Exhibit 4.3

NEITHER THIS SECURITY NOR THE SECURITIES INTO WHICH THIS SECURITY IS CONVERTIBLE HAVE BEEN REGISTERED WITH THE U.S. SECURITIES AND EXCHANGE COMMISSION OR THE SECURITIES COMMISSION OF ANY STATE IN RELIANCE UPON AN EXEMPTION FROM REGISTRATION UNDER THE SECURITIES ACT OF 1933, AS AMENDED (THE “SECURITIES ACT”), AND, ACCORDINGLY, MAY NOT BE OFFERED OR SOLD EXCEPT PURSUANT TO AN EFFECTIVE REGISTRATION STATEMENT UNDER THE SECURITIES ACT OR PURSUANT TO AN AVAILABLE EXEMPTION FROM, OR IN A TRANSACTION NOT SUBJECT TO, THE REGISTRATION REQUIREMENTS OF THE SECURITIES ACT AND IN ACCORDANCE WITH APPLICABLE STATE SECURITIES LAWS. THIS SECURITY AND THE SECURITIES ISSUABLE UPON CONVERSION OF THIS SECURITY MAY BE PLEDGED IN CONNECTION WITH A BONA FIDE MARGIN ACCOUNT OR OTHER LOAN SECURED BY SUCH SECURITIES.

Original Issue Date: March [●], 2024

Original Conversion Price (subject to adjustment herein): $0.14

$[●]

UNSECURED CONVERTIBLE NOTE

DUE MARCH [●], 2026

THIS UNSECURED CONVERTIBLE NOTE is one of a series of duly authorized and validly issued Unsecured Convertible Note of NovaBay Pharmaceuticals, Inc., a Delaware corporation (the “Company”), having its principal place of business at 2000 Powell Street, Suite 1150, Emeryville, CA 94608, designated as its Unsecured Convertible Note, due March [●], 2026 (the “Note”). This Note has been issued pursuant to the First Amendment to the Security Agreement, dated March 24, 2024 (“First Amendment”) and is subject to certain investment representations of the Holder set forth in the First Amendment.

FOR VALUE RECEIVED, the Company promises to pay to [●] or its permitted registered assigns (the “Holder”), or shall have paid pursuant to the terms hereunder, the principal sum of US$[●] (as reduced by any prepayments of principal or conversions of principal, the “Principal Amount”) on March [●], 2026 (the “Maturity Date”) or such earlier date as this Note is required or permitted to be repaid as provided hereunder. This Note is subject to the following additional provisions:

Section 1.         Interest. There shall not be any interest due and/or payable on the Principal Amount of this Note. Accordingly, there shall be no interest payments made by the Company to the Holder pursuant to this Note.

Section 2.   Principal Amount and Redemption. The Company will pay the Principal Amount on the Maturity Date, provided, however, that in the event that the Company is not able to obtain the Stockholder Approval on or before the six (6) month anniversary of the Original Issue Date (the “Stockholder Approval Deadline”), then the obligation to pay the Note shall accelerate and be payable by the Company to the Holder promptly after the Stockholder Approval Deadline. All or any portion of this Note may be prepaid at any time and from time to time by the Company without penalty.  

Section 3.   Method of Payment. Unless otherwise converted as provided in Section 4 below, the Principal Amount of this Note is payable in United States dollars at the address of the Holder appearing on the signature page hereof, as the same may be updated by the Holder by written notice from time to time. Payments may be made by check to the address of the Holder or by wire transfer to an account designated in writing by the Holder.

Section 4.   Conversion.

(a)     Voluntary Conversion. Until the full Principal Amount has been paid to the Holder, this Note shall be convertible, in whole or in part, into shares (“Conversion Shares”) of Company common stock, par value $0.01 per share (“Common Stock”) at the option of the Holder, at any time and from time to time only on or after the Conversion Date (subject to the conversion limitation set forth in Section 4(d)). The “Conversion Date” is the date that the Company obtains stockholder approval to permit the conversion of up to the full amount of the Principal Amount into Conversion Shares as provided herein, including as may be required by the applicable rules and regulations of the NYSE American LLC (or any successor entity) (the “Stockholder Approval”). The Holder shall effect conversions by delivering to the Company a Notice of Conversion, the form of which is attached hereto as Annex A (each, a “Notice of Conversion”), specifying therein the Principal Amount to be converted and the date on which such conversion shall be effected, which date may not be prior to the date the Holder delivers such Notice of Conversion to the Company (such date, the “Conversion Date”). If no Conversion Date is specified in a Notice of Conversion, the Conversion Date shall be the date that such Notice of Conversion is deemed delivered hereunder. No ink-original Notice of Conversion shall be required, nor shall any medallion guarantee (or other type of guarantee or notarization) of any Notice of Conversion form be required. To effect conversions hereunder, the Holder shall not be required to physically surrender this Note to the Company unless the entire Principal Amount has been so converted in which case the Holder shall surrender this Note as promptly as is reasonably practicable after such conversion without delaying the Company’s obligation to deliver the shares on the Share Delivery Date. Conversions hereunder shall have the effect of lowering the outstanding Principal Amount in an amount equal to the applicable conversion. The Holder and the Company shall maintain records showing the Principal Amount(s) converted and the date of such conversion(s) and the remaining Principal Amount that is outstanding under the Note after such conversion(s). The portion or all of the Note converted into shares of Common Stock or prepaid in accordance with the terms hereof (regardless of delivery of the Note) shall be deemed paid to the Holder and reduce the amounts owned by the Company under this Note. The Company may deliver an objection to any Notice of Conversion within one (1) business day of delivery of such Notice of Conversion. For purposes of this Note, “business day” means any day that is not a Saturday, Sunday, or other day on which commercial banks in the City of New York, New York are required by law to be closed. The Holder, and any assignee by acceptance of this Note, acknowledge and agree that, by reason of the provisions of this paragraph, following conversion of a portion of this Note, the unpaid and unconverted Principal Amount of this Note may be less than the amount stated on the face hereof.

