<PAGE>
                                       1


                                 PROMISSORY NOTE


Date:  October 16, 1998                           Maturity Date:  June 1, 1999

Amount:  $200,000.00

================================================================================
Lender:                                        Borrower:

Joan L. Fitterling, as Trustee, or her         Medical Technology Systems, Inc.
successor in Trust of the Joan L.              12920 Automobile Boulevard
Fitterling Revocable Trust dated               Clearwater, Florida  33762
August 15, 1995
358 Bahia Vista Drive
Indian Rocks Beach, FL  33785

================================================================================

FOR VALUE RECEIVED,  the undersigned  Borrower  unconditionally (and jointly and
severally,  if more than one)  promises to pay to the order of the  Lender,  its
successors  and  assigns,  without  setoff,  at  its  offices  indicated  at the
beginning  of this Note,  or at such  other  place as may be  designated  by the
Lender,  the  principal  amount  of Two  Hundred  Thousand  and  No/100  Dollars
($200,000.00),  or so  much  thereof  as may be  advanced  from  time to time in
immediately  available  funds,  together  with  interest  computed  daily on the
outstanding  principal  balance  hereunder,  at an annual  interest rate, and in
accordance with the payment schedule, indicated below.

1. Rate

     Fixed Rate. The Rate shall be fixed at twelve percent (12.0%) per annum.

     Notwithstanding  any provision of this Note,  the Lender does not intend to
     charge and the Borrower shall not be required to pay any amount of interest
     or other charges in excess of the maximum  permitted by the  applicable law
     of the State of Florida;  if any higher rate  ceiling is lawful,  then that
     higher rate  ceiling  shall  apply.  Any payment in excess of such  maximum
     shall be refunded to the  Borrower or credited  against  principal,  at the
     option of the Lender.

2. Accrual Method.  Unless otherwise  indicated,  interest at the Rate set forth
above will be  calculated  by the 365/360 day method (a daily amount of interest
is computed for a  hypothetical  year of 360 days;  that amount is multiplied by
the actual number of days for which any principal is outstanding hereunder).


<PAGE>
                                       2


3. Payment  Schedule.  Interest only payments shall be made commencing one month
from the date hereof and  continuing  on the same day of each  succeeding  month
until June 1, 1999, at which time the principal and all accrued  interest  shall
be due and  payable.  The  maturity  date of this  Note  shall be  automatically
extended from June 1, 1999 to September 1, 1999 if the Borrower satisfies all of
the terms and conditions of a Loan  Agreement of even date herewith  between the
Borrower and the Lender.  All payments received hereunder shall be applied first
to the payment of any expense or charges  payable  hereunder  or under any other
documents  executed  in  connection  with this Note,  then to  interest  due and
payable, with the balance being applied to principal,  or in such other order as
the Lender shall  determine at its option.  Any payments made by check which are
returned  for  insufficient  funds shall be subject to a $30.00  returned  check
charge,  or such  higher  amount as provided by law.  Any  returned  check shall
constitute a default  hereunder,  notwithstanding  any  previous  waiver of such
default.  The  Lender  reserves  the right to require  cashier's  checks for any
future payments the return of any check for insufficient funds.

4. Waivers,  Consents and  Covenants.  The  Borrower,  any endorser or guarantor
hereof,  or any other party hereto  (individually  an "Obligor" and collectively
"Obligors")  and each of them  jointly  and  severally:  (a) waive  presentment,
demand,  protest,  notice of demand,  notice of intent to accelerate,  notice of
acceleration  of maturity,  notice of protest,  notice of nonpayment,  notice of
dishonor, and any other notice required to be given under the law to any Obligor
in connection with the delivery, acceptance, performance, default or enforcement
of this Note, any  endorsement or guaranty of this Note, or any other  documents
executed in connection  with this Note or any other note or other loan documents
now or hereafter  executed in connection  with any obligation of the Borrower to
the Lender  (the "Loan  Documents");  (b)  consent  to all  delays,  extensions,
renewals or other  modifications of this Note or the Loan Documents,  or waivers
of any term  hereof or of the Loan  Documents,  or release or  discharge  by the
Lender of any of Obligors, or release,  substitution or exchange of any security
for the payment hereof,  or the failure to act on the part of the Lender, or any
indulgence  shown by the Lender (without notice to or further assent from any of
Obligors),  and agree that no such action, failure to act or failure to exercise
any  right or  remedy  by the  Lender  shall in any way  affect  or  impair  the
obligations  of any  Obligors or be  construed  as a waiver by the Lender of, or
otherwise  affect,  any of the  Lender's  rights  under  this  Note,  under  any
endorsement or guaranty of this Note or under any of the Loan Documents; and (c)
agree to pay, on demand, all costs and expenses of collection or defense of this
Note or of any  endorsement or guaranty hereof and/or the enforcement or defense
of the  Lender's  rights with  respect to, or the  administration,  supervision,
preservation,  or protection  of, or  realization  upon,  any property  securing
payment  hereof,  including,  without  limitation,   reasonable  attorney's  and
paralegal's fees,  including fees related to any suit,  mediation or arbitration
proceeding,   out  of  court  payment  agreement,   trial,  appeal,   bankruptcy
proceedings or other proceeding,  in such amount as may be determined reasonable
by any arbitrator or court, whichever is applicable.

