Showing posts with label FDA. Show all posts
Showing posts with label FDA. Show all posts

Nov 7, 2015

Clinical Trials, Big Pharma, the FDA, and Expen$ive Drugs


...turns out this is not always a great combination for patients
 
Many of us, including this author, are taking one or more of the new and very expensive cancer drugs in our attempt to live longer and have a better quality of life. New and expensive does not necessarily mean we will live longer and better, however. We keep doing this (at least I do) because there is not much in the way of alternatives. We seem to be at the mercy of the most powerful companies in the U.S.

In a new book, Ending Medical Reversal: Improving Outcomes and Saving Lives, Dr. Vinay Prasad looks at ever increasing prices, secretive clinical trial results, questionable procedures, and low drug effectiveness in dozens of the new cancer drugs on the market. Dr. Prasad is an Associate Professor of Medicine at OHSU.

Here are some excerpts from Dr. Prasad’s book in his own words:
"Cancer drugs are outrageously expensive; but they are worth every penny, right?
When you pay a lot for something, you want it to be great. This is true of a new car, a new computer, a new pair of shoes—but it doesn’t seem to be true for cancer drugs.
Recently, we heard that profiteers are raising the price of old, established medicines. For many Americans, Turing pharmaceutical and Martin Shkreli have become four letter words.
But the problem of inappropriate prices is not just a few exceptional cases; it is the norm in cancer medicine.
Before we talk price tag, let’s consider what we get for our money. In medicine, there is always nuance, and it exists here. For example, there are some excellent cancer drugs. Two that come to mind are imatinib—a revolutionary pill that transformed a highly fatal leukemia into a manageable condition—and rituximab—a monoclonal antibody that has improved survival in several cancers. These drugs are expensive, sure, but no one can say they aren’t terrific. But we can say that Novartis, the maker of Gleevec, has raised the price of the drug from an already high $30,000 in 2001 to $76,000 today despite the fact that it costs less than $200 dollars to manufacture a year's supply.
But at least Gleevec is a great drug. Most cancer drugs are not close to being great—they have only a tiny positive impact on longevity and often cause many side effects.
The median improvement in survival for 71 drugs approved by the US Food and Drug Administration for treating solid cancers over the last decade is only 2.1 months. And there are two good reasons to assume that this remarkably short reported extension is in fact an overestimate. First, the average age of cancer patients in the real world is much older than those included in the studies submitted to the FDA —60% of cancer patients are over 65, but they account for just 36% of patients in key trials. Older patients—who are frailer and have other medical problems—experience more side effects from cancer drugs and less benefit.
Second, the majority of cancer drugs approved by the FDA are not included in the 2.1 month figure, because their effects on overall survival are unknown. Amazingly, most new drugs (2/3s) are approved on the basis of improvement of a surrogate endpoint—e.g. a new drug shrinks a tumor on a CT scan. We don't know that this shrinkage actually translates into a longer or a better life.
So, the efficacy of most cancer drugs is minimal and may be even less in the real world. How do we then explain why they are already so ridiculously expensive and increasing in cost at a rate of 10% a year. Cancer drugs now routinely cost more than 100,000 dollars for one year of treatment.
One way doctors measure the value of drugs is to ask how much is the total drug cost to get us 1 year of quality life. Since most drugs just add a few weeks or months, you have to treat many people to get just one year of extra life. By this measure, most cancer drugs are outrageously expensive. A new breast cancer drug costs ~$700,000 for a quality adjusted life year, and a new colon cancer drug costs $900,000. And these figures apply only if you give the drug the benefit of the doubt, and assume it works as well in the real world as it does in FDA studies.
Not surprisingly, Pharma is our most profitable industry—double digit returns ranging from 10% to 42% are routine, despite the overall disappointing benefits of their products.
Reasonable people would say it’s fine to make a tidy profit when you make a great drug—a drug like Gleevec. But we might also say it doesn’t seem fair to keep raising its price over time, as the cost to make it is trivial, and the research and development are already done. Steep price increases feel like profiteering.
Reasonable people might also say that it doesn’t seem right to pay so much for drugs that add so little—and only add that little bit under just right conditions. Especially when the costs to make drugs are so low and profits are so high.
What prevents us from being reasonable people? That is not just a million dollar question, but a tens of billion dollar one. It involves rules that prevent Medicare from negotiating the price of drugs and the intricacies of the patent system. Solutions won’t be simple or easy, but the price of cancer drugs is way too high, and we get far too little for it. The time for reform is now."
As someone who is about to embark on yet another expensive cancer drug experience I applaud Dr. Prasad. I wish him well and hope he can convince enough of the right people (maybe even Congress) to take another look and maybe even take action to decrease drug costs. My life, and many of yours, may depend on it.


