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AstraZeneca drug tops Plavix in sickest patients


February 7th, 2010 by admin


Heart attack patients in need of emergency procedures were less likely to suffer further serious cardiovascular events, including death, when given AstraZeneca’s experimental Brilinta blood clot preventer than those who used Plavix, according to a study presented on Sunday.

Importantly, the Brilinta patients also were found to be at no greater risk for major bleeding than those taking Plavix — an encouraging sign for such drugs that work by preventing blood cells called platelets from clumping together.

The lack of increased bleeding risk seen with AstraZeneca’s new medicine could provide comfort that safety was not compromised in order to obtain its greater ability to prevent cardiovascular death, heart attack and stroke for up to a year.

The findings are an important new slice of data from a more than 18,000-patient comparative international trial called PLATO unveiled earlier this year in which Brilinta also proved superior to Plavix, one of the world’s most widely used medicines sold by Bristol-Myers Squibb and Sanofi-Aventis with annual sales of some $9 billion.

Analysts see Brilinta as a potential multibillion-dollar a year seller for AstraZeneca, which plans to file an application seeking U.S. approval later this year.

For the latest data, researchers focused on the 8,430 sickest patients in the PLATO trial — those in the midst of so called ST-elevation heart attacks with total obstruction of at least one coronary artery who were in need of emergency angioplasty and stents to restore blood flow and save heart muscle.

“The results are very clear and actually very consistent with the overall trial results of the larger PLATO trial,” preventing cardiovascular events while not increasing the major bleeding risk, said Dr. Philippe Gabriel Steg, lead investigator of the study that was presented at the American Heart Association scientific meeting in Orlando.

Steg said Brilinta, known chemically as ticagrelor, works much more quickly than Plavix, which could be an advantage in these patients in whom time to performing an artery clearing procedure is crucial.

“Clopidogrel’s drawbacks include slower onset of effectiveness, which is not suited to the need for rapid effect in STEMI (ST-elevation heart attacks),” Steg said, using the chemical name for Plavix.

DEATH REDUCTION

According to the latest findings, 9.3 percent of patients receiving Brilinta suffered cardiovascular death, heart attack or stroke for up to a year, compared with 11 percent in the Plavix group, a statistically significant difference, researchers said.

There was an 18 percent relative reduction in death from any cause at one year in the Brilinta group, they said.

“This sets apart this drug and this study from all other oral agents studied so far,” Steg said.

“In previous trials, other oral agents prevented cardiovascular events, but did not significantly reduce mortality,” added Steg, who said the Astra drug could become “a standard of care” for managing very high risk patients undergoing angioplasty procedures.

He said the survival benefit suggests Brilinta may be protecting patients through mechanisms that are not yet known.

For these sickest heart patients in the study, the benefits seen with Brilinta increased over time, researchers said.

Another advantage demonstrated by Brilinta that could help once it begins competing with one of the world’s top-selling medicines is how quickly its effects wear off.

Researchers said once the medicines are stopped, normal platelet clotting ability returns in fewer days than with the Astra drug, which could provide a real clinical difference in patients in need of more serious invasive procedures in which bleeding is a serious risk.

However, there are a couple of issues potentially standing in Brilinta’s path to swift approval.

As seen in previous Brilinta studies, there was a higher incidence of breathlessness — 12.9 percent versus 8.3 percent with Plavix — that could be a signal of unintended impact on lung function. Steg said that side effect was mild and went away after a few days after the start of treatment.

There also was an as-yet-unexplained lack of benefit over Plavix seen in North American patients, who accounted for about 9 percent of total PLATO subjects but who would represent the most important market for the drug’s future success.

There has been speculation that higher doses of aspirin being taken by U.S. patients in the study could account for the disparity, or that it was merely a statistical fluke.

But it is likely something the U.S. Food and Drug Administration will look at very carefully before making any approval decisions.

