8-K

UNITED STATES 

SECURITIES AND EXCHANGE COMMISSION 

Washington, D.C. 20549 

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the
Securities Exchange Act of 1934

Date of Report (Date of earliest event reported):  April 20, 2006

Shire plc

(Exact name of registrant as specified in its charter)

England and Wales

(State or other jurisdiction of incorporation)

0-29630	98-0484822
(Commission File Number)	(IRS Employer Identification No.)

Hampshire International Business Park, Chineham, Basingstoke,
Hampshire RG24 8EP England

(Address of principal executive offices)	(Zip code)
Registrant’s telephone number, including area code	44 1256 894 000

(Former name or former address, if changed since last report)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2.):

o Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

o Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

o Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

o Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Item 8.01. Other Events

     Shire plc has issued the press release attached as Exhibit 99.01 which is incorporated by reference herein.

Item 9.01. Financial Statements and Exhibits

(c) Exhibits. The following exhibit is filed herewith:

99.01 Press Release dated April 20, 2006

SIGNATURE

     Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

SHIRE PLC
By:	/s/ A C Russell
	Name:	Angus Russell
	Title:	Chief Financial Officer

Dated: April 21, 2006

EXHIBIT INDEX

Number	Description
99.01	Press Release dated April 20, 2006

EX-99.1

	EXHIBIT 99.01
Hampshire International Business Park Chineham Basingstoke Hampshire RG24 8EP United Kingdom Tel +44 (0)1256 894000 Fax +44 (0)1256 894708 www.shire.com
Press Release

Shire Receives Interim Response From FDA on ADDERALL XR^® Citizen Petition

Philadelphia, PA, US and Basingstoke, UK – April 20, 2006 -- Shire plc (LSE: SHP, NASDAQ: SHPGY, TSX: SHQ) announces that on April 20, 2006 it received correspondence from the United States Food and Drug Administration (“FDA”) informing Shire that the FDA has not yet resolved the issues raised in Shire’s pending ADDERALL XR Citizen Petition. The FDA states that due to the complex issues raised requiring extensive review and analysis by the FDA’s officials, a decision cannot be reached at this time. The FDA’s interim response is in accordance with FDA regulations concerning Citizen Petitions.

As previously announced in October 2005, Shire filed a Citizen Petition with the FDA to require more rigorous bioequivalence testing or additional clinical testing for generic or follow-on drug products that reference ADDERALL XR before they can be approved. Compliance with these requested criteria will ensure that generic formulations of ADDERALL XR will be clinically effective and safe.

-ends-

For further information please contact:

Investor Relations	Cléa Rosenfeld (Rest of the World)	+44 1256 894 160
	Brian Piper (North America)	+1 484 595 8252
Media	Jessica Mann (Rest of the World)	+44 1256 894 280
	Matthew Cabrey (North America)	+1 484 595 8248

Registered in England 2883758 Registered Office as above

Notes to editors

SHIRE PLC

Shire’s strategic goal is to become the leading specialty pharmaceutical company that focuses on meeting the needs of the specialist physician. Shire focuses its business on central nervous system, gastrointestinal, general products and human genetic therapies - all being areas in which Shire has a commercial presence. The structure is sufficiently flexible to allow Shire to target new therapeutic areas to the extent opportunities arise through acquisitions. Shire believes that a carefully selected portfolio of products with strategically aligned and relatively small-scale sales forces will deliver strong results. Shire’s strategy is to develop and market products for specialty physicians. Shire’s in-licensing and merger and acquisition efforts are focused on products in niche markets with strong intellectual property protection either in the US or Europe.

For further information on Shire, please visit the Company’s website: www.shire.com.

"SAFE HARBOR" STATEMENT UNDER THE PRIVATE SECURITIES LITIGATION REFORM ACT OF 1995

Statements included herein that are not historical facts are forwarding-looking statements. Such forward-looking statements involve a number of risks and uncertainties and are subject to change at any time. In the event such risks or uncertainties materialize, Shire plc's results could be materially affected. The risks and uncertainties include, but are not limited to: risks associated with the inherent uncertainty of pharmaceutical research, product development, manufacturing and commercialization; the impact of competitive products, including, but not limited to, the impact of those on Shire plc's Attention Deficit and Hyperactivity Disorder ("ADHD") franchise; patents, including but not limited to, legal challenges relating to Shire plc's ADHD franchise; government regulation and approval, including but not limited to the expected product approval dates of SPD503 (ADHD), SPD465 (ADHD), MESAVANCE™ (SPD476) (ulcerative colitis), ELAPRASE™ (I2S) (Hunter syndrome) and NRP104 (ADHD), including its scheduling classification by the Drug Enforcement Administration in the United States; Shire plc's ability to benefit from the acquisition of Transkaryotic Therapies Inc.; Shire plc's ability to secure new products for commercialization and/or development; and other risks and uncertainties detailed from time to time in Shire plc's and its predecessor registrant Shire Pharmaceuticals Group plc's filings with the US Securities and Exchange Commission, including Shire plc's Annual Report on Form 10-K for the year ended December 31, 2005.