Exhibit 10.30

March 5, 2004

FOURTH AMENDMENT TO AMENDED AND RESTATED CREDIT AND
SECURITY AGREEMENT

        This Amendment, dated as of March 5, 2004, is made by and between MEDTOX
SCIENTIFIC, INC., a Delaware corporation (“Scientific”), MEDTOX LABORATORIES,
INC., a Delaware corporation (“Laboratories”), MEDTOX DIAGNOSTICS, INC., a
Delaware corporation (“Diagnostics”), and CONSOLIDATED MEDICAL SERVICES, INC., a
Delaware corporation (“Consolidated”, and together with Scientific, Laboratories
and Diagnostics, collectively, the “Borrowers”, and each a “Borrower”), and
WELLS FARGO BUSINESS CREDIT, INC., a Minnesota corporation formerly known as
Norwest Business Credit, Inc. (the “Lender”).

Recitals

        The Borrowers and the Lender are parties to an Amended and Restated
Credit and Security Agreement dated as of May 7, 2001 but effective as of March
31, 2001, as amended by a First Amendment to Amended and Restated Credit and
Security Agreement dated as of October 24, 2001, a Second Amendment to Amended
and Restated Credit and Security Agreement dated as of May 10, 2002, and a Third
Amendment to Amended and Restated Credit and Security Agreement dated as of
August 15, 2003 (as so amended, the “Credit Agreement”). Capitalized terms used
in these recitals have the meanings given to them in the Credit Agreement unless
otherwise specified.

        The Borrowers have requested that certain amendments be made to the
Credit Agreement, which the Lender is willing to make pursuant to the terms and
conditions set forth herein.

        NOW, THEREFORE, in consideration of the premises and of the mutual
covenants and agreements herein contained, it is agreed as follows:

        1.        Defined Terms. Capitalized terms used in this Amendment which
are defined in the Credit Agreement shall have the same meanings as defined
therein, unless otherwise defined herein. In addition, Section 1.1 of the Credit
Agreement is amended by adding or amending, as the case may be, the following
definitions:

          “‘2004 Capex Advances’ has the meaning given in Section 2.8.”

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Restated Credit and Security Agreement

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        “‘2004 Capex Note’ means the promissory note of the Borrowers, dated as
of March ___, 2004, payable to the order of the Lender in the original principal
amount $1,500,000 and in substantially the form of Exhibit A to the Fourth
Amendment or any note or notes issued in substitution therefor, as the same may
hereafter be amended, supplemented or restated from time to time.”

 

        “‘Availability’ means the difference of the (i) Borrowing Base and (ii)
the sum of (A) the outstanding principal balance of the Revolving Note and (B)
the L/C Amount.”

 

        “‘Debt Service Coverage Ratio’ means as of any date, the ratio of
(i) the sum of (A) Pre-Tax Net Income, plus (B) year-to-date depreciation
expense, plus (C) year-to-date amortization expense, plus (D) non-cash deferred
compensation to (ii) the sum of (A) Current Maturities of Long Term Debt plus
(B) Unfinanced Capital Expenditures.”

 

        “‘Fourth Amendment’ means that certain Fourth Amendment to Amended and
Restated Credit and Security Agreement by and between the Borrowers and the
Lender dated as of March 5, 2004.

 

        “‘Fourth Amendment Effective Date’ means the date upon which all
conditions set forth in Paragraph 10 of the Fourth Amendment are satisfied.”

          “‘Maturity Date’ means March 31, 2006.”

 

        “‘Management Compensation Plan’ means an annual plan approved by the
Borrowers’ compensation committee.

 

        “‘Term Advance’ means a 2000 Capex Advance, a 2000 Term Advance, a 2001
Capex Advance or a 2004 Capex Advance and “Term Advances” means the 2000 Capex
Advances, the 2000 Term Advances, the 2001 Capex Advances and the 2004 Capex
Advances.”

 

        “‘Term Floating Rate’ means an annual rate equal to the sum of the Prime
Rate plus one and one-half of one percent (1.50%), which annual rate shall
change when and as the Prime Rate changes.”

