<PAGE>

                                                                   EXHIBIT 10.11

                             MEDI-JECT CORPORATION

                             EMPLOYMENT AGREEMENT

     THIS AGREEMENT, dated as of May 1, 2000, by and between Medi-Ject
Corporation, a Minnesota corporation (the "Company"), and Lawrence M. Christian,
an individual resident of Ramsey County in the State of Minnesota ("Executive").

     WHEREAS, the Company wishes to employ Executive to render services for the
Company on the terms and conditions set forth in this Agreement, and Executive
wishes to be retained and employed by the Company on such terms and conditions.

     NOW, THEREFORE, in consideration of the premises and the respective
undertakings of the Company and Executive set forth below, the Company and
Executive agree as follows:

1.   Employment.  The Company hereby employs Executive, and Executive accepts
     ----------
     such employment and agrees to perform services for the Company, for the
     period and upon the other terms and conditions set forth in this Agreement.

2.   Term.  Unless terminated at an earlier date in accordance with Section 9 of
     ----
     this Agreement, the term of Executive's employment hereunder shall be for a
     period commencing on the date of this Agreement and continuing as set forth
     in the Term and Compensation Addendum applicable to each year.

3.   Position and Duties.
     -------------------

     3.01 Service with Company.  During the term of this Agreement, Executive
          --------------------
          agrees to perform such reasonable employment duties as the Board of
          Directors of the Company shall assign to him from time to time. As of
          the date of this Agreement, Executive has been elected to serve as
          Vice President, Finance and Administration/ Chief Financial
          Officer/Secretary/Treasurer of the Company, with responsibility for
          managing the financial and administrative affairs of the Company.

     3.02 Performance of Duties.  Executive agrees to serve the Company
          ---------------------
          faithfully and to the best of his ability and to devote his full time,
          attention and efforts to the business and affairs of the Company
          during the term of this Agreement. Executive hereby confirms that,
          other than as set forth herein, he is under no contractual commitments
          inconsistent with his obligations set forth in this Agreement, and
          that for the term of this Agreement, he will not render or perform
          services for any other corporation, firm, entity or person that are
          inconsistent with the provisions of this Agreement.
<PAGE>

4.   Compensation.
     ------------

     4.01 Salary.  Compensation shall be set by the Board of Directors subject
          ------
          to adjustment annually by same Board of Directors and subject to any
          additional incentive(s) and/or bonus(es) approved by same Board of
          Directors as set out annually in the Term and Compensation Addendum
          applicable to each year.

     4.02 Participation in Benefit Plans.  Executive shall also be entitled to
          ------------------------------
          participate in all employee benefit plans or programs (including
          vacation time) of the Company to the extent that his position, title,
          tenure, salary, age, health and other qualifications make him eligible
          to participate. The Company does not guarantee the adoption or
          continuance of any particular employee benefit plan or program during
          the term of this Agreement, and Executive's participation in any such
          plan or program shall be subject to the provisions, rules and
          regulations applicable thereto.

     4.03 Expenses.  The Company will pay or reimburse Executive for all
          --------
          reasonable and necessary out-of-pocket expenses incurred by him in the
          performance of his duties under this Agreement, subject to the
          presentment of appropriate vouchers in accordance with the Company's
          normal policies for expense verification.

5.   Confidential Information.  Except as permitted or directed by the Company's
     ------------------------
     Board of Directors, during the term of this Agreement and for a period of
     five years thereafter, Executive shall not divulge, furnish or make
     accessible to anyone or use in any way (other than in the ordinary course
     of the business of the Company) any confidential or secret knowledge or
     information of the Company which Executive has acquired or become
     acquainted with or will acquire or become acquainted with prior to the
     termination of the period of his employment by the Company (including
     employment by the Company or any affiliated companies prior to the date of
     this Agreement), whether developed by himself or by others, concerning any
     trade secrets, confidential or secret designs, processes, formulae, plans,
     devices or material (whether or not patented or patentable) directly or
     indirectly useful in any aspect of the business of the Company, any
     customer or supplier lists of the Company, any confidential or secret
     development or research work of the Company, or any other confidential
     information or secret aspects of the business of the Company. Executive
     acknowledges that the above-described knowledge or information constitutes
     a unique and valuable asset of the Company and represents a substantial
     investment of time and expense by the Company and its predecessors, and
     that any disclosure or other use of such knowledge or information other
     than for the sole benefit of the Company would be wrongful and would cause
     irreparable harm to the Company. Both during and after the term of this
     Agreement, Executive will refrain from any acts or omissions that would
     reduce the value of such knowledge or information to the Company. The
     foregoing obligations of confidentiality, however, shall not apply to any
     knowledge or information which is now published or which subsequently
     becomes generally publicly known in the form in
<PAGE>