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Key information missing from U.S. drug labels


January 31st, 2010 by admin


Drug labels in the United States often omit information showing the severity of side effects or that a medicine is not very effective, two doctors said Wednesday.

The result can be a document skewed toward making a medicine seem safer and more effective than it really is, they wrote in a commentary in the New England Journal of Medicine.

“Much critical information that the Food and Drug Administration has at the time of approval may fail to make its way into the drug label and relevant journal articles,” wrote Drs. Lisa Schwartz and Steven Woloshin of the Dartmouth Institute for Health Policy and Clinical Practice in Hanover, New Hampshire.

The labels are written by the manufacturers and the wording is negotiated with the FDA, which gives final approval.

But key information can be missing, Woloshin said in a telephone interview. “How can I decide if the potential harms of this drug are worth the risk if I don’t know how well the drug works, and vice versa?” he asked.

One example is Sepracor’s four-year-old sleep drug Lunesta, promoted with an advertising campaign that cost $750,000 a day in 2007.

The company generated sales of $600 million last year and became a wholly-owned subsidiary of Dainippon Sumitomoto Pharma Co Tuesday.

The label says, without specifics, that Lunesta was superior to a placebo.

But test results submitted to the FDA showed that in the largest and longest study, “Lunesta patients still met criteria for insomnia and reported no clinically meaningful improvements in next-day alertness or functioning,” Schwartz and Woloshin wrote.

Sepracor responded that more detailed information about its products, beyond what the FDA wants, is always available to healthcare providers who ask for it, including from the company’s scientific staff.

NO IMPROVEMENTS

A similar example is Takeda Pharmaceutical Co’s insomnia drug Rozerem. Its label omitted laboratory data showing it still took 31 minutes, for adults over age 64, and 24 minutes for younger adults to fall asleep once they took the drug, compared with 38 minutes with a placebo.

In addition, volunteers reported “no subjective improvements in total sleep time, sleep quality, or the time it took to fall asleep,” the researchers said. Those data were also omitted from the label.

“Sometimes what gets lost is data on harms,” said Schwartz and Woloshin in their commentary. Novartis’ Zometa, used for cancer patients, had a warning label noting the 8- milligram dose posed a greater risk of kidney damage. But the degree of risk was not explained.

While 19 percent of the people taking the 4-milligram dose died during the study and 19 percent died taking a comparison drug, 33 percent died when given the 8-milligram dose of Zometa.

Seven years passed before the label was changed to explicitly tell doctors not to use the higher dose, but no details were given.

Novartis and Takeda had no immediate comment.

Woloshin said he and his colleagues had come up with a better format to make the scope of the risks and benefits clearer to consumers.

Last year, the FDA’s Risk Advisory Committee voted unanimously to endorse it, he said. They are scheduled to meet with the agency on the issue again next month.

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FDA Approves New Indication for Gardasil to Prevent Genital Warts in Men and Boys


January 24th, 2010 by admin


The U.S. Food and Drug Administration today approved use of the vaccine Gardasil for the prevention of genital warts (condyloma acuminata) due to human papillomavirus (HPV) types 6 and 11 in boys and men, ages 9 through 26.

Each year, about 2 out of every 1,000 men in the United States are newly diagnosed with genital warts.

Gardasil currently is approved for use in girls and women ages 9 through 26 for the prevention of cervical, vulvar and vaginal cancer caused by HPV types 16 and 18; precancerous lesions caused by types 6, 11, 16, and 18; and genital warts caused by types 6 and 11.

HPV is the most common sexually transmitted infection in the United States and most genital warts are caused by HPV infection.

“This vaccine is the first preventive therapy against genital warts in boys and men ages 9 through 26, and, as a result, fewer men will need to undergo treatment for genital warts,” said Karen Midthun, M.D., acting director of the FDA’s Center for Biologics Evaluation and Research.

Gardasil’s effectiveness was studied in a randomized trial of 4,055 males ages 16 through 26 years old. The results showed that in men who were not infected by HPV types 6 and 11 at the start of the study, Gardasil was nearly 90 percent effective in preventing genital warts caused by infection with HPV types 6 and 11.