 

        “‘Term Note’ means the 2000 Term Note, the 2000 Capex Note, the 2001
Capex Note or the 2004 Capex Note and “Term Notes” means the 2000 Term Note, the
2000 Capex Note, the 2001 Capex Note and the 2004 Capex Note.”

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Restated Credit and Security Agreement

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        2.        Capex Advances.

       (a)        Section 2.1(b) is amended to read as follows:

                   (b)        Capex Advances.

               (i)        2000 Capex Advances. Before the date of this
Agreement, the Lender made various term advances to the Borrowers to finance
capital expenditures (the “2000 Capex Advances”), the Borrowers’ obligation to
pay which is evidenced by the 2000 Capex Note. As of the Fourth Amendment
Effective Date, the outstanding principal balance of the 2000 Capex Note was
$827,530.61, with interest paid through February 29, 2004. No Borrower has any
claim, defense or offset to enforcement of the 2000 Capex Note.

               (ii)       2001 Capex Advances. During the period from March 31,
2001 through March 31, 2002, the Lender made various term advances to the
Borrowers to finance capital expenditures (the “2001 Capex Advances”), the
Borrowers’ obligation to pay which is evidenced by the 2001 Capex Note. As of
the Fourth Amendment Effective Date, the outstanding principal balance of the
2001 Capex Note was $660,428.18, with interest paid through February 29, 2004.
No Borrower has any claim, defense or offset to enforcement of the 2001 Capex
Note.

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Restated Credit and Security Agreement

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        3.        2004 Capex Advances. Sections 2.8 and 2.9 of the Credit
Agreement are amended to read as follows:

 

         Section 2.8 2004 Capex Advances. The Lender may, in its sole
discretion, make advances to the Borrowers from time to time, from the Fourth
Amendment Effective Date through December 31, 2004, in an aggregate amount not
to exceed the lesser of $1,500,000 or eighty percent (80%) of the purchase price
(less insurance, freight, delivery, interest, taxes, installation, licenses or
any similar costs or expenses, and less any discounts, rebates, refunds or other
reductions in price) of new Equipment other than leasehold improvements, office
and recordkeeping equipment or furniture (the “2004 Capex Advances”). The
Borrowers’ obligation to pay the 2004 Capex Advances shall be evidenced by the
2004 Capex Note and shall be secured by the Collateral as provided in
Article III. The 2004 Capex Advances are term advances. Any 2004 Capex Advances
that are prepaid may not be reborrowed.

 

         Section 3.1 Requests for 2004 Capex Advances. The Borrowers shall
comply with the following procedures when requesting 2004 Capex Advances:

         (a)        Requests for a 2004 Capex Advance shall be made on an
individual Borrower basis and shall be made in writing, by a person authorized
under Section 2.3, specifying the amount of the 2004 Capex Advance, and the date
it is to be made, which shall be at least five (5) Banking Days after the date
of the request. The Borrowers shall be obligated to repay all 2004 Capex
Advances notwithstanding the fact that the Person requesting the same was not in
fact authorized to do so. Any request for a 2004 Capex Advance shall be deemed
to be a representation by the Borrowers that the conditions set forth in Section
4.2 have been met as of the time of the request.

         (b)        Each request shall be accompanied by (i) the actual invoice
and purchase order for the newly acquired Equipment, (ii) a description of such
Equipment, (iii) evidence of (A) delivery of such Equipment to the applicable
Borrower and its acceptance by the applicable Borrower, (B) title to such
Equipment in the name of the applicable Borrower, (C) payment therefor or a
letter from the applicable Borrower directing the Lender to disburse the 2004
Capex Advance proceeds to the Equipment vendor directly, (D) the Lender’s first
priority security interest in such Equipment, (E) insurance on such Equipment in
form and substance acceptable to the Lender; and (iv) such other documentation
or information as the Lender may require.

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Restated Credit and Security Agreement

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         (c)        Upon the Lender’s determination to make a 2004 Capex
Advance, the Lender shall disburse the amount of the 2004 Capex Advance by
crediting the same to the demand deposit account of the applicable Borrower, as
specified in Section 2.2, unless the applicable Borrower and the Lender shall
agree in writing to another manner of disbursement.

