Attached files

file filename
10-Q/A - 10-Q/A - Lantheus Medical Imaging, Inc.a2210389z10-qa.htm
EX-10.2 - EX-10.2 - Lantheus Medical Imaging, Inc.a2210389zex-10_2.htm
EX-10.4 - EX-10.4 - Lantheus Medical Imaging, Inc.a2210389zex-10_4.htm
EX-10.5 - EX-10.5 - Lantheus Medical Imaging, Inc.a2210389zex-10_5.htm
EX-31.1 - EX-31.1 - Lantheus Medical Imaging, Inc.a2210389zex-31_1.htm
EX-31.2 - EX-31.2 - Lantheus Medical Imaging, Inc.a2210389zex-31_2.htm
EX-10.6 - EX-10.6 - Lantheus Medical Imaging, Inc.a2210389zex-10_6.htm

QuickLinks -- Click here to rapidly navigate through this document


Exhibit 32.1

CERTIFICATION OF THE CHIEF EXECUTIVE OFFICER AND CHIEF FINANCIAL OFFICER
PURSUANT TO 18 U.S.C. SECTION 1350, AS ADOPTED
BY SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

        Each of the undersigned hereby certifies that to his knowledge the Quarterly Report on Form 10-Q/A for the fiscal quarter ended March 31, 2012 of Lantheus Medical Imaging, Inc. (the "Company") filed with the Securities and Exchange Commission on the date hereof fully complies with the requirements of section 13(a) or 15(d) of the Securities Exchange Act of 1934 and that the information contained in such report fairly presents, in all material respects, the financial condition and results of operations of the Company.

Dated: September 27, 2012

  /s/ Donald R. Kiepert

  Name:   Donald R. Kiepert

  Title:   President and Chief Executive Officer

Dated: September 27, 2012

  /s/ Jeffrey E. Young

  Name:   Jeffrey E. Young

  Title:   Chief Financial Officer

        A signed original of this written statement required by Section 906 has been provided to the Company and will be retained by the Company and furnished to the Securities and Exchange Commission or its staff upon request.




QuickLinks

CERTIFICATION OF THE CHIEF EXECUTIVE OFFICER AND CHIEF FINANCIAL OFFICER PURSUANT TO 18 U.S.C. SECTION 1350, AS ADOPTED BY SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002