FORM 4		UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940	OMB APPROVAL OMB Number: 3235-0287 Expires: December 31, 2014 Estimated average burden hours per response: 0.5
	Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

1. Name and Address of Reporting Person * Medeiros David Jeffrey (Last) (First) (Middle) 1300 NORTH KELLOGG DRIVE, SUITE D (Street) ANAHEIM CA 92807 (City) (State) (Zip)	2. Issuer Name and Ticker or Trading Symbol QUESTCOR PHARMACEUTICALS INC [ QCOR ]	5. Relationship of Reporting Person(s) to Issuer (Check all applicable) Director 10% Owner X Officer (give title below) Other (specify below) EVP and CTO
	3. Date of Earliest Transaction (Month/Day/Year) 08/14/2014
	4. If Amendment, Date of Original Filed (Month/Day/Year)	6. Individual or Joint/Group Filing (Check Applicable Line) X Form filed by One Reporting Person Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock	08/14/2014		D (1)		80,352	D	(1)	0	D
Common Stock	08/14/2014		D (2)		26,687	D	(2)	0	D
Common Stock	08/14/2014		D (3)		13,000	D	(3)	0	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
Stock Option (right to buy)	$ 14.24	08/14/2014		D (4) (5)			2,083	(6)	02/15/2021	Common Stock	2,083	(4) (5)	0	D
Stock Option (right to buy)	$ 35.78	08/14/2014		D (4) (5)			2,500	(7)	02/14/2022	Common Stock	2,500	(4) (5)	0	D

Explanation of Responses:

1. Pursuant to Agreement and Plan of Merger, dated April 5, 2014 (the "Merger Agreement"), by and among Mallinckrodt plc ("Mallinckrodt"), Quincy Merger Sub, Inc. and Questcor Pharmaceuticals, Inc. ("Questcor"), Mallinckrodt acquired Questcor in a merger transaction (the "Merger") which closed at 4:30 p.m. EST, on August 14, 2014 (the "Effective Time"). At the Effective Time, each share of Questcor common stock (except for certain shares defined in the Merger Agreement) converted into the right to receive, without interest, (a) $30.00 in cash and (b) 0.897 of an ordinary share of Mallinckrodt, in exchange for such share of Questcor common stock ("Merger Consideration").

2. Pursuant to terms of the Merger, at the Effective Time, each outstanding Questcor restricted share award (other than any such award subject to performance-based vesting conditions) held by Questcor executive officers converted into a number of restricted Mallinckrodt ordinary shares determined by multiplying the applicable number of restricted shares of Questcor common stock by the Equity Award Exchange Ratio.

3. Pursuant to terms of the Merger, at the Effective Time, each outstanding Questcor restricted share award held by a Questcor executive that is subject to performance-based vesting conditions was cancelled and converted into the right to receive Merger Consideration in respect of each share of Questcor common stock underlying the Questcor restricted share award.

4. Pursuant to terms of the Merger, at the Effective Time, each vested Questcor stock option held by Questcor executive officers converted into the right to receive the Merger Consideration with respect to each share of Company common stock subject to such option immediately prior to the effective time of the Merger, net of the applicable exercise price, while each unvested Questcor stock option held by Questcor executive officers converted into an option to acquire, on the same terms and conditions as were applicable to such option immediately prior to the Effective Time, a number of Mallinckrodt ordinary shares determined by multiplying the number of shares of Questcor common stock subject to such option immediately prior to the effective time of the Merger by the Equity Award Exchange Ratio,

5. (Continued from footnote 4) at an exercise price per share of Mallinckrodt ordinary shares (rounded up to the nearest whole cent) equal to the quotient obtained by dividing (x) the exercise price per share of Questcor common stock of such Questcor stock option by (y) the Equity Award Exchange Ratio.

6. The stock option is exercisable as it vests - 25% of the shares subject to the stock option vest on the first anniversary of the grant date, while the remaining 75% of the shares vest in equal monthly installments over the following 36 months, so that all of the shares become fully vested on the fourth anniversary of the grant date of February 16, 2011.

7. The stock option is exercisable as it vests - 25% of the shares subject to the stock option vest on the first anniversary of the grant date, while the remaining 75% of the shares vest in equal monthly installments over the following 36 months, so that all of the shares become fully vested on the fourth anniversary of the grant date of February 15, 2012.

	/s/ David J. Medeiros	08/18/2014
	** Signature of Reporting Person	Date
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