        4.        Payment on Term Notes. Section 2.10(d) is hereby added to the
Credit Agreement:

 

         (d)        2004 Capex Note.

 

            (i)       The amount of each 2004 Capex Advance shall be due and
payable beginning on the first day of the first month after the date on which
that 2004 Capex Advance is made, and continuing on the first day of each month
thereafter, in substantially equal monthly installments in an amount sufficient
to fully amortize the principal balance of that 2004 Capex Advance in 48 equal
monthly installments; the principal amount to be paid each month on the 2004
Capex Note shall be the sum of such monthly installments; and”

            (ii)       On the Termination Date, the entire unpaid principal
balance of the 2004 Capex Note, and all unpaid interest accrued thereon, shall
be due and payable in full.

        5.        Termination and Prepayment Fees. Section 2.17 is amended by
amended subsections (a) and (b) to read as follows:

 

           (a)       Termination Fees. If the Credit Facility is terminated for
any reason as of a date other than the Maturity Date, the Borrowers shall pay
the Lender a fee equal to one percent (1%) of the Maximum Line.

           (b)        Prepayment Fees. If the Term Advances are prepaid for any
reason, the Borrowers shall pay to the Lender a fee equal to one percent (1%) of
the amount prepaid.

        6.        Financial Covenants. Sections 6.13, 6.14 and 7.10 are amended
to read as follows:

 

           “Section 6.13 Minimum Debt Service Coverage Ratio. The Borrowers will
maintain, on a consolidated basis, during the fiscal year 2004, their Debt
Service Coverage Ratio, determined as at the end of such fiscal year, at not
less than 1.10 to 1.00.

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Restated Credit and Security Agreement

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           “Section 6.14 Minimum Pre-Tax Net Income. The Borrowers will achieve,
on a consolidated basis, during each year-to-date period described below,
Pre-Tax Net Income of not less than the amount set forth opposite such date:

Date

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Minimum Pre-Tax Net
Income

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March 31, 2004 $              0 June 30, 2004 $   650,000 September 30, 2004
$1,650,000 December 31, 2004 $2,000,000 March 31, 2005 $              0

 

           “Section 7.10 Capital Expenditures. During each fiscal year-to-date
period described below, the Borrowers and their Subsidiaries will not incur or
contract to incur in the aggregate, Capital Expenditures of more than the amount
set forth opposite such period:

Year-to-date period ending

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Capital Expenditures

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March 31, 2004 $1,750,000 June 30, 2004 $3,000,000 September 30, 2004 $3,500,000
December 31, 2004 $3,500,000

        7.        Section 7.17 is amended to read as follows:

        “Section 7.17 Salaries. The Borrowers will not pay excessive or
unreasonable salaries, bonuses, commissions, consultant fees or other
compensation; or increase the salary, bonus, commissions, consultant fees or
other compensation of any directors, shareholders owning 10% or more of the
stock, consultant, or any member of their families, by more than 15% in any one
year, either individually or for all such persons in the aggregate, or pay any
such increase from any source other than profits earned in the year of payment;
provided, however, that the Borrowers are permitted to pay annual cash bonuses
pursuant to the Management Compensation Plan provided that no Default of Event
of Default exists or will occur as a result of such payments.

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Restated Credit and Security Agreement

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       8.        Consent to Payment of Subordinated Debt. Pursuant to the terms
of the 10% Private Placement Subordinated Notes listed on Exhibit C to this
Amendment (the “Subordinated Notes”), payment of principal and interest on the
Subordinated Notes is subordinated to payment of the Obligations under the
Credit Agreement, and the Borrower is required to make full payment of the
Obligations under the Credit Agreement prior to any payment of principal and
interest on the Subordinated Notes. Notwithstanding the foregoing, upon receipt
from the Borrowers of a certificate in the form of Exhibit B stating that there
are no Defaults or Events of Default under the Credit Agreement for the period
ending September 30, 2004, the Lender consents to the Borrowers’ payment of all
principal and interest on the Subordinated Notes, provided that (a) no Default
or Event of Default exists or will occur as a result of such payment and (b)
Availability shall not be less than $750,000 after such payment.

