Exhibit 10.12

AMENDMENT

AMENDMENT, dated as of December 22, 2006 (this “Amendment”), to the Credit
Agreement, dated as of September 15, 2006 (as amended, supplemented or modified
from time to time, the “Credit Agreement”), among ROTECH HEALTHCARE INC., a
Delaware corporation (the “Borrower”), the several banks and other financial
institutions or entities from time to time parties to the Credit Agreement (the
“Lenders”), HIGHLAND FINANCIAL CORP., as lead arranger and sole bookrunner, and
NEXBANK, SSB, as collateral agent and as administrative agent.

W I T N E S S E T H:

WHEREAS, the Borrower has requested that certain provisions of the Credit
Agreement be amended upon the terms and subject to the conditions set forth
herein; and

WHEREAS, the Lenders have agreed to such amendments upon the terms and subject
to the conditions set forth herein;

NOW, THEREFORE, in consideration of the premises and mutual covenants contained
herein and in the Credit Agreement, the parties hereto hereby agree as follows:

1. Defined Terms. Unless otherwise defined herein, terms used herein and defined
in the Credit Agreement are used herein as therein defined.

2. Amendment to Section 7.02 (Indebtedness). Section 7.02 is hereby amended by:

(a) (i) deleting the word “and” at the end of Section 7.02(l) and (ii) deleting
“.” at the end of Section 7.02(m) and substituting therefore “; and” ; and

(b) adding a new Section 7.02(n) as follows: “(n) Indebtedness (including,
without limitation, Capital Lease Obligations) of Borrower or any Restricted
Subsidiary pursuant to that certain Term Lease Master Agreement entered into or
to be entered into between IBM Credit LLC and the Borrower (including all
present and future supplements, addenda, amendments and attachments related
thereto), provided, that such Indebtedness shall not exceed an aggregate
principal amount of $3,200,000.00 at any one time outstanding.”

3. Amendment to Section 7.03 (Liens). Section 7.03 is hereby amended by:

(a) (i) deleting the word “and” at the end of Section 7.03(s) and (ii) deleting
“.” at the end of Section 7.03(t) and substituting therefore “; and” ; and

(b) adding a new Section 7.03(u) as follows: “(u) Liens securing Indebtedness of
the Borrower or any Restricted Subsidiary incurred pursuant to Section 7.02(n)
to finance the acquisition of fixed or capital assets, provided that (i) such
Liens shall be created substantially simultaneously with the acquisition of such
fixed or capital assets, (ii) such Liens do not at any time encumber any
property other than the property financed by such Indebtedness and (iii) the
amount of Indebtedness secured thereby is not increased (except in connection
with refinancing premiums and related costs).”

4. Conditions to Effectiveness. This Amendment shall become effective on the
date the Administrative Agent shall have received: (a) an executed counterpart
of this Amendment duly executed and delivered by the Borrower, the Agents and
each of the Required Lenders and (b) an Acknowledgement and Consent in the form
attached hereto as Exhibit A duly executed and delivered by each Guarantor.

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5. Continuing Effect. Except as expressly provided hereby, all of the terms and
provisions of the Credit Agreement and the other Loan Documents are and shall
remain in full force and effect. The amendments, waivers and acknowledgement
contained herein shall not be construed to as an amendment or waiver of any
other provision of the Credit Agreement or the other Loan Documents or for any
purpose except as expressly set forth herein or a consent to any further or
future action on the part of the Borrower that would require the waiver or
consent of the Administrative Agent or the Lenders.

6. Counterparts. This Amendment may be executed by one or more of the parties
hereto in any number of separate counterparts and all of said counterparts taken
together shall be deemed to constitute one and the same instrument. Any executed
counterpart delivered by facsimile transmission shall be effective as for all
purposes hereof.

7. GOVERNING LAW. THIS AMENDMENT AND THE RIGHTS AND OBLIGATIONS OF THE PARTIES
HERETO SHALL BE GOVERNED BY, AND CONSTRUED AND INTERPRETED IN ACCORDANCE WITH,
THE LAWS OF THE STATE OF NEW YORK.

 

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IN WITNESS WHEREOF, the parties hereto have caused this Amendment to be duly
executed and delivered by their proper and duly authorized officers as of the
day and year first above written.

 

ROTECH HEALTHCARE INC. By:        Name:   Title:

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HIGHLAND FINANCIAL CORP.,

as Lead Arranger and Sole Bookrunner

By:        Name:   Title:

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NEXBANK, SSB, as

Administrative Agent

By:        Name:   Title:

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NEXBANK, SSB, as

Collateral Agent

By:        Name:   Title:

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LENDERS: By:        Name:   Title: