Exhibit 31.4

Certification of Principal Financial Officer

I, Alicia Grande, certify that:

1. I have reviewed this Form 10-K/A of Catalyst Pharmaceuticals, Inc.; and

2. Based on my knowledge, this report 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 report.

Date: April 24, 2023

/s/ Alicia Grande

Alicia Grande

Chief Financial Officer

(Principal Financial Officer)