5.  Indemnification.  Obligors  agree to promptly  pay,  indemnify  and hold the
Lender  harmless  from all  state  and  federal  taxes  of any  kind  and  other
liabilities  with respect to or resulting from the execution  and/or delivery of
this Note or any  advances  pursuant to this Note.  If this Note has a revolving
feature  and  is  secured  by a  mortgage,  Obligors  expressly  consent  to the
deduction  of any  applicable  taxes from each taxable  advance  extended by the
Lender.

6. Prepayments.  Prepayments may be made in whole or in part at any time without
premium or penalty. All prepayments of principal shall be applied in the inverse
order of maturity,  or in such other order as the Lender shall  determine in its
sole discretion.


<PAGE>
                                       3


7. Events of Default.  The  following are events of default  hereunder:  (a) the
failure to pay any  obligation,  liability or indebtedness of any Obligor to the
Lender, whether under this Note or any Loan Documents,  as and when due (whether
at  maturity  or  by  acceleration);  (b)  the  failure  to  perform  any  other
obligation,  liability  or  indebtedness  of any  Obligor to the  Lender,  which
failure is not cured within  fifteen (15) days from the date on which the Lender
provides the Borrower  written notice of such failure to the extent that default
any such  default  can be  cured  by the  Borrower;  (c) the  commencement  of a
proceeding against any Obligor for dissolution or liquidation,  the voluntary or
involuntary  termination  or  dissolution  of  any  Obligor  or  the  merger  or
consolidation of any Obligor with or into another entity; (d) the insolvency of,
the business failure of, the appointment of a custodian,  trustee, liquidator or
receiver for or for any of the property  of, the  assignment  for the benefit of
creditors  by, or the  filing of a  petition  under  bankruptcy,  insolvency  or
debtor's  relief  law  or  the  filing  of a  petition  for  any  adjustment  of
indebtedness,  composition  or  extension  by or against  any  Obligor;  (e) the
determination  by the Lender that any  representation  or  warranty  made to the
Lender by any Obligor in any Loan  Documents or  otherwise  or in any  financial
statement or financial information submitted to the Lender by the Borrower is or
was,  when it was made,  untrue  or  materially  misleading;  (f) the entry of a
judgment  against any  Obligor in excess of  $50,000.00,  which  judgment is not
satisfied  or bonded off within  thirty  (30) days from the date of entry of the
judgment;  (g) the  seizure or  forfeiture  of, or the  issuance  of any writ of
possession, garnishment or attachment which writ relates to any damage in excess
of $50,000.00  and which writ is not dismissed  within thirty (30) days from the
date of issuance of any such writ; or (h) the failure of the Borrower's business
to comply in any material  respect with any law or  regulation  controlling  its
operation.

8. Remedies upon  Default.  Whenever  there is a default under this Note (a) the
entire balance outstanding hereunder and all other obligations of any Obligor to
the Lender (however  acquired or evidenced)  shall, at the option of the Lender,
become  immediately  due and payable and any  obligation of the Lender to permit
further borrowing under this Note shall immediately cease and terminate;  (b) to
the extent  permitted by law, the Rate of interest on the unpaid principal shall
be increased at the Lender's  discretion  up to the maximum rate allowed by law,
or if none,  18% per annum (the  "Default  Rate");  (c) the  warrant to purchase
800,000 shares of the common stock, par value $.01 per share, of the Borrower at
a price of $.05 per share (the  "Warrant"),  attached  to the Note as Exhibit A,
will become  exercisable  for up to ten years or until such time as the Borrower
cures the  default  by paying  to the  Lender  the  entire  balance  outstanding
hereunder in which case the Warrant will  terminate  (if the Borrower  cures the
default within six months after the Lender  exercises the Warrant,  the Borrower
will be entitled to repurchase  the common stock  purchased by the Lender at the
Lender's  purchase  price as  defined  in the  Warrant);  and (d) to the  extent
permitted by law, a delinquency charge may be imposed in the amount of 5% of the
outstanding balance for each day any payment is in default for more than 5 days.
The provisions  herein for a Default Rate shall not be deemed to extend the time
for any payment  hereunder or to constitute a "grace period" giving the Obligors
a right to cure any  default.  At the  Lender's  option,  any accrued and unpaid
interest,  fees or charges may, for purposes of computing and accruing  interest
on a daily basis after the due date of the Note or any installment  thereof,  be
deemed to be a part of the  principal  balance,  and interest  shall accrue on a
daily compounded basis after such date at the Default Rate provided in this Note
until the entire outstanding  balance of principal and interest is paid in full.
Upon a default under this Note, the Lender is hereby  authorized at any time, at
its  option and  without  notice or demand,  to set off and charge  against  any
deposit  accounts of any Obligor  (as will any money,  instruments,  securities,
documents,  chattel  paper,  credits,  claims,  demands,  income  andy any other
property,  rights and  interests of any  Obligor),  which at any time shall come
into the  possession or custody or under the control of the Lender or any of its
agents,  affiliates or  correspondents,  any and all  obligations due hereunder.
Additionally, the Lender shall have all rights and remedies available under each
of the Loan Documents, as well as all rights and remedies available at law or in
equity.  Any judgment  rendered on this Note shall bear  interest at the highest
rate of interest permitted pursuant to Chapter 687, Florida Statutes.


