SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549

                                  SCHEDULE 13D
                                (AMENDMENT NO. 4)

                    UNDER THE SECURITIES EXCHANGE ACT OF 1934

                               NovaDel Pharma Inc.
                                (Name of Issuer)

                     Common Stock, par value $.001 per share
                         (Title of Class of Securities)

                                    66986X106
                                 (CUSIP Number)

                           Lindsay A. Rosenwald, M.D.
                               787 Seventh Avenue
                               New York, NY 10019
                                 (212) 554-4300

            (Name, Address and Telephone Number of Person Authorized
                     to Receive Notices and Communications)


                                  May 15, 2006

             (Date of Event which Requires Filing of this Statement)

If the filing person has previously filed a statement on Schedule 13G to report
the acquisition which is the subject of this Statement because of Rule
13d-1(b)(3) or (4), check the following:


Check the following box if a fee is being paid with this Statement:







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CUSIP NO. 66986X106                    13D/A            PAGE 2 OF 5 PAGES
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1    NAMES OF REPORTING PERSONS
     S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON

     Lindsay A. Rosenwald, M.D.
--------------------------------------------------------------------------------
2    CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP
     (a)  |_|
     (b)  |_|
--------------------------------------------------------------------------------
3    SEC USE ONLY


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4    SOURCE OF FUNDS*

     OO (see Item 3 below)
--------------------------------------------------------------------------------
5    CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO
     ITEM 2(d) or 2(e)                                                  |_|

--------------------------------------------------------------------------------
6    CITIZENSHIP OR PLACE OF ORGANIZATION

     United States
--------------------------------------------------------------------------------
               7    SOLE VOTING POWER

                    9,491,924
               -----------------------------------------------------------------
  NUMBER OF    8    SHARED VOTING POWER
   SHARES
BENEFICIALLY        0
  OWNED BY     -----------------------------------------------------------------
    EACH       9    SOLE DISPOSITIVE POWER
  REPORTING
   PERSON           9,491,924
    WITH       -----------------------------------------------------------------
               10   SHARED DISPOSITIVE POWER

                    0
--------------------------------------------------------------------------------
11   AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

     9,491,924
--------------------------------------------------------------------------------
12   CHECK BOX IF THE AGGREGATE AMOUNT IN ROW 11 EXCLUDES CERTAIN SHARES*
                                                                            |_|

--------------------------------------------------------------------------------
13   PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

     16.9
--------------------------------------------------------------------------------
14   TYPE OF REPORTING PERSON*

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


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This Amendment No. 4 amends and supplements the following items of the Statement
on  Schedule  13D filed by Lindsay A.  Rosenwald  (the  "Reporting  Person")  on
December 21, 2001, as amended by Amendment No. 1 filed March 14, 2002, Amendment
No. 2 filed  January  23,  2006 and  Amendment  No. 3 filed  April 24, 2006 (the
"Schedule").

ITEM 3. SOURCE AND AMOUNT OF FUNDS OR OTHER CONSIDERATION.

Item 3 is hereby  amended  and  supplemented  by  replacing  the last  paragraph
thereof with the following:

Paramount BioCapital, Inc. ("Paramount"), an NASD member broker dealer, acted as
co-placement  agent  for the  Issuer  in a  private  placement  of the  Issuer's
securities  consummated on April 19, 2006. In connection  with such  activities,
Paramount  has  designated to the Reporting  Person,  among other  compensation,
warrants to purchase  156,388 shares of common stock,  par value $.001 per share
(the "Common Stock"),  of the Issuer.  The Reporting  Person is chairman,  Chief
Executive Officer and sole stockholder of Paramount.

ITEM 5. INTEREST IN SECURITIES OF ISSUER.

      Item 5(a) is hereby amended as follows:

      (a)   As of the  date  hereof,  the  Reporting  Person  may be  deemed  to
            beneficially  own 9,491,924 Shares comprised of (i) 2,155,660 Shares
            and (ii) 7,336,264 Shares issuable upon exercise of the common stock
            purchase  warrants  owned  directly by the  Reporting  Person.  Such
            Shares constitute  approximately  16.9% of the Issuer's  outstanding
            shares of Common Stock.