       9.        Changes to Exhibits. Exhibit B to the Credit Agreement is
replaced by Exhibit B to this Amendment.

       10.      No Other Changes. Except as explicitly amended by this
Amendment, all of the terms and conditions of the Credit Agreement shall remain
in full force and effect and shall apply to any advance or letter of credit
thereunder.

       11.      Amendment Fee. The Borrower shall pay the Lender as of the date
hereof a fully earned, non-refundable fee in the amount of $10,000 in
consideration of the Lender’s execution and delivery of this Amendment.

       12.      Conditions Precedent. This Amendment shall be effective when the
Lender shall have received an executed original hereof, together with each of
the following, each in substance and form acceptable to the Lender in its sole
discretion:

            (a)        The 2004 Capex Note, duly executed on behalf of the
Borrowers.

            (b)        A Certificate of the Secretary of each Borrower
certifying as to (i) the resolutions of its board of directors approving the
execution and delivery of this Amendment, (ii) the fact that its articles of
incorporation and bylaws, which were certified and delivered to the Lender
continue in full force and effect and have not been amended or otherwise
modified except as set forth in the Certificate to be delivered, and (iii) that
its officers and agents who have been certified to the Lender, as being
authorized to sign and to act on its behalf continue to be so authorized or
setting forth the sample signatures of each of its officers and agents
authorized to execute and deliver this Amendment and all other documents,
agreements and certificates on its behalf.

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Restated Credit and Security Agreement

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            (c)        Payment of the fee described in Paragraph 11.

            (d)        Such other matters as the Lender may require.

       13.      Representations and Warranties. Each Borrower hereby represents
and warrants to the Lender as follows:

            (a)        Each Borrower has all requisite power and authority to
execute this Amendment and the 2004 Capex Note and to perform all of its
obligations hereunder, and this Amendment and the 2004 Capex Note have been duly
executed and delivered by the Borrower and constitute the legal, valid and
binding obligation of each Borrower, enforceable in accordance with its terms.

            (b)        The execution, delivery and performance by each Borrower
of this Amendment and the 2004 Capex Note have been duly authorized by all
necessary corporate action and do not (i) require any authorization, consent or
approval by any governmental department, commission, board, bureau, agency or
instrumentality, domestic or foreign, (ii) violate any provision of any law,
rule or regulation or of any order, writ, injunction or decree presently in
effect, having applicability to any Borrower, or the articles of incorporation
or by-laws of any Borrower, or (iii) result in a breach of or constitute a
default under any indenture or loan or credit agreement or any other agreement,
lease or instrument to which any Borrower is a party or by which it or its
properties may be bound or affected.

            (c)        All of the representations and warranties contained in
Article V of the Credit Agreement are correct on and as of the date hereof as
though made on and as of such date, except to the extent that such
representations and warranties relate solely to an earlier date.

       14.      No Waiver. The execution of this Amendment and acceptance of any
documents related hereto shall not be deemed to be a waiver of any Default or
Event of Default under the Credit Agreement or breach, default or event of
default under any Security Document or other document held by the Lender,
whether or not known to the Lender and whether or not existing on the date of
this Amendment.

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Restated Credit and Security Agreement

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       15.      Release. Each Borrower hereby absolutely and unconditionally
releases and forever discharges the Lender, and any and all participants, parent
corporations, subsidiary corporations, affiliated corporations, insurers,
indemnitors, successors and assigns thereof, together with all of the present
and former directors, officers, agents and employees of any of the foregoing,
from any and all claims, demands or causes of action of any kind, nature or
description, whether arising in law or equity or upon contract or tort or under
any state or federal law or otherwise, which any Borrower has had, now has or
has made claim to have against any such person for or by reason of any act,
omission, matter, cause or thing whatsoever arising from the beginning of time
to and including the date of this Amendment, whether such claims, demands and
causes of action are matured or unmatured or known or unknown.

