EXHIBIT 10.28






                               September  1,  1999


Tom  Jenuleson
Chief  Financial  Officer  and
     Vice  President
Allied  Healthcare  Products,  Inc.
1720  Sublette  Avenue
St.  Louis,  MO  63110

     Re:  LETTER OF SECOND  AMENDMENT  ("SECOND  AMENDMENT")  TO THE  $5,000,000
          PROMISSORY   NOTE  DATED  AUGUST  7,  1998  ("NOTE")  MADE  BY  ALLIED
          HEALTHCARE  PRODUCTS,  INC.  ("COMPANY")  TO THE ORDER OF LASALLE BANK
          NATIONAL ASSOCIATION ("BANK")

Dear  Mr.  Jenuleson:

     Reference  is  made  to the above Note.  All capitalized terms used and not
otherwise  defined  herein  shall  have  the  meanings  given  them in the Note.

     Pursuant  to  provisions of the Note, the Company is limited in its ability
to  sell,  lease,  assign,  transfer  or  otherwise dispose of its properties or
assets.  The Note additionally requires that the Company maintain a Tangible Net
Worth  at  all  times  of  not  less  than  $21,000,000.   In that certain First
Amendment  letter  dated  March 24, 1999 by and between the Company and the Bank
(the "First Amendment"), the parties agreed to waive said requirement from March
24, 1999 through and including June 30, 1999 provided the Company's Tangible Net
Worth  during  such  period  not  be less than $20,000,000.  The First Amendment
further  provided  that  after  June 30, 1999 the requirement that the Company's
Tangible  Net  Worth  would  not  be  less  than  $21,000,000  was reinstituted.

     Subject to the terms herein provided, this will serve as the Bank's consent
and  agreement  to  the  following:

     3.   The  terms of Page 7,  paragraph  (n) of the Note  requiring  that the
          Company's Tangible Net Worth at all times not be less than $21,000,000
          are hereby waived from this date  provided the Company's  Tangible Net
          worth at the close of each fiscal quarter beginning June 30, 1999 must
          not be less than the sum of (i)  $17,500,000  plus (ii) fifty  percent
          (50%) of the Net Income  (exclusive  of any losses)  reflected in each
          audited income statement for each fiscal year beginning June 30, 1999.
          For the purposes of this  paragraph,  the "Net Income" shall mean, for
          any Period of  calculation,  the Company's net income as determined in
          accordance with GAAP but excluding any extraordinary gains and losses,
          net of taxes.



     Except  as  expressly stated herein, the Loan Documents, as hereby amended,
shall  remain  in full force and effect and are hereby ratified and confirmed in
all  respects.  The  execution,  delivery  and  effectiveness  of  this  letter
agreement  shall  not  operate  as a waiver of any right, power or remedy of the
Bank under any of the Loan Documents nor constitute a waiver of any provision of
the  Loan  Documents  as  except  as specifically set forth herein.  The Company
hereby  ratifies, reaffirms, acknowledges and agrees that the Loan Documents, as
hereby  amended,  are  and  shall  continue  to  be  the  valid  and enforceable
obligations  of  the  Company.

     If  the  foregoing meets with your approval and acceptance, please indicate
your  agreement  where  indicated  below.

                                  LASALLE  NATIONAL  BANK



                                  By:
                                     ----------------------------------
                                       Robert  S.  Holmes,
                                       Senior  Vice  President


     The  undersigned Allied Healthcare Products, Inc. hereby agrees and accepts
the  terms  of  the  above  letter  as  of  the  date  first  above  written.

                                  ALLIED  HEALTHCARE  PRODUCTS,  INC.



                                  By:
                                     ----------------------------------
                                      Tom  Jenuleson,
                                      Chief Financial Officer and Vice President