      Item 5(c) is hereby amended as follows:

      (c)   Item 3 is incorporated herein by reference.  In addition, on May 15,
            2006, the Reporting  Person  transferred  2,900,000 shares of Common
            Stock  to The  Lindsay  A.  Rosenwald  2000  (Delaware)  Irrevocable
            Indenture of Trust dated May 24, 2000, which is a trust  established
            for the  benefit  of the  Reporting  Person.  The  Reporting  Person
            disclaims  beneficial  ownership  of the shares  held by such Trust,
            except to the extent of his pecuniary interest therein, if any.

ITEM 6. CONTRACTS, ARRANGEMENTS, UNDERSTANDINGS OR RELATIONSHIPS WITH RESPECT TO
        SECURITIES OF THE ISSUER

      Item 6 is hereby amended as follows:

      (a)   Paramount  has acted as  placement  agent for the  Issuer in private
            placements  of the  Issuer's  securities  in April  2003,  May 2003,
            November 2003, December 2003, May 2005 and April 2006. In connection
            with such activities, Paramount's designees (including the Reporting
            Person  himself) have received cash fees and warrants  (described in
            (d)  below)  to  purchase  securities  of the  Issuer.  Although  no
            agreement has been  executed,  it is possible that Paramount will be
            engaged by the Issuer to raise  private  capital in the future.  The
            Reporting  Person is  chairman,  Chief  Executive  Officer  and sole
            stockholder of Paramount.


                                       -3-


      (b)   As a result of its contractual  rights  resulting from the Reporting
            Person's  purchase of securities of the issuer in December 2001, the
            Reporting  Person  exercised  his right to appoint a director of the
            Company  (Jay  Lobell) and have an observer at meetings of the Board
            of Directors.

      (c)   Included in the 7,336,264 warrants to purchase Shares referred to in
            5(a)(ii)  above,  the Reporting  Person owns  6,278,637  warrants to
            purchase  Shares at any time until  December 12, 2008 at an exercise
            price  of  $.46321  per  share.   The   warrants   contain   certain
            anti-dilution   provisions  providing  for  the  adjustment  of  the
            exercise   price  upon  the   occurrence   of   certain   dividends,
            subdivisions,  combinations or reclassifications.  In addition,  the
            exercise price is subject to adjustment  following the occurrence of
            any issuances of Shares or securities convertible into shares with a
            sale or  exercise  price  (as  applicable)  that is  lower  than the
            current market price or exercise price under the warrants.

      (d)   Included in the 7,336,264 warrants to purchase Shares referred to in
            5(a)(ii)  above,  the Reporting  Person owns  1,057,627  warrants to
            purchase   Shares   received  by   reporting   person  as  placement
            commissions a result of the Reporting Person's ownership interest in
            Paramount (the "Placement Warrants"). The Placement Warrants include
            (1) a unit purchase  option to purchase (i) 568,135  Shares at $1.16
            per share  (subject to adjustment) on or before January 30, 2009 and
            (ii) warrants to purchase 170,440 Shares at $1.37 per share (subject
            to  adjustment)  on or before  January  30,  2009;  (2)  warrants to
            purchase  162,664  Shares at $1.30 per share (subject to adjustment)
            on or before November 26, 2010; and (3) warrants to purchase 156,388
            Shares at $1.60  per  share  (subject  to  adjustment)  on or before
            October 19,  2011.  The  Placement  Warrants  contain  anti-dilution
            provisions  providing for the  adjustment of the per share  exercise
            price  upon  the   occurrence  of  stock   dividends,   subdivsions,
            combinations  and  reclassifications  and  certain of the  Placement
            Warrants  will  adjust  upon the  issuance  of Shares or  securities
            convertible   into  Shares  with  a  sale  or  exercise   price  (as
            applicable)  that is lower than the current market price or exercise
            price under the warrants.

      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.


Dated:   May 16, 2006
         New York, NY                       By /s/ Lindsay A. Rosenwald, M.D.
                                               ------------------------------
                                                   Lindsay A. Rosenwald, M.D.



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