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                                                                  Exhibit 4.29

      THIS FIRST AMENDMENT TO THE SUBSCRIPTION AGREEMENT entered into at the
City of Montreal, Province of Quebec, effective as of October 24, 2002

AMONG:                              SGF SANTE INC., a corporation duly
                                    incorporated pursuant to the laws of the
                                    Province of Quebec, having its head office
                                    at 600 de La Gauchetiere Street West, Suite
                                    1700, Montreal, Quebec, H3B 4L8, acting and
                                    represented herein by Dupuis Angers, its
                                    Vice-President, and by Michel Sainte-Marie,
                                    its Assistant Secretary, duly authorized as
                                    they so declare;

                                    (hereinafter referred to as "SGF Sante")

AND:                                DRAXIS HEALTH INC., a corporation duly
                                    incorporated under the laws of Canada,
                                    having its head office at 6780 Goreway
                                    Drive, Mississauga, Ontario, L4V 1P1, acting
                                    and represented herein by Jim Garner, its
                                    Senior Vice-President, Finance and Chief
                                    Financial Officer, duly authorized as he so
                                    declares;

                                    (hereinafter referred to as the "Draxis
                                    Health")

AND:                                DRAXIS PHARMA INC., a corporation duly
                                    incorporated under the laws of Canada,
                                    having its head office at 1170 Peel Street,
                                    5th Floor, Montreal, Quebec, H3B 4S8, acting
                                    and represented by Jim A.H. Garner, its
                                    President, duly authorized as he so
                                    declares;

                                    (hereinafter referred to as the
                                    "Corporation")

      WHEREAS SGF Sante, Draxis Health and the Corporation entered into a
Subscription Agreement as of March 28, 2002 (the "Subscription Agreement");

      AND WHEREAS the Subscription Agreement provided for an additional
subscription of 1,088,376 Common Shares by SGF Sante and 2,244,957 Common Shares
by Draxis Health which additional subscription was to occur in one tranche at a
date provided for in the Subscription Agreement;

      AND WHEREAS SGF Sante and Draxis Health wish that the additional
subscription should occur instead in three separate and equal tranches;

      AND WHEREAS the parties hereto wish to amend the Subscription  Agreement
to reflect the above decision;

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                                      -2-

      NOW, THEREFORE, the parties agree to amend the Subscription Agreement as
follows:

1.    The preamble is an integral part of this Agreement.

2.    The definitions given to the terms "Additional Subscription", "DHI
      Subscribed Shares", "Second Closing", "SGF Subscribed Shares" and
      "Subscription Price" in section 1.1 of the Subscription Agreement are
      hereby deleted and replaced with the following definitions:

      "ADDITIONAL SUBSCRIPTIONS" has the meaning set forth in section 2.2.

      "DHI SUBSCRIBED SHARES" means the 577,402 Common Shares hereby subscribed
      by Draxis Health which are issued at the Closing and the 2,244,957 Common
      Shares which Draxis Health hereby agrees to subscribe for at the Second
      Closing, the Third Closing and the Fourth Closing.

      "SECOND CLOSING" has the meaning set forth in section 2.2.1

      "SGF SUBSCRIBED SHARES" means the 279,930 Common Shares hereby subscribed
      by SGF Sante which are issued at the Closing and the 1,088,376 Common
      Shares which SGF Sante hereby agrees to subscribe for at the Second
      Closing, the Third Closing and the Fourth Closing.

      "SUBSCRIPTION PRICE" means the aggregate subscription price payable for
      all the subscribed shares, being $1,286,000 at the Closing, $1,666,666 at
      the Second Closing, $1,666,666 at the Third Closing and $1,666,666 at the
      Fourth Closing.

      In addition, the following definitions are added:

      "FOURTH CLOSING" has the meaning set forth in section 2.2.4

      "THIRD CLOSING" has the meaning set forth in section 2.2.3

3.    Section 2.2 of the Subscription Agreement is deleted and replaced with
      the following:

      "2.2.1 SECOND ADDITIONAL SUBSCRIPTION

            On October 24, 2002, (the "Second Closing") Draxis Health and SGF
            Sante hereby agree to subscribe for and to purchase and take up, and
            the Corporation hereby agrees to allot and issue from treasury to
            Draxis Health and SGF Sante, the Common Shares set out below for a
            subscription price of $1.50 per share:

                                                                 Aggregate
             Subscriber               Number of Shares        Subscription Price
            ------------------      --------------------    --------------------
             Draxis Health                748,319               $1,122,478.50

             SGF Sante                    362,792                $544,188.00

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                                      -3-

            The Common Shares issued pursuant to this Second Closing shall
            represent, along with the Management Subscription 5.18% of the
            outstanding Common Shares of the Corporation on a non-diluted basis.

      2.2.3 THIRD ADDITIONAL SUBSCRIPTION

            On the date that is mutually agreed upon by Draxis Health and SGF
            Sante after good faith discussions to determine when the funds are
            required by the Corporation to complete its Capital Plan, but in any
            event, no later than December 31, 2002 (the "Third Closing") Draxis
            Health and SGF Sante hereby agree to subscribe for and to purchase
            and take up, and the Corporation hereby agrees to allot and issue
            from treasury to Draxis Health and SGF Sante, the Common Shares set
            out below for a subscription price of $1.50 per share:

                                                                 Aggregate
             Subscriber               Number of Shares        Subscription Price
            ------------------      --------------------    --------------------
            Draxis Health                748,319               $1,122,478.50

            SGF Sante                    362,792                $544,188.00

            The Common Shares issued pursuant to this Third Closing shall
            represent, along with the Management Subscription 4.93% of the
            outstanding Common Shares of the Corporation on a non-diluted basis.

