JOINT FILING AGREEMENT
EXHIBIT 99.02
Each of the undersigned hereby agrees and consents that the Schedule 13D filed herewith (the
“Schedule 13D”) by Cornerstone BioPharma
Holdings, Inc. (“CBPHI”) is filed on behalf of each of
them pursuant to the authorization of the undersigned to make such filing and that such Schedule
13D is filed jointly on behalf of each of them, pursuant to Sections 13(d) and 13(g) of the
Securities Exchange Act of 1934, as amended, and the rules promulgated thereunder, including Rule
13d-1(k)(1). Each of the undersigned hereby agrees that such Schedule 13D is, and any further
amendments to the Schedule 13D will be, filed on behalf of each of the undersigned. Each of the
persons is not responsible for the completeness or accuracy of the information concerning the other
persons making this filing unless such person knows or has reason to believe that such information
is inaccurate. This agreement may be signed in counterparts. This agreement is effective as of
May 9, 2008.
| CORNERSTONE BIOPHARMA HOLDINGS, INC. |
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| Dated: May 9, 2008 | By: | /s/ Xxxxx X. Xxxxxxx | ||
| Name: | Xxxxx X. Xxxxxxx | |||
| Title: | President and Chief Executive Officer | |||
| CORNERSTONE BIOPHARMA HOLDINGS, LTD. |
||||
| By: | /s/ Xxxxx X. Xxxxxxx | |||
| Name: | Xxxxx X Xxxxxxx | |||
| Title: | President and Chief Executive Officer | |||
| /s/ Xxxxx X. Xxxxxxx | ||||
| Xxxxx X. Xxxxxxx | ||||
