'

DrugWonks on Twitter

DrugWonks on Facebook

CMPI Videos


Video Montage of Third Annual Odyssey Awards Gala Featuring Governor Mitch Daniels, Montel Williams, Dr. Paul Offit and CMPI president Peter Pitts


Indiana Governor Mitch Daniels


Montel Williams, Emmy Award-Winning Talk Show Host


Paul Offit, M.D., Chief of the Division of Infectious Diseases and the Director of the Vaccine Education Center at the Children’s Hospital of Philadelphia, for Leadership in Transformational Medicine


CMPI president Peter J. Pitts


CMPI Web Video: "Science or Celebrity"

Social Networks



Please Follow the Drugwonks Blog on Facebook, Twitter, LinkedIn, YouTube & RSS




Add This Blog to my Technorati Favorites
Political Blogs - BlogCatalog Blog Directory

Tabloid Medicine

Please Check out the latest book by
Dr. Robert Goldberg Ph.D.
"Tabloid Medicine"

Check Out CMPI's Book

Physician Disempowerment:
A Transatlantic Malaise

Edited By: Peter J. Pitts
Download the E-Book Version
Here

CMPI Events

Donate

CMPI Reports

Blog Roll

Alliance for Patient Access Alternative Health Practice
AHRP

Better Health
BigGovHealth
Biotech Blog
BrandweekNRX
CA Medicine man
Cafe Pharma
Campaign for Modern Medicines
Carlat Psychiatry Blog
Clinical Psychology and Psychiatry: A Closer Look
Conservative's Forum

Club For Growth
CNEhealth.org

Diabetes Mine
Disruptive Women
Doctors For Patient Care
Dr. Gov
Drug Channels
DTC Perspectives
eDrugSearch
Envisioning 2.0
EyeOnFDA
FDA Law Blog
Fierce Pharma
fightingdiseases.org
Fresh Air Fund
Furious Seasons
Gooznews
Gel Health News
Hands Off My Health
Health Business Blog
Health Care BS
Health Care for All
Healthy Skepticism
Hooked: Ethics, Medicine, and Pharma
Hugh Hewitt
IgniteBlog
In the Pipeline
In Vivo
Instapundit
Internet Drug News
Jaz'd Healthcare
Jaz'd Pharmaceutical Industry
Jim Edwards' NRx
Kaus Files
KevinMD
Laffer Health Care Report
Little Green Footballs
Med Buzz
Media Research Center
Medrants
More than Medicine
National Review
Neuroethics & Law
Newsbusters
Nurses For Reform
Nurses For Reform Blog
Opinion Journal
Orange Book
PAL
Peter Rost
Pharm Aid
Pharma Blog Review
Pharma Blogsphere
Pharma Marketing Blog
Pharmablogger
Pharmacology Corner
Pharmagossip
Pharmamotion
Pharmalot
Pharmaceutical Business Review
Piper Report
Polipundit
Powerline
Prescription for a Cure
Public Plan Facts
Quackwatch
Real Clear Politics
Remedyhealthcare

Shark Report
Shearlings Got Plowed
StateHouseCall.org
Taking Back America
Terra Sigillata
The Cycle
The Catalyst

The Lonely Conservative
TortsProf
Town Hall
Washington Monthly
World of DTC Marketing
WSJ Health Blog
 


FDA marches towards interchangeability

2017-01-17 | Peter Pitts
The FDA’s new draft guidance on interchangeability of biosimilars will require most biosimilars' sponsors to conduct studies showing that switching between a biosimilar and its reference product poses no greater risk than continuing to use the reference product. The guidance recommended designs for switching studies, as well as integrated trials to show that a compound is both biosimilar to and interchangeable with its reference biologic.

Per a report in BioCentury, the agency said it will "generally" require switching studies to show interchangeability between any biological products that are dosed more than once. Switching studies should evaluate pharmacokinetic and pharmacodynamic measures as primary endpoints, while also assessing immunogenicity and safety. The agency specified that the studies should include at least three switches between a reference product and proposed biosimilar; the last switch should be a transition to the proposed biosimilar from its reference product.

FDA emphasized that an imbalance in adverse events or immune responses reported at any point during a switching study will "raise concerns" as to the biologics' interchangeability, because it may be difficult to determine which product caused the event. The agency also encouraged powering studies to accommodate patient dropouts, noting that an imbalance in dropout rates may also suggest that compounds are not interchangeable. The agency encouraged companies to first seek a candidate's approval as a non-interchangeable biosimilar if there is "residual uncertainty regarding interchangeability" based on adverse events. The sponsor could then conduct postmarketing studies to show interchangeability.

FDA suggested a two-part study design for sponsors seeking evidence of both biosimilarity and interchangeability. The agency said that after an appropriate measure of clinically meaningful differences between two biologics, a second stage of an integrated study could re-randomize patients into a switching study. The study should be powered to adequately measure both PK and PD, as well as clinical effectiveness.

The guidance said sponsors seeking to extrapolate data supporting interchangeability to additional indications "need to provide sufficient scientific justification" that addresses factors such as immunogenicity risk, PK and mechanism of action.

FDA will accept comments on the draft guidance through March 19. In a Federal Register notice accompanying the guidance, FDA asked stakeholders to address how the agency should consider additional indications approved for a reference product after approval of its interchangeable product, and if the agency should change or add to its comparability assessments for post-approval manufacturing changes of interchangeable products.