      2.2.4 FOURTH ADDITIONAL SUBSCRIPTION

            On the date that is mutually agreed upon by Draxis Health and SGF
            Sante after good faith discussions to determine when the funds are
            required by the Corporation to complete its Capital Plan, but in any
            event, no later than March 31, 2003 (the "Fourth Closing") Draxis
            Health and SGF Sante hereby agree to subscribe for and to purchase
            and take up, and the Corporation hereby agrees to allot and issue
            from treasury to Draxis Health and SGF Sante, the Common Shares set
            out below for a subscription price of $1.50 per share:

                                                                 Aggregate
             Subscriber               Number of Shares        Subscription Price
            ------------------      --------------------    --------------------
            Draxis Health                748,319               $1,122,478.50

            SGF Sante                    362,792                $544,188.00

            The Common Shares issued pursuant to this Fourth Closing shall
            represent, along with the Management Subscription 4.70% of the
            outstanding Common Shares of the Corporation on a non-diluted basis.

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                                      -4-

            (The Second Additional Subscription, the Third Additional
            Subscription and the Fourth Additional Subscription are collectively
            referred to as the "Additional Subscriptions")."

4.    Section 2.3 of the Subscription Agreement is deleted and replaced with
      the following:

      "In the event that there is, before the Third Closing or the Fourth
      Closing, a refinancing by the Corporation of its senior debt which ranks
      prior to the Shareholders' Subordinated Debt on terms and conditions
      satisfactory to Draxis Health and SGF Sante, the parties hereby agree to
      negotiate in good faith with respect to a reduction in the amount of the
      Additional Subscriptions. The total of the new financing and Additional
      Subscriptions, as reduced, must be sufficient to enable the Corporation to
      implement the Capital Plan. Failing agreement between Draxis Health and
      SGF Sante on any such reduction, the obligation to make the full
      Additional Subscriptions shall remain in full force and effect."

5.    Section 2.4 of the Subscription Agreement is deleted and replaced with
      the following:

      "The Subscription Price of the Subscribed Shares shall be payable by wire
      transfer, cheque or banker's draft to the order of the Corporation at the
      Closing Date, or, as the case may be, the Second Closing, the Third
      Closing or the Fourth Closing with respect to the Additional
      Subscriptions, against delivery by the Corporation of:

      2.4.1       certificates representing the SGF Subscribed Shares, duly
                  registered in the name of SGF Sante, and

      2.4.2       certificates representing the DHI Subscribed Shares, duly
                  registered in the name of Draxis Health.

      The Subscribed Shares shall be duly allotted and issued as fully paid and
      non-assessable."

6.    Save as aforesaid, all of the terms and conditions of the Subscription
      Agreement remain unchanged.

7.    The Corporation hereby declares that it has taken communication of the
      foregoing amendment and agrees to be bound hereby.

        (The remainder of the page has intentionally been left blank)

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                                      - 5 -

IN WITNESS HEREOF THE PARTIES HAVE SIGNED THIS AGREEMENT AS OF THE DATE
HEREINABOVE FIRST MENTIONED.

                                     SGF SANTE INC.

                                     /s/ Dupuis Angers
                                     -------------------------------------------
                               Per: Dupuis Angers

                                     /s/ Michel Sainte-Marie
                                     -------------------------------------------
                                Per: Michel Sainte-Marie

                                     DRAXIS HEALTH INC.

                                     /s/ Jim A.H. Garner
                                     -------------------------------------------
                                Per: Jim A.H. Garner

                                     DRAXIS PHARMA INC.

                                     /s/ Jim A.H. Garner
                                     -------------------------------------------
                                Per: Jim A.H. GarnerQuickLinks
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Exhibit 10.1  

 
 

AMENDMENT NO.2
  TO THE
  BOSTON PROPERTIES, INC.
  1997 STOCK OPTION AND INCENTIVE PLAN
  AS AMENDED AND RESTATED ON JANUARY 24, 2000    
    

A.    The
Boston Properties, Inc. 1997 Stock Option and Incentive Plan (the "Plan"), as amended and restated on January 24, 2000, is hereby amended, by action of the Board of
Directors of the Company at a meeting of the Board duly called and held on March 4, 2003, as follows: 

        1.     Section
5(c)(i)(B) is hereby amended by adding the following sentence at the end thereof: 

"No
Option shall be granted pursuant to the provisions of this Section 5(c)(i)(B) after December 31, 2002." 

        2.     Section
5(c)(i)(C) is hereby amended by adding the following sentence at the end thereof: 

"No
Option shall be granted pursuant to the provisions of this Section 5(c)(i)(C) after December 31, 2002." 

B.    Except
as amended as provided therein, this Plan shall be confirmed in all other respects. 

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AMENDMENT NO.2 TO THE BOSTON PROPERTIES, INC. 1997 STOCK OPTION AND INCENTIVE PLAN AS AMENDED AND RESTATED ON JANUARY 24, 2000

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