maifarth, a compliance officer and health fraud coordinator for FDA's Denver district office,
60 percent of over-the-counter drugs and 25 percent of
prescription drugs are based on natural ingredients.
And, any product--synthetic or natural--potent enough to work like a drug is going to be potent
enough to cause side effects.
Time-Tested or New-Found Treatment
"This revolutionary innovation is formulated by using proven principles of natural health based
upon 200 years of medical science."
Usually it's one or the other, but this claim manages to suggest it's both a breakthrough and a
decades-old remedy.
Claims of an "innovation," "miracle cure," "exclusive product," or "new discovery" or "magical"
are highly suspect. If a product was a cure for a serious disease, it
would be widely reported in the media and regularly prescribed by health professionals--not
hidden in an obscure magazine or newspaper ad, late-night television
show, or Website promotion, where the marketers are of unknown, questionable or nonscientific
backgrounds.
The same applies to products purported to be "ancient remedies" or based on "folklore" or
"tradition." These claims suggest that these products' longevity proves
they are safe and effective. But some herbs reportedly used in ancient times for medicinal
purposes carry risks identified only recently.
Satisfaction Guaranteed
"... Guarantee: If after 30 days ... you have not lost at least 4 pounds each week, ... your
uncashed check will be returned to you ... ."
Here's another red flag: money-back guarantees, no questions asked.
Good luck getting your money back. Marketers of fraudulent products rarely stay in the same
place for long. Because customers won't be able to find them, the
marketers can afford to be generous with their guarantees.
View this page as it appears in the magazine (39K PDF).
Product No. 3: Unapproved weight-loss product marketed as an alternative to a prescription
drug combination
FDA issued an import alert for a Canadian-made weight-loss product whose
claims compared the product with two prescription weight-loss drugs taken off
the market after FDA determined they posed a health hazard.
Promises of Easy Weight Loss
"Finally, rapid weight loss without dieting!"
For most people, there is only one way to lose weight: Eat less food (or fewer high-calorie foods)
and increase activity.
Note the ambiguity of the term "rapid." A reasonable and healthy weight loss is about 1 to 2
pounds a week.
Paranoid Accusations
"Drug companies make it nearly impossible for doctors to resist prescribing their expensive pills
for what ails you ... ."
"It seems these billion dollar drug giants all have one relentless competitor in common they all
constantly fear--natural remedies."
These claims suggest that health-care providers and legitimate manufacturers are in cahoots with
each other, promoting only the drug companies' and medical device
manufacturers' products for financial gain. The claims also suggest that the medical profession
and legitimate drug and device makers strive to suppress unorthodox
products because they threaten their financial standing.
"This [accusation] is an easy way to get consumers' attention," says Marjorie Powell, assistant
general counsel for the Pharmaceutical Research and Manufacturers
of America. "But I would ask the marketers of such claims, 'Where's the evidence?' It would seem
to me that in this country, outside of a regulatory agency it would
be difficult to stop someone from making a claim."
Think about this, too: Would the vast number of people in the health-care field block treatments
that could help millions of sick, suffering patients, many of whom
could be family and friends? "It flies in the face of logic," Barrett says on his Quackwatch
Website.
Meaningless Medical Jargon
"... Hunger Stimulation Point (HSP) ..."
"... thermogenesis, which converts stored fats into soluble lipids ..."
"One of the many natural ingredients is inolitol hexanicontinate."
Terms and scientific explanations such as these may sound impressive and may have an element
of truth to them, but the public "has no way of discerning fact from
fiction," Aronson says. Fanciful terms, he says, generally cover up a lack of scientific proof.
Sometimes, the terms or explanations are lifted from a study published in a reputable scientific
journal, even though the study was on another subject altogether, says
Martin Katz, a compliance officer and health fraud coordinator for FDA's Florida district office.
And chances are, few people will check the original published
study.
"Most people who are taken in by health fraud will grasp at anything," he says. "They're not
going to do the research. They're looking for a miracle."
View this page as it appears in the magazine (75K PDF).
Truth or Dare
The underlying rule when deciding whether a product is authentic or not is to ask yourself: "Does
it sound too good to be true?" If it does, it probably isn't true.
If you're still not sure, check it out: "Look into it--before you put it in your body or on your skin,"
says Reynaldo Rodriguez, a compliance officer and health fraud
coordinator for FDA's Dallas district office.
