Mark your calendars for "Topical Drug Development -- Evolution of Science and Regulatory Policy," a two-day workshop sponsored by the University of Maryland Center of Excellence in Regulatory Science and Innovation (M-CERSI).

Scheduled for July 29-30, 2019, "Topical Drug Development -- Evolution of Science and Regulatory Policy" will bring together stakeholders from the U.S. Food and Drug Administration (FDA), academia, and industry to discuss the underpinnings of the MUsT program, the successful incorporation of MUsT in drug development, and the utilization of in vitro methods in product development.

Important Event Information
Date: July 29-30, 2019
Time: 8:30 a.m. - 5 p.m.
Location: University of Maryland School of Pharmacy
20 N. Pine Street
Baltimore, MD 21201
Online Registration Available Here

PLEASE NOTE: Individuals desiring to attend in-person (fee-based) MUST pre-register by July 25, 2019, at which time registrations will close and no additional registrations will be allowed. On-site registration will NOT be available. Webinar registration will be open throughout the end of the workshop to accommodate those wishing to dial in remotely.


Poster Session: Poster session is scheduled for July 29, 2019.
Submit your poster title here.

About the Event:

The assessment of dermal absorption in topical drug development is a relative new-comer to clinical pharmacology and pharmacokinetics, in general. This has historically been due to the lack of both sufficient analytical models and standardized assessment protocols. In the early 1990s, the U.S. FDA initiated the development of a “Maximal Usage Study or MUsT” paradigm in the Division of Dermatology and Dental Drug Products (DDDP). This paradigm was designed to both assist in the evaluation of in vivo safety by providing direct assessment of plasma levels following application of topical products, and to provide information on the effects of disease and formulation on dermal penetration.

Since its introduction, the MUsT paradigm has been used in the development program over every topically applied New Drug Application in the U.S. This paradigm has been presented at numerous national and international meetings and has been published by the FDA. Since 2014, with the increased scrutiny of topical antiseptics and sunscreens, the MUsT paradigm has been adopted into the area on non-prescription drug products via both draft and final rules for antiseptics, a safety and effectiveness guidance for sunscreens, and now, the draft and pending final rule for sunscreens. In parallel, in vitro permeation methods have progressed to the point where they can be used, in conjunction with the in vivo MUsT paradigm, as a tool in the successful development of topical drugs.

This symposium will bring together stakeholders from the FDA, academia, and industry to discuss the underpinnings of the MUsT program, the successful incorporation of the MUsT in drug development, and the utilization of in vitro methods in product development. Additionally, data from the recent FDA publication of their pilot sunscreen MUsT program will be discussed along with a discussion as to how this information can be used to augment and improve the development of non-prescription drugs, both under the rubric of an NDA and the Monograph system.

Program Objectives:

  1. To present the background of the current regulatory policy in the area of dermal absorption and its underpinnings.
  2. To provide examples of the successful incorporation of both in vivo (Maximal Usage Trials) and in vitro (percutaneous permeation studies, i.e., IVPT) in drug development.
  3. To facilitate discussion as to the design elements and concerns of both in vivo and in vitro methods in the new drug and over-the-counter drug space.
  4. To stimulate discussion between interested parties in the evolution of science in the area of topical drug development and dermal absorption testing.

Webinar Access:

In addition to the live program held at the School of Pharmacy, "Topical Drug Development -- Evolution of Science and Regulatory Policy" will be broadcasted via a livestream webinar on July 29-30.

Individuals who cannot attend the event in-person, but wish to view the webinar are still required to complete registration for the conference. Registration to view the webinar is free. When registering for the event, select the "Webinar Access Only" ticket. Instructions to access the webinar will be emailed to attendees who select this ticket closer to the event.

Special Accommodations:

If special accommodations at the workshop are needed due to a disability, please email Ann Anonsen at at least seven (7) days in advance of the workshop. Requests for sign language interpretation or Computer Aided Realtime Translation (CART)/captioning should be made two (2) weeks in advance of the workshop, and should be sent directly to the FDA Interpreting Services Staff at

For More Information:

More information about this workshop, including registration, an agenda, and information about how to submit your poster title and parking and directions, is available on this website.

If you have any additional questions about this workshop, please contact