POWER OF ATTORNEY
                       FOR SEC FILINGS ON FORMS 3, 4 AND 5
                           IN RESPECT OF SECURITIES OF
                            HARBOR BIOSCIENCES, INC.

        The undersigned hereby constitutes and appoints Robert W. Weber, as his
true and lawful attorney-in-fact and agent, with full power of substitution and
resubstitution for her in her name and stead in any and all capacities, to sign
and file for and on her behalf, in respect of any acquisition, disposition or
other change in ownership of any shares of voting securities of Harbor
BioSciences, Inc. (the "Company"), the following:

(i)     any Initial Statement of Beneficial Ownership of Securities on Form 3 to
be filed with the Securities and Exchange Commission;
(ii)    any Statement of Changes of Beneficial Ownership of Securities on Form 4
to be filed with the Securities and Exchange Commission;
(iii)   any Annual Statement of Beneficial Ownership of Securities on Form 5 to
be filed with the Securities and Exchange Commission; and
(iv)    any and all agreements, certificates, receipts, or other documents in
connection therewith.

        The undersigned hereby gives full power and authority to the
attorney-in-fact to seek and 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 such information to the undersigned and approves and ratifies
any such release of information.

        The undersigned hereby grants unto such attorney-in-fact and agent full
power and authority to do and perform each and every act and thing requisite and
necessary in connection with such matters and hereby ratifies and confirms all
that any such attorney-in-fact and agent or substitute may do or cause to be
done by virtue hereof.

The undersigned acknowledges that:

(i)     neither the Company nor such attorney-in-fact assumes (i) any liability
for the undersigned's responsibility to comply with the requirement of the
Exchange Act,
(ii)    any liability of the undersigned for any failure to comply with such
requirements, or (iii) any obligation or liability of the undersigned for profit
disgorgement under Section 16(b) of the Exchange Act; and
(iii)   this Power of Attorney does not relieve the undersigned from
responsibility for compliance with the undersigned's obligations under the
Exchange Act, including without limitation the reporting requirements under
Section 16 of the Exchange Act.

        This Power of Attorney shall remain in full force and effect until
revoked by the undersigned in a signed writing delivered to such
attorney-in-fact.

        IN WITNESS WHEREOF, the undersigned has executed this Power of Attorney.

Date: August 22, 2011                   /s/ Richard A. Bartlett
                                        ----------------------------------------
                                        Richard A. Bartlett