SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, DC 20549

                                  SCHEDULE 13G/A

 INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT TO RULES 13d-1(b), (c)
         AND (d) AND AMENDMENTS THERETO FILED PURSUANT TO RULE 13d-2(b)

                               (AMENDMENT NO. 1)*

                                PERRIGO COMPANY
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                              (Name of Issuer)

                        Common Stock, without par value
--------------------------------------------------------------------------------
                       (Title of Class of Securities)

                                   714290103
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                                 (CUSIP Number)

                               December 31, 2001
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            (Date of Event Which Requires Filing of this Statement)

         Check the appropriate box to designate the rule pursuant to which this
Schedule is filed:

                  [ ]    Rule 13d-1(b)

                  [X]    Rule 13d-1(c)

                  [ ]    Rule 13d-1(d)

         *The remainder of this cover page shall be filled out for a reporting
person's initial filing on this form with respect to the subject class of
securities, and for any subsequent amendment containing information which would
alter the disclosures provided in a prior cover page.

         The information required in the remainder of this cover page shall not
be deemed to be "filed" for the purpose of Section 18 of the Securities Exchange
Act of 1934 ("Act") or otherwise subject to the liabilities of that section of
the Act, but shall be subject to all other provisions of the Act (however, see
the Notes).


                               Page 1 of 7 Pages
                                No Exhibit Index



CUSIP NO. 714290103                  13G/A                   PAGE 2 OF 7 PAGES
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  1     Names of Reporting Persons/I.R.S. Identification Nos. of Above Persons
        (Entities Only)

        Michael J. Jandernoa
--------------------------------------------------------------------------------
  2     Check the Appropriate Box if a Member of a Group     (a) [ ]
        (See Instructions)                                   (b) [ ]


--------------------------------------------------------------------------------
  3     SEC Use Only


--------------------------------------------------------------------------------
  4     Citizenship or Place of Organization

        United States
--------------------------------------------------------------------------------
    Number of
                           5       Sole Voting Power

     Shares                        8,659,612
                           -----------------------------------------------------
   Beneficially            6       Shared Voting Power

                                   0
     Owned by              -----------------------------------------------------
                           7       Sole Dispositive Power

       Each                        8,658,513
                           -----------------------------------------------------
     Reporting             8       Shared Dispositive Power


    Person With                    0
--------------------------------------------------------------------------------
  9     Aggregate Amount Beneficially Owned by Each Reporting Person

        9,135,802
--------------------------------------------------------------------------------
 10     Check if the Aggregate Amount in Row (9) Excludes Certain Shares [ ]
        (See Instructions)


--------------------------------------------------------------------------------
 11     Percent of Class Represented by Amount in Row (9)

        12.4%
--------------------------------------------------------------------------------
 12     Type of Reporting Person (See Instructions)

        IN
--------------------------------------------------------------------------------



CUSIP NO. 714290103                   13G/A                   PAGE 3 OF 7 PAGES
--------------------------------------------------------------------------------
  1     Names of Reporting Persons/I.R.S. Identification Nos. of Above Persons
        (Entities Only)

        Michael J. Jandernoa Trust
--------------------------------------------------------------------------------
  2     Check the Appropriate Box if a Member of a Group     (a) [ ]
        (See Instructions)                                   (b) [ ]


--------------------------------------------------------------------------------
  3     SEC Use Only


--------------------------------------------------------------------------------
  4     Citizenship or Place of Organization

        Michigan
--------------------------------------------------------------------------------
    Number of
                           5       Sole Voting Power

     Shares                        5,921,457
                           -----------------------------------------------------
   Beneficially            6       Shared Voting Power

                                   0
     Owned by              -----------------------------------------------------
                           7       Sole Dispositive Power

       Each                        5,921,457
                           -----------------------------------------------------
     Reporting             8       Shared Dispositive Power


    Person With                    0
--------------------------------------------------------------------------------
  9     Aggregate Amount Beneficially Owned by Each Reporting Person

        5,921,457
--------------------------------------------------------------------------------
 10     Check if the Aggregate Amount in Row (9) Excludes Certain Shares [ ]
        (See Instructions)


--------------------------------------------------------------------------------
 11     Percent of Class Represented by Amount in Row (9)

        8.1%
--------------------------------------------------------------------------------
 12     Type of Reporting Person (See Instructions)

        OO-Trust
--------------------------------------------------------------------------------



CUSIP NO. 714290103               13G/A                        PAGE 4 OF 7 PAGES
          ---------




ITEM 1.

(a)  Name of Issuer:                                     Perrigo Company
(b)  Address of Issuer's Principal Executive Offices:    515 Eastern Avenue
                                                         Allegan, Michigan 49010

ITEM 2.

(a) - (c) Name, Principal Business Address and Citizenship of Person Filing:

           Michael J. Jandernoa
           c/o Law Weathers & Richardson
           333 Bridge Street, NW, Suite 800
           Grand Rapids, Michigan 49504
           Citizenship:  United States

(d)    Title of Class of Securities:  Common Stock, without par value.
(e)    CUSIP Number:  714290103


ITEM 3.       IF THIS STATEMENT IS FILED PURSUANT TO RULE 13d-1(b), OR
              13d-2(b) OR (c), CHECK WHETHER THE PERSON FILING IS A:

(a) - (j)  Not Applicable.


