LIMITED POWER OF ATTORNEY FOR SECTION 16 REPORTING OBLIGATIONS

     Know all by these presents, that the undersigned hereby constitutes and
appoints Willkie Farr & Gallagher LLP the undersigned's true and lawful
attorney-in-fact to:

     1.  execute for and on behalf of the undersigned, in the undersigned's
         capacity as a director and officer of Sarissa Capital Acquisition Corp.
         (the "Company"), Forms 3, 4 and 5 (and any amendments thereto) in
         accordance with Section 16(a) of the Securities Exchange Act of 1934,
         as amended (the "Exchange Act"), and the rules thereunder;

     2.  do and perform any and all acts for and on behalf of the undersigned
         which may be necessary or desirable to complete and execute any such
         Form 3, 4 or 5, complete and execute any amendments thereto, and timely
         file such form with the U.S. Securities and Exchange Commission (the
         "SEC") and any securities exchange or similar authority, including
         without limitation the filing of a Form ID or any other documents
         necessary or appropriate to enable the undersigned to file the Forms 3,
         4 and 5 electronically with the SEC;

     3.  seek or obtain, as the undersigned's representative and on the
         undersigned's behalf, information on transactions in the Company's
         securities from any third party, including brokers, employee benefit
         plan administrators and trustees, and the undersigned hereby authorizes
         any such person to release any such information to the undersigned's
         attorney-in-fact appointed by this Limited Power of Attorney and
         approves and ratifies any such release of information; and

     4.  take any other action in connection with the foregoing which, in
         the opinion of such attorney-in-fact, may be of benefit to, in the best
         interest of, or legally required by or for, the undersigned, it being
         understood that the documents executed by such attorney-in-fact on
         behalf of the undersigned pursuant to this Limited Power of Attorney
         shall be in such form and shall contain such information and disclosure
         as such attorney-in-fact may approve in such attorney-in-fact's
         discretion.

         The undersigned hereby grants to such attorney-in-fact full power and
authority to do and perform any and every act and thing whatsoever required,
necessary or proper to be done in the exercise of any of the rights and powers
herein granted, as fully to all intents and purposes as the undersigned might or
could do if personally present, with full power of substitution or revocation,
hereby ratifying and confirming all that such attorney-in-fact, or such
attorney-in-fact's substitute or substitutes, shall lawfully do or cause to be
done by virtue of this Limited Power of Attorney and the rights and powers
herein granted.

         The undersigned acknowledges that the foregoing attorney-in-fact, in
serving in such capacity at the request and on the behalf of the undersigned, is
not assuming, nor is the Company assuming, any of the undersigned's
responsibilities to comply with, or any liability for the failure to comply
with, any provision of Section 16 of the Exchange Act.

         This Limited Power of Attorney shall remain in full force and effect
until the undersigned is no longer required to file Forms 3, 4 or 5 with respect
to the undersigned's holdings of and transactions in securities issued by the
Company, unless earlier revoked by the undersigned in a signed writing delivered
to each of the foregoing attorney-in-fact.

         IN WITNESS WHEREOF, the undersigned has executed this Limited Power of
Attorney as of this 29th day of October, 2020.

                                   Signed and acknowledged:



                                /s/ Alexander Denner
                               -----------------------------------------
                                              Signature


                                         Alexander Denner, Ph.D.
                               -----------------------------------------
                                             Printed Name