EXHIBIT 5.1


                                     OPINION

                                    PDI, Inc.
                          Saddle River Executive Centre
                                1 Route 17 South
                         Saddle River, New Jersey 07458


                                                    March 14, 2005


Saddle River Executive Centre
1 Route 17 South
Saddle River, New Jersey 07458

Ladies and Gentlemen:

         I am the general  counsel for PDI,  Inc., a Delaware  corporation  (the
"Corporation"),   and  am  delivering   this  opinion  in  connection  with  the
preparation of the  Registration  Statement on Form S-8 of the Corporation  (the
"Registration   Statement")  to  be  filed  with  the  Securities  and  Exchange
Commission (the  "Commission"),  relating to the registration by the Corporation
of an aggregate of 1,329,132 shares of the Corporation's common stock, par value
$.01 per share, (the "Common Stock"), to be issued pursuant to the Corporation's
2004 Stock Award and Incentive Plan (the "Stock Plan").

         This opinion is being delivered in accordance with the  requirements of
Item  601(b)(5) of Regulation  S-K under the  Securities Act of 1933, as amended
(the "Securities Act").  Capitalized terms used herein but not otherwise defined
herein have the meaning ascribed to them in the Registration Statement.

         In  connection  with this  opinion,  I have  examined the  originals or
copies certified or otherwise authenticated to my satisfaction of such corporate
records of the Corporation,  of certificates of public officials and of officers
of the Corporation, and of other agreements,  instruments or documents as I have
deemed  necessary  as a basis for the  opinions  contained  herein.  I have also
reviewed the Registration Statement.

         In my  examination,  I have  assumed the legal  capacity of all natural
persons,  the genuineness of all signatures,  the  authenticity of all documents
submitted  to me as  originals,  the  conformity  to original  documents  of all
documents   submitted  to  me  as  certified  or  photostatic   copies  and  the
authenticity  of the  originals  of such  copies.  In making my  examination  of
documents  executed by parties other than the  Corporation,  I have assumed that
such parties had the power,  corporate  or other,  to enter into and perform all
obligations  thereunder  and have  also  assumed  the due  authorization  by all
requisite action, corporate or other, and execution and delivery by such parties
of  such  documents  and  that  such  documents  constitute  valid  and  binding
obligations of such parties. As to any facts material to this opinion that I did
not  independently  establish  or  verify,  I  have  relied  upon  certificates,
statements and representations of officers,  trustees and other  representatives
of the Corporation and others.

         I am a member  of the Bar of the  State of New York and do not  express
any  opinion  as to the laws of any  other  state or  jurisdiction.  Insofar  as
opinions  herein  expressed  relate to matters  governed by Delaware law, I have
relied  solely  upon  a  reading  of  applicable  statutes  and  records  of the
Corporation and certificates of public officials.

         Based  upon  and  subject  to  the  foregoing   and  the   limitations,
qualifications,  exceptions and assumptions set forth herein, I advise you that,
in my opinion:



         1. The Corporation has been duly  incorporated  and is validly existing
and in good standing under the laws of the State of Delaware.

         2. The shares of Common Stock initially  issuable pursuant to the Stock
Plan have been duly authorized by the  Corporation  and, when issued and sold by
the  Corporation in accordance  with the provisions of the Stock Plan, will have
been validly issued and will be fully paid and non-assessable.

         I hereby  consent to the filing of this opinion with the  Commission as
an exhibit  to the  Registration  Statement  and the  reference  to me under the
heading "Legal Matters" in the Registration Statement. In giving such consent, I
do not  thereby  admit that I am in the  category  of persons  whose  consent is
required under Section 7 of the  Securities Act or the rules and  regulations of
the  Commission  promulgated  thereunder.  As of March 11,  2005, I owned 6,250
restricted  shares of Common  Stock and  options to  purchase  35,000  shares of
Common Stock.

                                 Respectfully submitted,

                                 /s/ Beth R. Jacobson
                                 ----------------------------------------------
                                 Beth R. Jacobson, Esquire
                                 Executive Vice President, General Counsel and
                                   Corporate Secretary
                                 PDI, Inc.