     which it was obtained from the Company, other than as a direct or indirect
     result of the breach of this Agreement by Executive.

6.   Ventures.  During the term of this Agreement, it is anticipated that
     --------
     Executive will be engaged in or associated with the planning and
     implementing of projects, programs and ventures involving the Company and
     third parties, and Executive hereby expressly acknowledges and agrees that
     all rights in such projects, programs and ventures shall belong to the
     Company. Except as formally approved by the Company's Board of Directors,
     Executive shall not be entitled to any interest in such projects, programs
     and ventures or to any commission, finder's fee or other compensation in
     connection therewith, other than the salary and compensation to be paid to
     Executive as provided in this Agreement, described in Section 4.01 of this
     Agreement.

7.   Noncompetition and Nonsolicitation Covenants.
     --------------------------------------------

     7.01 Agreement Not to Compete.  Executive agrees that, during the term of
          ------------------------
          his employment by the Company he shall not, directly or indirectly,
          engage in competition with the Company in any manner or capacity
          (e.g., as an advisor, principal, agent, partner, officer, director,
          stockholder, employee, member of any association, or otherwise) in any
          phase of the business that the Company is conducting during the term
          of this Agreement, including the design, development, manufacture,
          distribution, marketing, leasing or selling of accessories, devices,
          or systems related to the products or services being sold by the
          Company.

     7.02 Geographic Extent of Covenant.  The obligations of Executive under
          -----------------------------
          Section 7.01 shall apply to any geographic area in which the Company:

          (a)  has engaged in business during the term of this Agreement through
               production, promotional sales or marketing activity, or
               otherwise; or

          (b)  has otherwise established its goodwill, business reputation, or
               any customer or supplier relations.

     7.03 Limitation on Covenant.  Ownership by Executive, as a passive
          ----------------------
          investment, of less than one percent (1%) of the outstanding shares
          of capital stock of any corporation listed on a national securities
          exchange or publicly traded in the over-the-counter market shall not
          constitute a breach of this Section 7.

     7.04 Nonsolicitation and Noninterference.  During the term of this
          -----------------------------------
          Agreement and for a period of two years thereafter, Executive shall
          not:

          (a)  induce or attempt to induce any employee of the Company to leave
               the employ of the Company, or in any way interfere adversely with
               the relationship between any such employee and the Company;
<PAGE>

          (b)  induce or attempt to induce any employee of the Company to work
               for, render services to, provide advise to or supply confidential
               business information or trade secrets of the Company to any third
               person, firm or corporation; or

          (c)  induce or attempt to induce any customer, supplier, licensee,
               licensor or other business relation of the Company to cease doing
               business with the Company, or in any way interfere with the
               relationship between any such customer, supplier, licensee,
               licensor or other business relation and the Company.

     7.05 Indirect Competition and Interference.  Executive further agrees that,
          -------------------------------------
          during the term of this Agreement and, solely with respect to Section
          7.04, the period covered by Section 7.04, he will not, directly or
          indirectly, assist or encourage any other person in carrying out,
          directly or indirectly, any activity that would be prohibited by the
          above provisions of this Section 7 if such activity were carried out
          by Executive, either directly or indirectly; and, in particular,
          Executive agrees that he will not, directly or indirectly, induce any
          employee of the Company to carry out, directly or indirectly, any such
          activity.