       16.      Costs and Expenses. The Borrowers hereby reaffirm their
agreement under the Credit Agreement to pay or reimburse the Lender on demand
for all costs and expenses incurred by the Lender in connection with the Loan
Documents, including without limitation all reasonable fees and disbursements of
legal counsel. Without limiting the generality of the foregoing, the Borrowers
specifically agree to pay all fees and disbursements of counsel to the Lender
for the services performed by such counsel in connection with the preparation of
this Amendment and the documents and instruments incidental hereto. The
Borrowers hereby agree that the Lender may, at any time or from time to time in
its sole discretion and without further authorization by the Borrowers, make a
loan to the Borrowers under the Credit Agreement, or apply the proceeds of any
loan, for the purpose of paying any such fees, disbursements, costs and expenses
and the fee required under paragraph 11 hereof.

       17.      Miscellaneous. This Amendment may be executed in any number of
counterparts, each of which when so executed and delivered shall be deemed an
original and all of which counterparts, taken together, shall constitute one and
the same instrument.

         IN WITNESS WHEREOF, the parties hereto have caused this Amendment to be
duly executed as of the date first written above.

WELLS FARGO BUSINESS CREDIT, INC MEDTOX SCIENTIFIC, INC.   MEDTOX DIAGNOSTICS,
INC   MEDTOX LABORATORIES, INC   CONSOLIDATED MEDICAL SERVICES, INC By s/s
Kimberly Leppanen                               Kimberly Leppanen       Its Vice
President By s/s Richard J. Braun                                      
      Richard J. Braun         Their Chief Executive Officer

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Restated Credit and Security Agreement

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Exhibit A to Fourth Amendment to Amended and
Restated Credit and Security Agreement

2004 CAPEX NOTE

$1,500,000 Minneapolis, Minnesota   March 5, 2004

        For value received, the undersigned, MEDTOX SCIENTIFIC, INC., a Delaware
corporation, MEDTOX LABORATORIES, INC., a Delaware corporation, MEDTOX
DIAGNOSTICS, INC., a Delaware corporation, and CONSOLIDATED MEDICAL SERVICES,
INC., a Delaware corporation (together, the “Borrowers”), hereby jointly and
severally promise to pay as provided in the Credit Agreement (defined below), to
the order of WELLS FARGO BUSINESS CREDIT, INC., a Minnesota corporation (the
“Lender”), at its main office in Minneapolis, Minnesota, or at any other place
designated at any time by the holder hereof, in lawful money of the United
States of America and in immediately available funds, the principal sum of One
Million Five Hundred Thousand Dollars ($1,500,000) or, if less, the aggregate
unpaid principal amount of all 2004 Capex Advances made by the Lender to the
Borrowers under the Credit Agreement together with interest on the principal
amount hereunder remaining unpaid from time to time, computed on the basis of
the actual number of days elapsed and a 360-day year, from the date hereof until
this Note is fully paid at the rate from time to time in effect under the
Amended and Restated Credit and Security Agreement dated as of May 7, 2001 but
effective as of March 31, 2001(as amended to date and as the same may hereafter
be amended, supplemented or restated from time to time, the “Credit Agreement”)
by and among the Lender and the Borrowers. The principal hereof and interest
accruing thereon shall be due and payable as provided in the Credit Agreement.
This Note may be prepaid only in accordance with the Credit Agreement.

        This Note is issued pursuant, and is subject, to the Credit Agreement,
which provides, among other things, for acceleration hereof. This Note is the
2004 Capex Note referred to in the Credit Agreement. This Note is secured, among
other things, pursuant to the Credit Agreement and the Security Documents as
therein defined, and may now or hereafter be secured by one or more other
security agreements, mortgages, deeds of trust, assignments or other instruments
or agreements.

        The Borrowers hereby jointly and severally agree to pay all costs of
collection, including attorneys’ fees and legal expenses in the event this Note
is not paid when due, whether or not legal proceedings are commenced.

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        Presentment or other demand for payment, notice of dishonor and protest
are expressly waived.