Studies were conducted to measure the immune response to the vaccine in boys ages 9 through 15. The results showed that the immune response was as good as that found in the 16 through 26 years age group, indicating that the vaccine should have similar effectiveness.

The manufacturer will conduct postmarketing studies to obtain additional information on the safety and effectiveness of Gardasil in boys and men.

Gardasil is given as three injections over a 6-month period. Headache, fever and pain at the injection site, itching, redness, swelling and bruising, were the most common side effects observed.

Gardasil is manufactured by Merck and Company Inc. of Whitehouse Station, N.J.

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Health Tip: Signs You May Have Sinusitis


January 17th, 2010 by admin


Sinusitis refers to inflamed sinuses normally caused by a bacterial, fungal or viral infection, the U.S. National Library of Medicine says.

The agency says these common warning signs may indicate sinusitis:
-Cold symptoms that persist for more than five to seven days.
-Inability to smell, drainage into the back of the throat, or a sore throat.
-Headache and pressure or tenderness in the face — surrounding the eyes and sometimes affecting the teeth.
-Nasal congestion, bad breath or runny nose.
-Coughing, particularly at night.
-Fever, fatigue and general feeling of illness.

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FDA Approves New Treatment for Chronic Lymphocytic Leukemia


January 10th, 2010 by admin


The U.S. Food and Drug Administration today approved Arzerra (ofatumumab) for patients with chronic lymphocytic leukemia (CLL), a slowly progressing cancer of the blood and bone marrow.

Arzerra is approved for patients with CLL whose cancer is no longer being controlled by other forms of chemotherapy.

CLL primarily affects people older than 50 and arises from a group of white blood cells known as B-cells that are part of the body’s immune system. Each year, about 16,000 people are diagnosed with CLL and about 4,400 people die from the disease.

Arzerra is a monoclonal antibody, a type of biotechnology product. Antibodies that occur in nature are produced by the immune system in response to invaders. Arzerra binds to a specific protein found on the surface of both normal and malignant B cells, making the cells more susceptible to immune system attack.

The product was approved under the FDA’s accelerated approval process, which allows earlier approval of drugs that meet unmet medical needs. Products may receive accelerated approval based on a surrogate endpoint, such as a reduction in the size of the tumor or decrease in the number of cancerous white cells or in an enlarged spleen or lymph nodes. These indirect measures for clinical outcomes are considered reasonably likely to predict that the drug will allow patients to live longer or with fewer side effects of a disease.

“The approval of Arzerra illustrates FDA’s commitment to using the accelerated approval process to approve drugs for patients who have limited therapeutic options,” said Richard Pazdur, M.D., director of the Office of Oncology Drug Products in the FDA’s Center for Drug Evaluation and Research.

The accelerated approval process requires further study of the drug. The manufacturer is currently conducting a clinical trial in CLL patients to confirm that the addition of Arzerra to standard chemotherapy delays the progression of the disease.

Arzerra’s effectiveness was evaluated in 59 patients with CLL whose disease no longer responded to the available therapies.

The product’s safety was evaluated in 181 patients in two studies in patients with cancer. Common side effects included a decrease in normal white blood cells, pneumonia, fever, cough, diarrhea, lower red blood cell counts, fatigue, shortness of breath, rash, nausea, bronchitis and upper respiratory tract infections.

The most serious side effects of Arzerra are increased chance of infections, including progressive multifocal leukoencephalopathy (PML), a brain infection that is generally fatal. Patients at high risk for Hepatitis B should be screened before being treated with Arzerra. Patients with evidence of inactive hepatitis should be monitored for re-activation of the infection during and after completing treatment.

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Long-Acting Insulin Works Best for Many Diabetics


January 8th, 2010 by admin


Adding insulin to standard diabetes drugs results in better blood sugar control for many with type 2 diabetes, British researchers report, and the dose and timing of insulin received can make a big difference.

