Exhibit 5.1

September 10, 2021

Pasithea Therapeutics Corp.

1111 Lincoln Road

Suite 500

Miami Beach, FL 33139

Re:   Registration Statement on Form S-1

Ladies and Gentlemen:

We have acted as counsel to Pasithea Therapeutics Corp., a Delaware corporation (the “Company”), in connection with the preparation of the Company’s registration statement on Form S-1, Registration No. 333- 255205, under the Securities Act of 1933, as amended (the “Securities Act”), initially filed by the Company with the Securities and Exchange Commission (the “Commission”) on April 13, 2021, as thereafter amended or supplemented (the “Registration Statement”). The Registration Statement relates to the registration of the proposed offer and sale of (A) a proposed maximum aggregate offering price of $23,333,336 of common stock, par value $0.0001 per share (the “Common Stock” and each such share of Common Stock, a “Share” and collectively, the “Shares”) (B) a proposed maximum aggregate offering price of $29,166,664 of warrants (the “Common Stock Warrants”) to purchase shares of Common Stock (the “Common Stock Warrant Shares”) and (C) a proposed maximum aggregate offering price of $1,400,000 of warrants (the “Underwriter Warrants” and together with the Common Stock Warrants, the “Warrants”) to purchase shares of Common Stock (the “Underwriter Warrant Shares” and together with the Common Stock Warrant Shares, the “Warrant Shares”) to be issued to EF Hutton, division of Benchmark Investments, LLC (the “Underwriter”) as compensation for its services pursuant to an underwriting agreement to be entered into by and between the Company and the Underwriter, substantially in the form of which to be filed as Exhibit 1.1 to the Registration Statement (the “Underwriting Agreement”). The Shares and the Warrant Shares are collectively referred to as the “Securities.”

In rendering the opinion set forth herein, we have examined the originals, or photostatic or certified copies, of (i) the Amended and Restated Certificate of Incorporation and Bylaws of the Company, (ii) certain resolutions of the Board of Directors of the Company related to the filing of the Registration Statement, the authorization and issuance of the Securities and related matters, (iii) the Registration Statement and all exhibits thereto, (iv) the form of Warrant Agent Agreement to be entered into with VStock Transfer, LLC, as warrant agent (the “Warrant Agent”), including the form of Common Stock Warrant contained therein, (v) the form of Underwriting Agreement to be entered into with the Underwriter, (vi) the form of the Underwriter Warrant, and (vii) such other records, documents and instruments as we deemed relevant and necessary for purposes of the opinion stated herein.

In making the foregoing examination we have assumed the genuineness of all signatures, the legal capacity of all natural persons, the authenticity of all documents submitted to us as originals, the conformity to original documents of all documents submitted to us as photostatic or certified copies, and the authenticity of the originals of such copies. As to all questions of fact material to this opinion, where such facts have not been independently established, we have relied, to the extent we have deemed reasonably appropriate, upon representations or certificates of officers of the Company or governmental officials.

We have assumed that the specific terms of the sale of Securities will be duly authorized by the Board of Directors of the Company, a duly authorized committee thereof or a person or body pursuant to an authorization granted in accordance with Section 152 of the General Corporation Law of the State of Delaware.

We do not express any opinion herein concerning any law other than the General Corporation Law of the State of Delaware.

Based upon the foregoing, and subject to the qualifications, assumptions, limitations and exceptions stated herein, we are of the opinion that:

This opinion speaks only as of the date hereof. We expressly disclaim any responsibility to advise you of any development or circumstance of any kind, including any change of law or fact, that may occur after the date of this opinion that might affect the opinions expressed therein.

We hereby consent to the submission of this opinion to the Commission as an exhibit to the Registration Statement. We hereby also consent to the reference to our firm under the caption “Legal Matters” in the Registration Statement. We do not admit in providing such consent that we are included within the category of persons whose consent is required under Section 7 of the Securities Act and the rules and regulations of the Commission thereunder.