To check a product out, FDA health fraud coordinators suggest:
Talk to a doctor or another health professional. "If it's an unproven or little-known treatment,
always get a second opinion from a medical specialist,"
Rodriguez says.
Talk to family members and friends. Legitimate medical practitioners should not discourage you
from discussing medical treatments with others. Be wary of
treatments offered by people who tell you to avoid talking to others because "it's a secret
treatment or cure."
Check with the Better Business Bureau or local attorneys generals' offices to see whether other
consumers have lodged complaints about the product or the
product's marketer.
Check with the appropriate health professional group--for example, the American Heart
Association, American Diabetes Association, or the National
Arthritis Foundation if the products are promoted for heart disease, diabetes or arthritis. Many of
these groups have local chapters that can provide you with
various resource materials about your disease.
Contact the FDA office closest to you. Look for the number and address in the blue pages of the
phone book under U.S. Government, Health and Human
Services, or go to www.fda.gov/ora/fed_state/dfsr_activities/dfsr_pas.html on the FDA Website.
FDA can tell you whether the agency has taken action
against the product or its marketer. Your call also may alert FDA to a potentially illegal product
and prevent others from falling victim to health fraud.
--P.K.
Joining Forces to Fight Fraud
Health fraud isn't confined to the United States only. It's worldwide, and to help combat it in
North America, the United States has joined with Canada and Mexico
to share knowledge and coordinate enforcement activities related to fraudulent health products,
services and devices.
In announcing their decision in December 1998 to adopt the Joint Strategies Agreement, the
countries agreed to:
share information on current trends in health fraud
cooperate in detecting health fraud along borders
share information about significant investigations in their country
consider each others' requests to investigate domestic activities and coordinate related
enforcement activities
develop and distribute joint consumer and business education messages about health fraud.
--P.K.
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Powerful Medicines
Dibawah ini ada suatu 'book review' dari Australia yang luar biasa bunyinya:
Book review
(Aust Prescr 2005;28:101)
Powerful medicines: the benefits, risks and costs of prescription drugs.Avorn J.
New York: Alfred A. Knopf; 2004.
448 pages. Price approx. $57
John Marley, Pro Vice-Chancellor, Faculty of Health, University of Newcastle, Newcastle, NSW
Reading this book is like sitting on the side of a hill watching a faulty train full of happy
passengers hurtling towards inevitable catastrophe and being powerless to stop it happening. In
fact it's like watching wreck after wreck take place. In these cases the trains are manufactured by
the pharmaceutical industry, the passengers are the trusting patients and the drivers are the
prescribers who appear blind to the possibility that there could be any danger ahead. The
controllers and signallers are the regulatory authorities who may be in the pay of the train's
manufacturers or dominated by politicians.
The book starts with examples of recent drug catastrophes. It lays out how, particularly in the
USA, the reach of the pharmaceutical industry is everywhere. The authorities, who should be the
guardians of drug safety, are subject to a Congress and Senators in the pay of the industry and
they are guided by professional experts who should be objective, but instead are recipients of
payments and other inducements to support products and launder data. Although we all suspect
this to be the case, the true extent of it is almost beyond comprehension.
The book is a very balanced text as would be expected when the author is one of the world's
foremost pharmacoepidemiologists. It is not all anti-drug or anti-industry, there are sections on
benefits as well as risks and costs. There are sections on policy and on how information about
drugs is collected and used. There is an excellent discussion about the choices society has to
make about how to get the best value from health dollars.
The book has, of course, a heavy focus on the USA. While this may make it of less interest to
readers outside that country, there are many similarities with events here that readers will
recognise. For example, the infiltration of the research agenda by the pharmaceutical industry as
public research funds become more scarce, and the hijacking of postgraduate education in the
same way. We also have medical experts, 'key opinion leaders', who have been subtly bought by
the industry.
My one criticism is the use of American trade names even though generic names are usually, but
inconsistently, given. Although some generic names are cumbersome and not easily recognised,
the international reader will not recognise many of the American names.
The book makes complex topics easily comprehensible. What makes the book so readable,
beyond the voyeuristic fascination of watching tragedy after tragedy unfold, is Avorn's sharp
humour. For example, '... anti-Parkinson drugs are a rough crowd to invite across your bloodbrain
barrier if you don't have to'.
Jerry Avorn is a world expert and also a brave crusader. Anyone who ever prescribes, dispenses
or takes a medication should pause before they do so to read this book. They may make a
different choice as a result.
http://www.iwandarmansjah.web.id