Specifically, a once-a-day, long-acting dose of insulin may be the best approach for patients making the move to insulin therapy, the study found.

Keeping blood sugar under control reduces the risk of complications in type 2 diabetes. But diabetes is also a progressive disease, which disrupts insulin production. Consequently, for many diabetes patients, the drugs used to control blood sugar need to be increased repeatedly and most patients will eventually need to take insulin, the researchers said.

“Any treatment which keeps blood sugar under control will minimize risk of complications, but in the end insulin may be the only effective way of doing this,” explained lead researcher Dr. Rury Holman, a professor of diabetic medicine at the University of Oxford. “The vast majority will need insulin in the longer term.”

The report is published in the Oct. 22 online edition of the New England Journal of Medicine, to coincide with its presentation at the 20th World Diabetes Congress in Montreal. The study received funding from drug maker Novo Nordisk and the nonprofit group Diabetes UK.

For the study, Holman’s team compared different forms of insulin therapy for patients with type 2 diabetes. Insulin treatment can start with a “basal” dose that is long-acting, a “prandial” or mealtime dose of insulin that is short-acting or a so-called biphasic dose, a mixture of both short and long-acting insulin.

However, which of these regimens works best was not clear, Holman said. To find out, the researchers randomly assigned 708 patients to biphasic insulin injections twice a day (NovoMix30), mealtime insulin injections three times a day (NovoRapid) or basal insulin injected once a day (Levemir). All of the formulations are made by Novo Nordisk.

These patients had poor blood sugar control even though they were taking two common oral diabetes medications, metformin and sulfonylurea, the researchers noted.

Three years into the trial, the researchers found that slightly more than 43 percent of the patients taking basal insulin and about 45 percent of the patients taking insulin at mealtime achieved good blood sugar control, compared with about 32 percent of those taking biphasic insulin.

In addition, those on basal insulin had a lower incidence of low blood sugar, a serious side effect of insulin therapy, compared to those on biphasic or mealtime insulin, Holman’s team found. Moreover, patients on basal insulin gained less weight than people on the other two regimens.

“These findings provide clear evidence for people with type 2 that supports starting insulin therapy with a once-a-day basal insulin and subsequently adding a mealtime insulin if glycemic targets are not met,” Holman said.

Dr. Michael Roden, from the Institute for Clinical Diabetology at the German Diabetes Center at Heinrich Heine University Clinics in Dusseldorf, and author of an accompanying journal editorial, said that “you need to do a lot to control blood glucose in type 2 diabetic patients when they need insulin.”

Roden noted that while basal insulin is the place to start insulin therapy in type 2 diabetes, over time, mealtime insulin will need to be added to maintain blood sugar control.

Whether lowering blood sugar with insulin and other medications will prevent complications from diabetes, this study was too short to tell, Roden said. “The study was not powered to analyze the so-called hard endpoints, such as eye complications or, most importantly, cardiovascular problems,” he said.

However, there were fewer deaths among those in the study started on basal insulin, Roden said. “Which is only a hint, but is not a firm conclusion [of the benefit of basal insulin therapy].”

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Insulin-Linked Genes Tied to Body’s Internal Clock


December 30th, 2009 by admin


Genes that regulate insulin in the body also play a role in the timing of the body’s sleep-wake cycle, researchers say, and this finding that could potentially lead to treatments for disorders that arise when circadian rhythms are disrupted.

The insulin-control system, which governs how the body processes sugar, may also reset our internal clock, according to the study published online Sept. 17 in Cell.

“People knew that the clock regulates many different processes, but what they didn’t realize was that when you tweak those processes, it feeds back and alters the clock,” study co-author Steve Kay, dean of the Division of Biological Sciences at the University of California San Diego, said in a university news release.

“What came out very strongly was this close relationship between circadian regulation and insulin signaling,” Kay explained. “There’s a reciprocal relationship between circadian dysfunction and metabolic dysfunction.”