ITEM 4.       OWNERSHIP

(a)  Mr. Jandernoa is the beneficial owner of 9,135,802 shares of the Issuer's
     common stock, without par value. The Michael J. Jandernoa Trust, of which
     Mr. Jandernoa is the sole trustee, holds 5,921,457 shares of the Issuer's
     common stock. The Michael J. Jandernoa Grantor Trust 2, of which Mr.
     Jandernoa is the sole trustee and has a reversionary interest, holds
     296,843 shares of the Issuer's common stock. Mr. Jandernoa holds sole
     voting and dispositive power in both the Michael J. Jandernoa Trust and the
     Michael J. Jandernoa Grantor Trust 2. The Susan M. Jandernoa Trust holds
     179,347 shares of the Issuer's common stock. Mrs. Jandernoa is the sole
     trustee and holds sole voting and dispositive power for the shares of
     common stock held by the Susan M. Jandernoa Trust. The Susan M. Jandernoa
     Grantor Trust 2 holds 296,843 shares of the Issuer's common stock. Mrs.
     Jandernoa is the sole trustee and holds sole voting and dispositive power
     for the shares of common stock held by the Susan M. Jandernoa Grantor Trust
     2. The MSJ Investment Limited Partnership owns 2,234,600 shares of the
     Issuer's common stock. The Michael J. Jandernoa Trust is the general
     partner and a limited partner of the MSJ Investment Limited Partnership.
     Each of three trusts established for the benefit of Mr. Jandernoa's three
     children are also limited partners in the MSJ Investment Limited
     Partnership. Mr. Jandernoa holds 1,099 shares of the Issuer's common stock
     in the Issuer's Profit Sharing Plan. Mr. Jandernoa holds sole voting power

CUSIP NO. 714290103                  13G/A                    PAGE 5 OF 7 PAGES
          ---------


     and no dispositive power over the 1,099 shares of common stock held in the
     Issuer's Profit Sharing Plan. Mr. Jandernoa holds stock options that give
     him the right to acquire 205,613 shares of the Issuer's common stock within
     60 days of the date of this filing. The figures above are as of January 31,
     2002.

(b)  As of January 31, 2002, Mr. Jandernoa was the beneficial owner of 12.4% of
     the Issuer's outstanding common stock, without par value. The Issuer's most
     recent Form 10-Q (for the quarterly period ended December 31, 2001) lists
     73,375,457 shares of the Issuer's common stock, outstanding as of
     January 11, 2002. In addition, Mr. Jandernoa holds stock options, which
     give him the right to acquire 205,613 shares of the Issuer's common stock.
     Mr. Jandernoa's beneficial ownership percentage is based on a total of
     73,581,070 shares of the Issuer's common stock, which consists of the
     Issuer's outstanding common stock plus shares that would become outstanding
     if Mr. Jandernoa exercised his stock options.

     As of January 31, 2002, the Michael J. Jandernoa Trust held 8.1% of the
     Issuer's outstanding common stock, without par value. The beneficial
     ownership percentage of the Michael J. Jandernoa Trust is based on the
     Issuer's 73,375,457 shares of common stock outstanding as of January 11,
     2002.

(c)  (i)   Mr. Jandernoa has sole power to vote or direct the vote of 8,659,612
           shares of common stock.
     (ii)  Mr. Jandernoa does not share power to vote or to direct the vote of
           any shares of common stock.
     (iii) Mr. Jandernoa has sole power to dispose or direct the disposition of
           8,658,513 shares of common stock.
     (iv)  Mr. Jandernoa does not share power to dispose or to direct the
           disposition of any shares of common stock.


ITEM 5.  OWNERSHIP OF FIVE PERCENT OR LESS OF A CLASS

         Not Applicable.


ITEM 6.  OWNERSHIP OF MORE THAN FIVE PERCENT ON BEHALF OF ANOTHER PERSON

         The Michael J. Jandernoa Trust, of which Mr. Jandernoa is the trustee,
holds 5,921,457 shares of the Issuer's common stock.






CUSIP NO. 714290103                   13G/A                    PAGE 6 OF 7 PAGES
          ---------

ITEM 7.  IDENTIFICATION AND CLASSIFICATION OF THE SUBSIDIARY WHICH ACQUIRED THE
SECURITY BEING REPORTED ON BY THE PARENT HOLDING COMPANY

         Not Applicable.


ITEM 8.  IDENTIFICATION AND CLASSIFICATION OF MEMBERS OF THE GROUP

         Not Applicable.


ITEM 9.  NOTICE OF DISSOLUTION OF GROUP

         Not Applicable.


ITEM 10. CERTIFICATION

         By signing below I certify that, to the best of my knowledge and
belief, the securities referred to above were not acquired and are not held for
the purpose of or with the effect of changing or influencing the control of the
issuer of the securities and were not acquired and are not held in connection
with or as a participant in any transaction having that purpose or effect.




CUSIP NO. 714290103                   13G/A                    PAGE 7 OF 7 PAGES
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                                    SIGNATURE

         After reasonable inquiry and to the best of my knowledge and belief, I
certify that the information set forth in this statement is true, complete and
correct.

                                                February 13, 2002
                                       -----------------------------------------
                                       Date

                                                /s/ Michael J. Jandernoa
                                       -----------------------------------------
                                       Signature

                                                Michael J. Jandernoa
                                       -----------------------------------------
                                       As trustee of the Michael J. Jandernoa
                                       Trust and in his individual capacity