A new
injectable drug reduces flare-ups in patients with severe asthma
that is not controlled by steroid inhalers alone, two new trials
show. The drug, benralizumab, is a biologic that works by
killing white blood cells called eosinophils. These are present
in large numbers in such patients, and they have been linked to
severe asthma. If approved by the U.S. Food and Drug
Administration, benralizumab would join two similar drugs --
mepolizumab and reslizumab in fighting hard-to-control asthma.
"We can offer patients who frequently require courses of oral
corticosteroids and have a certain level of eosinophils a very
effective treatment," said by lead researcher. With the right
patient with the right characteristics, the level of asthma
severity can be significantly modified. One potential advantage
of benralizumab is that it can be given less often. The
treatments that we have now are done every two weeks or once a
month, but benralizumab can be given every two months, which may
lower the cost. The available drugs cost about $25,000 to
$30,000 a year and are covered by insurance, including Medicare,
lead researcher added. The current drugs have been approved for
patients aged 12 and older. If you have severe asthma and you're
not getting the control that you need, ask your doctor about
these medications. In the first trial, more than 1,300 patients
aged 12 to 75 were randomly assigned to one of three groups:
benralizumab given every four weeks; benralizumab given every
eight weeks; or a placebo. In addition, the patients continued
to use high-dose inhaled corticosteroids and long-acting beta
agonist’s inhalers to control their asthma. Over 52 weeks, the
researchers found that patients taking benralizumab had a 28
percent to 36 percent reduction in flare-ups, compared with a
placebo. Patients on benralizumab also showed improved lung
function. The most common side effects were cold-like symptoms
in 20 percent of those receiving benralizumab, versus 21 percent
of those on a placebo, and worsening asthma, 12 percent versus
15 percent, respectively. Among patients taking benralizumab,
four suffered serious side effects. One patient had allergic
granulomatous (inflammation of blood vessels), one patient had a
panic attack and one had paresthesia (pins and needles). Among
those receiving the placebo, one had a skin reaction at the site
of the injection. Respiratory disease experts see this new drug
as another breakthrough in treating hard-to-control asthma. |