8.   Patent and Related Matters.
     --------------------------

     8.01 Disclosure and Assignment.  Executive will promptly disclose in
          -------------------------
          writing to the Company complete information concerning each and every
          invention, discovery, improvement, device, design, apparatus,
          practice, process, method or product, whether patentable or not, made,
          developed, perfected, devised, conceived or first reduced to practice
          by Executive, either solely or in collaboration with others, during
          the term of this Agreement, or within six months thereafter, whether
          or not during regular working hours, relating either directly or
          indirectly to the business, products, practices, or techniques of the
          Company (hereinafter referred to as "Developments"). Executive, to the
          extent that he has the legal right to do so, hereby acknowledges that
          any and all of said Developments are the property of the Company and
          hereby assigns and agrees to assign to the Company any and all of
          Executive's right, title and interest in and to any and all of such
          Developments. Without limiting the foregoing, any and all original
          works of authorship which are created by Executive (solely or jointly
          with others) within the scope of Executive's employment and which are
          protectable by copyright law shall be deemed "works made for hire," as
          that term is defined in the U.S. Copyright Act (17 U.S.C. Section
          101).

     8.02 Future Developments.  As to any future Developments made by Executive
          -------------------
          that relate to the business, products or practices of the Company and
          that are first conceived or reduced to practice during the term of
          this Agreement, or within six months thereafter, but that are claimed
          for any reason to belong to an entity or person other than the
          Company, Executive will promptly disclose the same in writing to the
          Company and shall not disclose the same to others if the
<PAGE>

          Company, within twenty (20) days thereafter, shall claim ownership of
          such Developments under the terms of this Agreement. If the Company
          makes such claim, Executive agrees that, insofar as the rights (if
          any) of Executive are involved, it will be settled by arbitration in
          accordance with the rules of the American Arbitration Association. The
          locale of the arbitration shall be Minneapolis, Minnesota (or other
          locale convenient to the Company's principal executive offices). If
          the Company makes no such claim, Executive hereby acknowledges that
          the Company has made no promise to receive and hold in confidence any
          such information disclosed by Executive.

     8.03 Limitation on Sections 8.01 and 8.02.  The provisions of Sections 8.01
          ------------------------------------
          and 8.02 shall not apply to any Development meeting the following
          conditions:

          (a)  such Development was developed entirely on Executive's own time;

          (b)  such Development was made without the use of any Company
               equipment, supplies, facility or trade secret information;

          (c)  such Development does not relate:

               (i)  directly to the business of the Company; or
               (ii) to the Company's actual or demonstrable anticipated
                    research;

          (d)  such Development does not result from any work performed by
               Executive for the Company.

     8.04 Assistance of Executive.  Upon request and without further
          -----------------------
          compensation therefor, but at no expense to Executive, and whether
          during the term of this Agreement or thereafter, Executive will do all
          lawful acts, including, but not limited to, the execution of papers
          and lawful oaths and the giving of testimony, that in the opinion of
          the Company, its successors and assigns may be necessary or desirable
          in obtaining, sustaining, reissuing, extending and enforcing United
          States and foreign Letters Patent, including, but not limited to,
          design patents, on any and all of such Developments, and for
          perfecting, affirming and recording the Company's complete ownership
          and title thereto, and to cooperate otherwise in all proceedings and
          matters relating thereto.

     8.05 Records.  Executive will keep complete, accurate and authentic
          -------
          accounts, notes, data and records of all Developments in the manner
          and form requested by the Company. Such accounts, notes, data and
          records shall be the property of the Company, and, upon its request,
          Executive will promptly surrender the same to it or, if not previously
          surrendered upon its request or otherwise, Executive will surrender
          the same, and all copies thereof, to the Company upon the conclusion
          of his employment.
<PAGE>

     8.06 Obligations, Restrictions and Limitations.  Executive understands that
          -----------------------------------------
          the Company may enter into agreements or arrangements with agencies of
          the United States Government, and that the Company may be subject to
          laws and regulations which impose obligations, restrictions and
          limitations on it with respect to inventions and patents that may be
          acquired by it or that may be conceived or developed by employees,
          consultants or other agents rendering services to it. Executive agrees
          that he shall be bound by all such obligations, restrictions and
          limitations applicable to any such invention conceived or developed by
          him during the term of this Agreement and shall take any and all
          further action that may be required to discharge such obligations and
          to comply with such restrictions and limitations.