<PAGE>
                                       4


9.  Non-waiver.  The  failure at any time of the Lender to  exercise  any of its
options or any other rights hereunder shall not constitute a waiver thereof, nor
shall it be a bar to the  exercise  of any of its  options  or rights at a later
date.  All rights and  remedies  of the Lender  shall be  cumulative  and may be
pursued  singly,  successively  or  together,  at the option of the Lender.  The
acceptance by the Lender of any partial payment shall not constitute a waiver of
any default or of any of the Lender's  rights under this Note.  No waiver of any
of its rights hereunder, and no modification or amendment of this Note, shall be
deemed to be made by the Lender unless the same shall be in writing, duly signed
on behalf of the Lender;  each such waiver  shall apply only with respect to the
specific instance involved,  and shall in no way impair the rights of the Lender
or the  obligations  of Obligors to the Lender in any other respect at any other
time.

10.  Applicable  Law,  Venue  and  Jurisdiction.  This Note and the  rights  and
obligations of the Borrower and the Lender shall be governed by and  interpreted
in  accordance  with  the law of the  State of  Florida.  In any  litigation  in
connection  with or to enforce this Note or any  endorsement or guaranty of this
Note or any Loan Documents,  Obligors,  and each of them, irrevocably consent to
and confer  personal  jurisdiction  on the courts of the State of Florida or the
United  States  located  within the State of  Florida  and  expressly  waive any
objections  as to venue in any such  courts.  Nothing  contained  herein  shall,
however,  prevent the Lender from bringing any action or  exercising  any rights
within any other state or jurisdiction or from obtaining  personal  jurisdiction
by any other means available under  applicable law. The interest rate charged on
this Note is authorized  by Chapter 655,  Florida  Statutes and Section  687.12,
Florida Statutes.

11. Partial Invalidity.  The  unenforceability or invalidity of any provision of
this Note shall not affect the  enforceability  validity of any other  provision
herein and the invalidity or  unenforceability  of any provision of this Note or
of the Loan  Documents  to any  person  or  circumstance  shall not  affect  the
enforceability or validity of such provision as it may apply to other persons or
circumstances.

12. Binding Effect.  This Note shall be binding upon and inure to the benefit of
the Borrower, Obligors and the Lender and their respective successors,  assigns,
heirs and personal  representatives,  provided,  however, that no obligations of
the Borrower or Obligors hereunder can be assigned without prior written consent
of the Lender.

13. Controlling  Document.  To the extent that this Note conflicts with or is in
any way incompatible  with any other document  related  specifically to the loan
evidenced by this Note, this Note shall control over any other such document and
if this Note does not  address an issue,  then each other  such  document  shall
control to the extent that it deals most specifically with an issue.


<PAGE>
                                       5


14.  WAIVER  OF  JURY  TRIAL.   AFTER   CONSULTING   WITH  COUNSEL  AND  CAREFUL
CONSIDERATION, THE BORROWER AND THE LENDER (BY ITS ACCEPTANCE HEREOF) KNOWINGLY,
VOLUNTARILY,  AND INTENTIONALLY  WAIVE THE RIGHT ANY OF THEM MAY HAVE TO A TRIAL
BY JURY WITH  RESPECT  TO ANY  LITIGATION  ARISING  OUT OF THIS NOTE OR THE LOAN
DOCUMENTS, OR OUT OF ANY COURSE OF CONDUCT, COURSE OF DEALING,  STATEMENTS (ORAL
OR WRITTEN), OR ACTIONS OF THE BORROWER OR THE LENDER. THIS WAIVER IS A MATERIAL
INDUCEMENT TO THE LENDER'S  ACCEPTANCE OF THIS NOTE. The Borrower  represents to
the Lender that the proceeds of this loan are to be used primarily for business.
The Borrower acknowledges having read and understood, and agrees to be bound by,
all terms and  conditions of this Note and hereby  executes this Note under seal
as of the date here above written.

NOTICE OF FINAL  AGREEMENT.  THIS WRITTEN  PROMISSORY  NOTE REPRESENTS THE FINAL
AGREEMENT  BETWEEN THE PARTIES AND MAY NOT BE CONTRADICTED BY EVIDENCE OF PRIOR,
CONTEMPORANEOUS, OR SUBSEQUENT ORAL AGREEMENTS OF THE PARTIES.
THERE ARE NO UNWRITTEN ORAL AGREEMENTS BETWEEN THE PARTIES.

If this Note is secured by a mortgage on real property,  documentary stamp taxes
have been paid and affixed to the mortgage.

EXECUTION DATE:  October 16, 1998


                                     BORROWER:

                                     MEDICAL TECHNOLOGY SYSTEMS, INC.

                                     By:_______________________________________
                                        Todd E. Siegel
                                        President