  MEDTOX SCIENTIFIC, INC.   MEDTOX LABORATORIES, INC   MEDTOX DIAGNOSTICS, INC  
CONSOLIDATED MEDICAL SERVICES, INC               By s/s Richard J.
Braun                                             Richard J. Braun         Their
Chief Executive Officer

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Exhibit B to Fourth Amendment to Amended
and Restated Credit and Security Agreement

COMPLIANCE CERTIFICATE

To: Kimberly Leppanen   Wells Fargo Business Credit, Inc.     Date:
__________________     Subject: Medtox Scientific, Inc.   Medtox Laboratories,
Inc.   Medtox Diagnostics, Inc.   Consolidated Medical Services, Inc.    

        Financial Statements

        In accordance with our Amended and Restated Credit and Security
Agreement dated as of May 7, 2001, but effective as of March 31, 2001(as amended
to date, the “Credit Agreement”), attached are the financial statements of
MEDTOX Scientific, Inc., MEDTOX Laboratories, Inc., MEDTOX Diagnostics, Inc.,
and Consolidated Medical Services, Inc. (together, the “Borrowers”) as of and
for ________________ (the “Reporting Date”) and the year-to-date period then
ended (the “Current Financials”). All terms used in this certificate have the
meanings given in the Credit Agreement.

        I certify that the Current Financials have been prepared in accordance
with GAAP, subject to year-end audit adjustments, and fairly present the
Borrowers’ financial condition and the results of its operations as of the date
thereof.

        Events of Default. (Check one):

  |_| The undersigned does not have knowledge of the occurrence of a Default or
Event of Default under the Credit Agreement not previously reported to the
Lender.

  |_| The undersigned has knowledge of the occurrence of a Default or Event of
Default under the Credit Agreement and attached hereto is a statement of the
facts with respect thereto.

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        Financial Covenants. I further hereby certify as follows:

      1.        Minimum Debt Service Coverage Ratio. Pursuant to Section 6.13 of
the Credit Agreement, as of the Reporting Date, the Borrowers’ Debt Service
Coverage Ratio was _____ to 1.00 which |_| satisfies |_| does not satisfy the
requirement that such ratio be no less than 1.10 to 1.00 for fiscal year 2004.

      2.        Minimum Pre-Tax Net Income. Pursuant to Section 6.14 of the
Credit Agreement, the Borrowers’ Pre-Tax Net Income for the period ending on the
Reporting Date, was $____________, which |_| satisfies |_| does not satisfy the
requirement that such amount be not less than $_____________ for such period as
set forth in table below:

Date

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Minimum Pre-Tax Net
Income

--------------------------------------------------------------------------------

March 31, 2004 $              0 June 30, 2004 $   650,000 September 30, 2004
$1,650,000 December 31, 2004 $2,000,000 March 31, 2005 $              0

      3.        Capital Expenditures. Pursuant to Section 7.10 of the Credit
Agreement, for the year-to-date period ending on the Reporting Date, the
Borrowers have expended or contracted to expend for Capital Expenditures,
$__________________ in the aggregate which |_| satisfies |_| does not satisfy
the requirement that such expenditures not exceed $_____________ in the
aggregate during such period as set forth below:

Year-to-date period ending

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Capital Expenditures

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March 31, 2004 $1,750,000 June 30, 2004 $3,000,000 September 30, 2004 $3,500,000
December 31, 2004 $3,500,000

      4.        Salaries. As of the Reporting Date, the Borrowers |_| are
|_| are not in compliance with Section 7.17 of the Credit Agreement concerning
salaries.

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        Attached hereto are all relevant facts in reasonable detail to evidence,
and the computations of the financial covenants referred to above. These
computations were made in accordance with GAAP.

  MEDTOX SCIENTIFIC, INC.   MEDTOX LABORATORIES, INC   MEDTOX DIAGNOSTICS, INC  
CONSOLIDATED MEDICAL SERVICES, INC               By s/s Richard J.
Braun                                             Richard J. Braun         Their
Chief Executive Officer

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Exhibit C to Fourth Amendment to Amended
and Restated Credit and Security Agreement

10% PRIVATE PLACEMENT SUBORDINATED NOTES

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