9.   Termination.
     -----------

     9.01 Grounds for Termination.  This Agreement shall terminate prior to the
          -----------------------
          expiration of the initial term set forth in Section 2 or any extension
          thereof in the event that at any time during the initial term or any
          extension thereof:

          (a)  Executive shall die;

          (b)  the Board of Directors of the Company shall determine that:

               (i)    Executive has become disabled;

               (ii)   Executive had breached this Agreement in any material
                      respect, which breach is not cured by Executive or is not
                      capable of being cured by Executive within thirty (30)
                      days after written notice of such breach is delivered to
                      Executive; or

               (iii)  Executive has engaged in willful and material misconduct,
                      including willful and material failure to perform his
                      duties as an officer or employee of the Company.

Notwithstanding any termination of this Agreement, Executive, in consideration
of his employment hereunder to the date of such termination, shall remain bound
by the provisions of this Agreement that specifically relate to periods,
activities or obligations upon or subsequent to the termination of Executive's
employment.

     9.02 "Disability" Defined. The Board of Directors may determine that
           -------------------
          Executive has become disabled, for the purpose of this Agreement, in
          the event that Executive shall fail, because of illness or incapacity,
          to render services of the character contemplated by this Agreement
          over a period of ninety (90) days during any one hundred and eighty
          (180) day period. The existence or nonexistence of grounds for
          termination because of disability shall be made in good faith by the
          Board of Directors after notice in writing given to Executive at least
          thirty (30) days prior to such determination. During such thirty (30)
          day period, Executive
<PAGE>

            shall be permitted to make a presentation to the Board of Directors
            for its consideration.

     9.03   Surrender of Records and Property.  Upon termination of his
            ---------------------------------
            employment with the Company, Executive shall deliver promptly to the
            Company all records, manuals, books, blank forms, documents,
            letters, memoranda, notes, notebooks, reports, data, tables,
            calculations or copies thereof, which are the property of the
            Company or which relate in any way to the business, products,
            practices or techniques of the Company, and all other property,
            trade secrets and confidential information of the Company,
            including, but not limited to, all documents which in whole or in
            part contain any trade secrets or confidential information of the
            Company, which in any of these cases are in his possession or under
            his control.

10.  Miscellaneous.
     -------------

     10.01  Governing Law.  This Agreement is made under and shall be governed
            -------------
            by and construed in accordance with the laws of the State of
            Minnesota.

     10.02  Prior Agreements.  This Agreement contains the entire Agreement of
            ----------------
            the parties relating to the subject matter hereof and supersedes all
            prior Agreements and understandings with respect to such subject
            matter, and the parties hereto have made no Agreements,
            representations or warranties relating to the subject matter of this
            Agreement which are not set forth herein.

     10.03  Withholding Taxes.  The Company may withhold from any benefits
            -----------------
            payable under this Agreement all federal, state, city or other taxes
            as shall be required pursuant to any law or governmental regulation
            or ruling.

     10.04  Amendments.  No amendment or modification of this Agreement shall be
            ----------
            deemed effective unless made in writing and signed by the parties
            hereto.

     10.05  No Waiver.  No term or condition of this Agreement shall be deemed
            ---------
            to have been waived, nor shall there be any estoppel to enforce any
            provisions of this Agreement, except by a statement in writing
            signed by the party against whom enforcement of the waiver or
            estoppel is sought. Any written waiver shall not be deemed a
            continuing waiver unless specifically stated, shall operate only as
            to the specific term or condition waived and shall not constitute a
            waiver of such term or condition for the future or as to any act
            other than that specifically waived.

     10.06  Severability.  To the extent any provision of this Agreement shall
            ------------
            be invalid or unenforceable, it shall be considered deleted here
            from and the remainder of such provision and of this Agreement shall
            be unaffected and shall continue in full force and effect. In
            furtherance and not in limitation of the foregoing, should the
            duration or geographical extent of, or business activities covered
            by,
<PAGE>

            any provision of this Agreement be in excess of that which is valid
            and enforceable under applicable law, then such provision shall be
            construed to cover only that duration, extent or activities which
            may validly and enforceably be covered. Executive acknowledges the
            uncertainty of the law in this respect and expressly stipulates that
            this Agreement be given the construction which renders its
            provisions valid and enforceable to the maximum extent (not
            exceeding its express terms) possible under applicable law.