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To put a smile on your face see Larry's latest cartoon.
To learn more about clinical trials, take a look at our book.

(c) 2012 Tom Beer and Larry Axmaker

Aug 18, 2014

Back to basics



Since starting this Cancer Clinical Trials blog in 2011, we have covered a lot of materials, provided links, and talked about the latest experimental drugs. We believe that every once-in-a-while it is a good idea to go back and review clinical trial basics.

What is a clinical trial?
Clinical trials are highly organized and complex experiments to test and compare new therapies in human volunteers who may or may not have cancer. Promising treatments go through a series of tests to make sure they are safe, effective, and have minimal side effects. Testing in humans is the only way to find this information. All the Standard Cancer Therapies currently in use were developed and proven effective in clinical trials. Then they were approved for general use by the FDA (U.S. Food and Drug Administration).

Why would you want to participate in a clinical trial?
You may consider joining a clinical trial if no appropriate standard therapy is available; the current standard treatment leaves room for improvement; or because you don’t need treatment right away because your cancer is slow-growing and you would like to try something new.

Many new ideas are being evaluated in clinical trials today--for a broad variety of cancers. Cancer treatment has advanced and improved rapidly in recent years.There are more cancer survivors than ever before. But many experimental cancer drugs and treatments have not yet been tested in humans because there are not enough clinical trial volunteers.

We will continue to provide a variety of information to increase your understanding and maybe even help you make personal health decisions. We welcome your questions and comments. 


To put a smile on your face see Larry's latest cartoon.
To learn more about clinical trials, take a look at our book.

(c) 2012 Tom Beer and Larry Axmaker

Feb 23, 2013

What process does the FDA follow when determining whether to approve a drug?


FDA approval doesn’t actually take as long as most people think.  In a recent blog post, http://www.cancer-clinical-trials.com/2012/07/waiting-for-new-drug-to-be-approved.html we discussed the fact that FDA approval, at an average of 322 days, is actually a little faster than approval in Europe and Canada.  That’s not to say it’s quick, but it does not take years.  What takes a long time are all the studies necessary to collect the information the FDA requires to consider an application.  The FDA uses the “safe and effective” standard.  Effective means that cancer patients benefit in a meaningful way.  This often involves living longer, being cured of cancer, or experiencing quality of life improvements.  The FDA reviews all of the clinical trial data in detail to determine if these standards have been met.  This review takes several months.  While we all want cancer drugs to come to market as quickly as possible, it is also worth remembering that the FDA is held accountable when a drug is approved that later proves unsafe.  It’s a balancing act between moving quickly and dotting the i’s and crossing the t’s.

For more questions and answers about clinical trials, visit the Talk about Health website.
To put a smile on your face see Larry's latest cartoon.
To learn more about clinical trials, take a look at our book.

(c) 2012 Tom Beer and Larry Axmaker

Oct 12, 2012

Some Vaccines Have Been Approved to Prevent Cancer-Causing Infections


Several cancervaccines are currently in use and many, many more are in the experimental stage in clinical trials. Cancer vaccines boost the body’s natural ability to protect itself through the immune system.

The U.S. Food and Drug Administration (FDA) has approved two types of preventive cancer vaccines. One vaccine was designed to prevent Hepatitis B (which can lead to liver cancer) and another to prevent human papillomavirus types 16 and 18 (HPV) infection and effectively prevents about 70 percent of cervical cancer.

And just recently (2010) the FDA approved a vaccine designed to treat (as opposed to prevent) metastatic prostate cancer in men. It has been used successfully to lengthen survival. Named sipuleucel-T (Provenge®), it is individualized to each patient by using immune cells from the patient’s body.

Cancer vaccines may lead to major improvements in cancer treatment in the future. Some studies to date have shown positive results and some have not.

If you are interested in clinical trials for cancer vaccines, check out the list offered on the NCI Factsheet on Cancer Vaccines.

Sep 14, 2012

KOIN TV visits about a new drug for prostate cancer

As part of their Stand Up to Cancer programming, KOIN-TV visited with us a bit ago.  This in an inspiring piece with one of our cancer patients.  We are so glad to see stories like this become a reality.


