Exhibit 31.4
CERTIFICATION
I, Robert E. Hoffman, certify that:
| 1. | I have reviewed this Amendment No. 1 on Form 10-K/A of Arena Pharmaceuticals, Inc., or Amendment; and |
| 2. | Based on my knowledge, this Amendment does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this Amendment. |
| Date: April 28, 2009 | ||
/s/ ROBERT E. HOFFMAN Robert E. Hoffman, VP, Finance and Chief Financial Officer |
