EXHIBIT 4.8 AMENDMENT NO. 1 TO QT 5, INC. $150,000 PROMISSORY NOTE This Amendment No. 1 to the QT 5, INC. $150,000 Promissory Note (the "Amendment"), is entered into effective February 28, 2003, by and between QT 5, Inc., a Delaware corporation ("QT...

                                                                     EXHIBIT 4.8
                               AMENDMENT NO. 1 TO

                       QT 5, INC. $150,000 PROMISSORY NOTE

         This Amendment No. 1 to the QT 5, INC.  $150,000  Promissory  Note (the
"Amendment"),  is entered into effective February 28, 2003, by and between QT 5,
Inc.,  a Delaware  corporation  ("QT 5") and NDMS  Investments,  L.P.,  a Nevada
limited partnership ("NDMS").

         WHEREAS,  QT 5 issued a $150,000  Promissory  Note to NDMS on September
30, 2002 in the principal amount of $150,000 (the "Note");

         WHEREAS,  the maturity date of the Note is March 1, 2002 (the "Maturity
Date") and the parties have agreed to amend the Maturity  Date to April 30, 2003
under the terms contained herein;

         NOW, THEREFORE,  for valuable consideration the sufficiency of which is
hereby acknowledged, the parties agree as follows:

         1. Amendment of Due Date. Section 1.1 is hereby amended in its entirety
as follows:

                  "The  outstanding  principal shall be due and payable,  unless
                  earlier  converted by Holder,  at the earlier of (i) April 30,
                  2003 or (ii) a  financing  in which the Company  receives  net
                  proceeds  of  $1  million  (the  "Maturity  Date").   Payments
                  hereunder  shall be made by the Company to the Holder,  at the
                  address as  provided  to the Company by the Holder in writing,
                  in lawful money of the United  States of America no later than
                  1 business day  following the Maturity  date.  This Note shall
                  bear no interest."

         2. Amendment of Principal  Amount.  The principal  amount due under the
Note is hereby amended to $152,500.

         3.  Conversion  Price.  Section 2.2 shall be amended in its entirety to
read as follows:

                  "The  number  of  shares  of  Stock  to be  issued  upon  such
                  conversion shall equal the aggregate amount of principal under
                  the Note then  outstanding  divided by the  Conversion  Price,
                  which  shall  initially  be set at $1.00 per share;  provided,
                  however,  that the Conversion  Price shall be adjusted to $.10
                  if this note is not paid in full by the Maturity Date."

         All other  terms of the  Promissory  Note and other  related  documents
shall remain in full force and effect.

QT 5, INC.                                NDMS Investments, L.P.


By: /s/ XXXXXXX X. XXXXX                   /s/ XXXXXX X. XXXXX
   ------------------------               ----------------------------
    Xxxxxxx X. Xxxxx, CEO                  Xxxxxx X. Xxxxx, Partner