To put a smile on your face see Larry's latest cartoon.
To learn more about clinical trials, take a look at our book.

(c) 2012 Tom Beer and Larry Axmaker

Aug 31, 2012

Enzalutamide approved - clinical trials deliver

Enzalutamide (formerly MDV-3100) is a drug for advanced prostate cancer that we have mentioned a number of times.  Today, it is no longer experimental.  It is approved and very soon patients with advanced prostate cancer will have another option for treatment.  This is what clinical trials are all about.

The following is a message from the FDA's Office of Hematology and Oncology Products Director, Dr. Richard Pazdur.

On August 31, 2012, the U. S. Food and Drug Administration approved enzalutamide (XTANDI® Capsules, Medivation, Inc. and Astellas Pharma US, Inc.), for the treatment of patients with metastatic castration-resistant prostate cancer who have previously received docetaxel. 

The approval was based on a single randomized, placebo-controlled, multicenter trial enrolling 1199 patients with metastatic castration-resistant prostate cancer who had received prior docetaxel.  Patients were randomly allocated to receive enzalutamide 160 mg orally once daily (N = 800) or placebo (N = 399).  Study treatment continued until disease progression, initiation of new systemic antineoplastic treatment, unacceptable toxicity, or withdrawal.  Patients were required to continue androgen deprivation therapy and were allowed, but not required, to continue or initiate glucocorticoids during the study period.  Forty-eight percent (48%) of patients on enzalutamide and 46% on placebo received glucocorticoids. 

The primary efficacy endpoint was overall survival (OS).  At the pre-specified interim analysis after 520 events, a statistically significant improvement in OS [HR 0.63 (95% CI: 0.53, 0.75), p < 0.0001, log rank test] was observed.  The median OS was 18.4 and 13.6 months in the enzalutamide and placebo arms, respectively.

The most common (>=5%) grade 1-4 adverse reactions included asthenia or fatigue, back pain, diarrhea, arthralgia, hot flush, peripheral edema, musculoskeletal pain, headache, upper respiratory infection, muscular weakness, dizziness, insomnia, lower respiratory infection, spinal cord compression and cauda equina syndrome, hematuria, paresthesia, anxiety, and hypertension.  Grade 3-4 adverse reactions were reported in 47% of patients treated with enzalutamide and in 53% of those on placebo.

Seizures occurred in 0.9% of patients on enzalutamide.  No patients on the placebo arm experienced seizures.  In the clinical trial, patients experiencing a seizure were permanently discontinued from therapy.  All seizures resolved.  Patients with a history of seizure, taking medications known to decrease the seizure threshold, or with other risk factors for seizures were excluded from the clinical trial.  The safety of enzalutamide in patients with predisposing factors for seizures is unknown. 

The recommended dose and schedule for enzalutamide is 160 mg orally once daily.

Full prescribing information, including clinical trial information, safety, dosing, drug-drug interactions and contraindications is available at: http://www.accessdata.fda.gov/drugsatfda_docs/label/2012/203415lbl.pdf


To put a smile on your face see Larry's latest cartoon.
To learn more about clinical trials, take a look at our book.

(c) 2012 Tom Beer and Larry Axmaker

Jul 16, 2012

Waiting for the new drug to be approved…

Not all clinical trials end with a successful drug or treatment being approved by the FDA. But when the trial is successful we want the new drug to be available today—if not sooner. It seems like it takes forever for the FDA to review and finally approve a drug, especially if it’s one that might benefit us.

In a study recently published by the New England Journal of Medicine, two researchers from the Yale School of Medicine studied the average time from clinical trial to approval by the FDA in the U.S., the European Medical Agency (EMA), and Health Canada between 2001 and 2010.

Although the average approval time still may seem long, the FDA approval time was more than two months faster than the EMA and more than three months faster than Health Canada.

Average drug approval times:
FDA                            322 days
EMA                           366 days
Health Canada         393 days

Approval agencies around the world are always under pressure to approve potentially successful drugs as soon as possible and many approvals are done in less time than the averages shown here. It is worth noting also that a long approval time may mean that the study results are not as clear cut as it seems and the FDA needs to ask more questions. The other side of the coin, of course, is when a drug may be approved too quickly and then have to be recalled because of risks and problems not known at the time of approval.

To put a smile on your face see Larry's latest cartoon.
To learn more about clinical trials, take a look at our book.
(c) 2012 Tom Beer and Larry Axmaker