     10.07  Assignment.  This Agreement shall not be assignable, in whole or in
            ----------
            part, by either party without the written consent of the other
            party, except that the Company may, without the consent of
            Executive, assign its rights and obligations under this Agreement to
            any corporation, firm or other business entity with or into which
            the Company may merge or consolidate, or to which the Company may
            sell or transfer all or substantially all of its assets, or of which
            50% or more of the equity investment and of the voting control is
            owned, directly or indirectly, by, or is under common ownership
            with, the Company. After any such assignment by the Company, the
            Company shall be discharged from all further liability hereunder and
            such assignee shall thereafter be deemed to be the Company for the
            purposes of all provisions of this Agreement including this Section
            10.

     10.08  Injunctive Relief.  Executive agrees that it would be difficult to
            -----------------
            compensate the Company fully for damages for any violation of the
            provisions of this Agreement, including without limitation the
            provisions of Sections 5, 7, 8 and 9.03. Accordingly, Executive
            specifically agrees that the Company shall be entitled to temporary
            and permanent injunctive relief to enforce the provisions of this
            Agreement and that such relief may be granted without the necessity
            of proving actual damages. This provision with respect to injunctive
            relief shall not, however, diminish the right of the Company to
            claim and recover damages in addition to injunctive relief.

IN WITNESS WHEREOF, Executive and the Company have executed this Agreement as of
the date set forth in the first paragraph.

MEDI-JECT CORPORATION                   EXECUTIVE


By: /s/ Franklin Pass                   /s/ Lawrence M. Christian
    ---------------------------         -------------------------------
        Franklin Pass                       Lawrence M. Christian

Its:    Chairman/CEO
<PAGE>

                    TERM AND COMPENSATION ADDENDUM FOR 2000

                TO AMEND EMPLOYMENT AGREEMENT DATED MAY 1, 2000

                               AS OF MAY 1, 2000


THIS AGREEMENT, effective as of May 1, 2000, by and between Medi-Ject
Corporation, a Minnesota corporation (the "Company") and Lawrence Christian, an
individual resident of the State of Minnesota (the "Executive"),

WHEREAS, the Company and the Executive are parties to an Employment Agreement
dated May 1, 2000 (the "Agreement"), and

PURSUANT to the approval of the Board of Directors on June 5, 2000, and

WHEREAS, the Company and the Executive each wish to agree to the following:

  1. The Agreement term shall begin on May 1, 2000.

  2. The Agreement term shall be for 365 days continuing each day on a rolling
     365-day basis.

  3. Annual base compensation shall be $124,000 beginning May 1, 2000.

  4. A $25,000 cash bonus upon signing a development and distribution agreement
     and/or product and technology rights agreement with either Disetronic or
     Pharmacia & Upjohn.

  5. A bonus payable upon closing a merger agreement with Permatec comprisin two
     (2) parts:

     Part A:   A $12,000 cash bonus upon closing of the merger agreement.
               Subject bonus to be payable 25% at close of business on the next
               business day following the closing day of subject merger and 25%
               payable on the last business day of each of the next three (3)
               successive calendar quarters.

               If employee termination occurs, for any reason, prior to
               completion of the payout schedule, as stated above, all amounts
               are due and payable as of the termination date.

     Part B:   A 5,000 share stock option grant with grant date established as
               closing date of subject merger described above.

All other terms of the Agreement and all amendments applicable thereto are to
remain in full force and effect.


AGREED:

MEDI-JECT CORPORATION:                            EXECUTIVE:


By: /s/ Franklin Pass                             /s/ Lawrence Christian
    ----------------------------------            -----------------------------
        Franklin Pass, Chairman & CEO                 Lawrence Christian

Dated:    5-01-00                                 Dated:   05-01-00
       -------------------------------                   ----------------------