According to Kay, mice with malfunctioning internal clocks get fat and develop diabetes. Chronic jetlag may cause similar problems in people, he noted.

“Understanding this close relationship between circadian regulation and metabolic homeostasis should provide novel ways of identifying new therapies for metabolic disease,” Kay said.

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More Teens Getting Needed Vaccines


December 23rd, 2009 by admin


While vaccination rates for adolescents in the United States are gaining ground, there is still a long way to go to meet Healthy People 2010 goals of 90 percent coverage, a new government report shows.

For the first time, the Healthy People goal was met for measles-mumps-rubella and Hepatitis B vaccinations among teens aged 13 to 15.

But vaccination rates for the three vaccines recommended for teens — which cover meningitis, cervical cancer and tetanus-diphtheria-whooping cough — hover at less than 50 percent. In fact, only three states, Arizona, New Hampshire and New York, had vaccination rates over 50 percent, according to the U.S. Centers for Disease Control and Prevention.

Vaccination rates for those three teen vaccines are increasing throughout the country, although there are substantial differences in the rates among states and local areas, according to the report in the Sept. 18 issue of the CDC’s Morbidity and Mortality Weekly Report.

“Coverage among teenagers for the three routinely recommended vaccines is increasing nicely, but we still have a long way to go to reach our national objective,” said Dr. Lance Rodewald, director of immunization services at the CDC.

Although there are racial and economic disparities in many areas of health care, vaccines for children is not one of them, Rodewald said.

“If you look across race and ethnicity, by vaccine, by coverage, there aren’t a lot of disparities in coverage, so that’s quite good to see,” Rodewald said.

“In fact, for HPV vaccine (human papillomavirus, which causes cervical cancer), the below-poverty rates are higher than the above-poverty rates,” he said.

Nationally, vaccination rates for the three most recommended adolescent vaccinations and one childhood vaccination increased from 2007 to 2008.

Specifically, coverage for the MCV4, the meningococcal conjugate vaccine for meningitis, rose from 32.4 percent to 41.8 percent, and rates for Tdap, the tetanus-diphtheria-pertussis vaccine, jumped from 30.4 percent to 40.8 percent.

The rate for one or more doses of HPV vaccine, which protects women from cervical cancer, increased (from 25.1 percent to 37.2 percent). And the number getting two doses of VAR — Varicella vaccine among those without disease history — nearly doubled (from 18.8 percent to 34.1 percent), the CDC reports.

Rodewald said that more needs to be done to get vaccine coverage where it should be. For new vaccines, such as the HPV vaccination, it can take up to 10 years for coverage to reach 90 percent.

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More Whole Grains May Mean Less Fat


December 16th, 2009 by admin


Eating more whole-grain foods may help reduce body fat in older adults, says a new U.S. study.

The study looked at the eating habits — including the consumption of whole-grain bread, brown rice, popcorn and other whole grains as well as fruits and vegetables — of 177 men and 257 women, who averaged 68 years old.

Overall, the participants consumed relatively low amounts of whole-grain foods, averaging 1.5 servings a day, and dietary fiber, averaging 18.6 grams a day. U.S. Department of Agriculture dietary guidelines recommend that older people consume three or more servings daily of whole-grain foods and 21 to 30 grams of dietary fiber a day.

Among the study participants, bread and cold breakfast cereals were the main sources of whole grains, and women were more likely than men to consume whole grains.

After adjusting for factors such as levels of physical activity, the researchers found that a higher intake of whole grains was associated with lower amounts of total body fat and abdominal fat.

People who consumed the highest amounts of whole grains had about 2.4 percent less total body fat and 3.6 percent less abdominal fat than those who ate the least. This difference was found to be related to fiber in cereal, but not in fruits or vegetables. When only cereal fiber was taken into account, those who consumed the most had 3.2 percent less body fat and 5 percent less abdominal fat than those who ate the least amount of cereal fiber.

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