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###### Department of Health and Human Services

###### Food and Drug Administration

          - [Docket No. 2004D-0378]

# AGENCY:

Food and Drug Administration, HHS.

# ACTION:

Notice.

# SUMMARY:

The Food and Drug Administration (FDA) is announcing the availability of a guidance entitled “S7B Nonclinical Evaluation of the Potential for Delayed Ventricular Repolarization (QT Interval Prolongation) by Human Pharmaceuticals.”  The guidance was prepared under the auspices of the International Conference on Harmonisation of Technical Requirements for Registration of Pharmaceuticals for Human Use (ICH). The guidance describes a nonclinical testing strategy for assessing the potential of a test substance to delay ventricular repolarization and includes information concerning nonclinical assays and an integrated risk assessment.  The guidance is intended to facilitate the nonclinical assessment of the effects of pharmaceuticals on ventricular repolarization and proarrhythmic risk.

# DATES:

Submit written or electronic comments on agency guidances at any time.

# ADDRESSES:

                        Submit written comments on the guidance to the Division of Dockets Management (HFA-305), Food and Drug Administration, 5630 Fishers Lane, rm. 1061, Rockville, MD 20852. Submit electronic comments to                         *http://www.fda.gov/​dockets/​ecomments*.  Submit written requests for single copies of the guidance to the Division of Drug Information (HFD-240), Center for Drug Evaluation and Research, Food and Drug Administration, 5600 Fishers Lane, Rockville, MD 20857, or the Office of Communication, Training and Manufacturers Assistance (HFM-40), Center for Biologics Evaluation and Research, Food and Drug Administration, 1401 Rockville Pike, Rockville, MD  20852-1448.  The guidance may also be obtained by mail by calling the Center for Biologics Evaluation and Research (CBER) Voice Information System at 1-800-835-4709 or 301-827-1800. Send one self-addressed adhesive label to assist the office in processing your requests.                    

# FOR FURTHER INFORMATION CONTACT:

*Regarding the guidance*:  John Koerner, Center for Drug Evaluation and Research (HFD-110), Food and Drug Administration, 5600 Fishers Lane, Rockville, MD  20857, 301-594-5338.                    

*Regarding the ICH*:   Michelle Limoli, Office of International Programs (HFG-1), Food and Drug Administration, 5600 Fishers Lane, Rockville, MD 20857, 301-827-4480.                    

# SUPPLEMENTARY INFORMATION:

## I.  Background

In recent years, many important initiatives have been undertaken by regulatory authorities and industry associations to promote international harmonization of regulatory requirements.  FDA has participated in many meetings designed to enhance harmonization and is committed to seeking scientifically based harmonized technical procedures for pharmaceutical development.  One of the goals of harmonization is to identify and then reduce differences in technical requirements for drug development among regulatory agencies.

ICH was organized to provide an opportunity for tripartite harmonization initiatives to be developed with input from both regulatory and industry representatives.  FDA also seeks input from consumer representatives and others.  ICH is concerned with harmonization of technical requirements for the registration of pharmaceutical products among three regions:   The European Union, Japan, and the United States.  The six ICH sponsors are the European Commission; the European Federation of Pharmaceutical Industries Associations; the Japanese Ministry of Health, Labour, and Welfare; the Japanese Pharmaceutical Manufacturers Association; the Centers for Drug Evaluation and Research and Biologics Evaluation and Research, FDA; and the Pharmaceutical Research and Manufacturers of America.  The ICH Secretariat, which coordinates the preparation of documentation, is provided by the International Federation of Pharmaceutical Manufacturers Associations (IFPMA).

The ICH Steering Committee includes representatives from each of the ICH sponsors and the IFPMA, as well as observers from the World Health Organization, Health Canada, and the European Free Trade Area.
      ( print page 61134)    
                    In the                     **Federal Register**                     of September 13, 2004 (69 FR 55163), FDA published a notice announcing the availability of a draft tripartite guidance entitled “S7B Nonclinical Evaluation of the Potential for Delayed Ventricular Repolarization (QT Interval Prolongation) by Human Pharmaceuticals.”  The notice gave interested persons an opportunity to submit comments by December 13, 2004.  In response to a request for additional time to comment, FDA reopened the comment period until February 18, 2005 (70 FR 823, January 5, 2005).                

After consideration of the comments received and revisions to the guidance, a final draft of the guidance was submitted to the ICH Steering Committee and endorsed by the three participating regulatory agencies in May 2005.

The guidance provides guidance on nonclinical assessment of the effects of pharmaceuticals on ventricular repolarization and proarrhythmic risk. The guidance describes a nonclinical testing strategy for assessing the potential of a test substance to delay ventricular repolarization and includes information concerning nonclinical assays and an integrated risk assessment.

This guidance represents the agency's current thinking on this topic.  It does not create or confer any rights for or on any person and does not operate to bind FDA or the public.  An alternative approach may be used if such approach satisfies the requirements of the applicable statutes and regulations.

## II.  Comments

                    Interested persons may submit to the Division of Dockets Management (see                     **ADDRESSES**                    ) written or electronic comments on the guidance at any time.  Submit a single copy of electronic comments or two paper copies of any mailed comments, except that individuals may submit one paper copy.   Comments are to be identified with the docket number found in brackets in the heading of this document. The guidance and received comments may be seen in the Division of Dockets Management above between 9 a.m. and 4 p.m., Monday through Friday.                

## III.  Electronic Access

                    Persons with access to the Internet may obtain the document at                     *http://www.fda.gov/​ohrms/​dockets/​default.htm*,                     *http://www.fda.gov/​cder/​guidance/​index.htm*, or                     *http://www.fda.gov/​cber/​publications.htm*.                

Dated: October 12, 2005.

Jeffrey Shuren,

Assisstant Commissioner for Policy.

[FR Doc. 05-20959 Filed 10-19-05; 8:45 am]

BILLING CODE 4160-01-S