Data Show Lower Dose Associated with Fewer Adverse Events in Healthy
Volunteers
RESEARCH TRIANGLE PARK, N.C., Oct. 12 /PRNewswire-FirstCall/ --
GlaxoSmithKline's (NYSE: GSK) HIV protease inhibitor LEXIVA(R)
(fosamprenavir calcium) may now be administered with 100mg of ritonavir, an
agent that increases, or boosts, the level of protease inhibitors in the
bloodstream.
The U.S. Food and Drug Administration approved once-daily LEXIVA 1400
mg with 100mg of ritonavir in adult patients who had not previously taken a
protease inhibitor (PI). The approval was based on pharmacokinetic data
demonstrating comparable blood plasma levels in healthy volunteers when
LEXIVA was administered with the lower 100mg dose of ritonavir and the
previously approved 200mg dose of ritonavir. This information has been
added to the LEXIVA product label.
LEXIVA is indicated in combination with other antiretrovirals for the
treatment of HIV infections. Ritonavir works with LEXIVA and other protease
inhibitors to boost the medication level in the bloodstream making the
protease inhibitor more effective in suppressing HIV. HIV medicines do not
cure HIV infections/AIDS or prevent passing HIV to others.
"GlaxoSmithKline remains committed to improving patient care by making
dosing options more convenient," said Mark Shaefer, Pharm. D., Director,
Clinical Development at GlaxoSmithKline. "We understand that reducing the
number of pills taken daily is an important consideration for patients
starting HIV treatment."
The data supporting this label change were published in the February
2007 issue of Antimicrobial Agents and Chemotherapy.
LEXIVA Indication Statement and Background
LEXIVA is indicated for the treatment of HIV infection in combination
with other antiretroviral medications. The following points should be
considered when initiating therapy with LEXIVA plus ritonavir (LEXIVA/r) in
protease inhibitor (PI)-experienced patients: the PI-experienced patient
study was not large enough to reach a definitive conclusion that LEXIVA/r
and lopinavir/ritonavir are clinically equivalent. Once-daily
administration of LEXIVA plus ritonavir is not recommended for
PI-experienced patients.
The recommended dosing for LEXIVA is:
-- Therapy naive adults
-- LEXIVA 1400mg twice daily
-- LEXIVA 1400mg once daily plus ritonavir 100mg once daily
-- LEXIVA 1400mg once daily plus ritonavir 200mg once daily
-- LEXIVA 700mg twice daily plus ritonavir 100mg twice daily
-- Protease inhibitor experienced adults
-- LEXIVA 700mg twice daily plus 100mg ritonavir twice daily
LEXIVA was initially approved by the FDA for use in the US in 2003. It
is the first PI to offer flexible dosing options (for PI-naïve patients)
with no food or water restrictions.
Important Safety Information about LEXIVA
HIV medicines do not cure HIV infection/AIDS or prevent passing HIV to
others.
Patients should not take LEXIVA if they have had an allergic reaction
to LEXIVA or AGENERASE(R) (amprenavir). High blood sugar, diabetes or
worsening of diabetes, and bleeding in hemophiliacs have occurred in some
patients taking protease inhibitors. When patients start taking HIV
medicines, their immune system may get stronger and could begin to fight
infections that have been hidden in their body, such as pneumonia, herpes
virus, or tuberculosis. If patients have new symptoms after starting their
HIV medicines, they should tell their doctor. Changes in body fat may occur
in some patients taking antiretroviral therapy. The cause and long-term
health effects of these conditions are not known at this time. Skin rashes
can occur in patients taking LEXIVA. Rarely, rashes were severe or life
threatening. Opportunistic infections can develop when patients have HIV
and their immune system is weak. It is very important that patients see
their healthcare provider regularly while taking LEXIVA to discuss any side
effects or concerns. Most common side effects in clinical studies were
diarrhea, headache, nausea, rash, and vomiting. In most cases, these side
effects did not cause people to stop taking their medicine.
For full prescribing information for LEXIVA, please visit
http://www.LEXIVA.com.
LEXIVA was co-discovered by GlaxoSmithKline and Vertex Pharmaceuticals
Incorporated.
About GlaxoSmithKline
GlaxoSmithKline is one of the world's leading research-based
pharmaceutical and healthcare companies and an industry leader in HIV
research and therapies. The company is engaged in basic research programs
designed to investigate new targets to treat HIV. For full prescribing
information please go to http://www.LEXIVA.com.
GSK's Bridges to Access program can help provide qualified individuals
with access to GSK's antiretroviral medications, as well as help identify
insurance or other support for medications. Patients may be eligible for
this program if they are not eligible for prescription drug benefits
through any other private or public insurer, payer or program. In 2004,
GlaxoSmithKline donated more than $372.5 million worth of prescription
drugs to 475,000 patients. For more information, visit
http://www.bridgestoaccess.gsk.com or call 1-866-PATIENT.
About Vertex
Vertex Pharmaceuticals Incorporated is a global biotechnology company
committed to the discovery and development of breakthrough small molecule
drugs for serious diseases. The Company's strategy is to commercialize its
products both independently and in collaboration with major pharmaceutical
companies. Vertex's product pipeline is focused on viral diseases,
inflammation, autoimmune diseases, cancer, pain and bacterial infection.
Vertex co-discovered the HIV protease inhibitor, LEXIVA, with
GlaxoSmithKline.
US Media Inquiries:
Michael N. Joyner
(919) 483 2839
SOURCE GlaxoSmithKline
 back to top
Related links:
http://www.LEXIVA.com
CONTACT:
Michael N. Joyner, +1-919-483 2839, for
GlaxoSmithKline
|