(b)    Conversion Price. The conversion price in effect on any Conversion Date shall be equal to $0.14, subject to adjustment herein (as equitably adjusted to reflect subsequent stock dividends, stock splits, combinations or recapitalizations, the “Conversion Price”).

(c)    Mechanics of Conversion.

(i)    Conversion Shares Issuable Upon Conversion of Principal Amount. The number of Conversion Shares issuable upon a conversion hereunder shall be determined by the quotient obtained by dividing (x) the outstanding Principal Amount to be converted by (y) the Conversion Price.

(ii)    Delivery of Conversion Shares Upon Conversion. Not later than three (3) business days after receipt of the Conversion Notice (the “Share Delivery Date”), the Company shall deliver, or cause to be delivered, to the Holder the Conversion Shares, which the Company and the Holder acknowledge and agree are subject to the transfer restrictions and obligations, as well as registration rights set forth in the First Amendment.

(iii)    Failure to Deliver Conversion Shares. If, in the case of any Notice of Conversion, such Conversion Shares are not delivered to or as directed by the applicable Holder by the Share Delivery Date, the Holder shall be entitled to elect by written notice to the Company at any time on or before its receipt of such Conversion Shares, to rescind such conversion, in which event the Company shall promptly return to the Holder any original Note delivered to the Company and the Holder shall promptly return to the Company the Conversion Shares issued to such Holder pursuant to the rescinded Notice of Conversion.

(iv)    Reservation of Shares Issuable Upon Conversion. The Company covenants that it will at all times reserve and keep available out of its authorized and unissued shares of Common Stock for the sole purpose of issuance upon conversion of this Note, each as herein provided, free from preemptive rights or any other actual contingent purchase rights of persons other than the Holder, not less than such aggregate number of shares of the Common Stock as shall be issuable (taking into account, if applicable, adjustments to reflect subsequent stock dividends, stock splits, combinations or recapitalizations) upon the conversion of the then outstanding Principal Amount. The Company covenants that all shares of Common Stock that shall be so issuable shall, upon issue, be duly authorized, validly issued, fully paid and nonassessable.

(v)         Fractional Shares. No fractional shares or scrip representing fractional shares shall be issued upon the conversion of this Note. As to any fraction of a share which the Holder would otherwise be entitled to purchase upon such conversion, the Company shall at its election, either pay a cash adjustment in respect of such final fraction in an amount equal to such fraction multiplied by the Conversion Price or round up to the next whole share.

(vi)         Transfer Taxes and Expenses. The issuance of Conversion Shares on conversion of this Note shall be made without charge to the Holder hereof for any documentary stamp or similar taxes that may be payable in respect of the issue or delivery of such Conversion Shares, provided that the Company shall not be required to pay any tax that may be payable in respect of any transfer involved in the issuance and delivery of any such Conversion Shares upon conversion in a name other than that of the Holder of this Note so converted and the Company shall not be required to issue or deliver such Conversion Shares unless or until the person or persons requesting the issuance thereof shall have paid to the Company the amount of such tax or shall have established to the satisfaction of the Company that such tax has been paid.

(d)    Holder’s Conversion Limitations. The Company shall not effect any conversion of this Note, and a Holder shall not have the right to convert any portion of this Note, to the extent that after giving effect to the conversion set forth on the applicable Notice of Conversion, the Holder (together with the Holder’s Affiliates, and any other Persons acting as a group together with the Holder or any of the Holder’s Affiliates (such Persons, “Attribution Parties”)) would beneficially own in excess of the Beneficial Ownership Limitation (as defined below). For purposes of the foregoing sentence, the number of shares of Common Stock beneficially owned by the Holder and its Affiliates and Attribution Parties shall include the number of shares of Common Stock issuable upon conversion of this Note with respect to which such determination is being made, but shall exclude the number of shares of Common Stock which would be issuable upon (i) conversion of the remaining, unconverted principal amount of this Note beneficially owned by the Holder or any of its Affiliates or Attribution Parties and (ii) exercise or conversion of the unexercised or unconverted portion of any other securities of the Company subject to a limitation on conversion or exercise analogous to the limitation contained herein (including, without limitation, any other convertible debt or equity securities of the Company or warrants) beneficially owned by the Holder or any of its Affiliates or Attribution Parties. Except as set forth in the preceding sentence, for purposes of this Section 4(d), beneficial ownership shall be calculated in accordance with Section 13(d) of the Securities Exchange Act of 1934, as amended (the “Exchange Act”) and the rules and regulations promulgated thereunder. To the extent that the limitation contained in this Section 4(d) applies, the determination of whether this Note is convertible (in relation to other securities owned by the Holder together with any Affiliates and Attribution Parties) and of which principal amount of this Note is convertible shall be in the sole discretion of the Holder, and the submission of a Notice of Conversion shall be deemed to be the Holder’s good faith determination of whether this Note may be converted (in relation to other securities owned by the Holder together with any Affiliates or Attribution Parties) and which principal amount of this Note is convertible, in each case subject to the Beneficial Ownership Limitation. To ensure compliance with this restriction, each Holder will be deemed to represent to the Company each time it delivers a Notice of Conversion that such Notice of Conversion is in compliance with the restrictions set forth in Section 4 of the Note, and the Company shall have no obligation to verify or confirm the accuracy of such determination and shall have no liability to the Holder for any such conversions of the Note that are not in compliance with the Beneficial Ownership Limitation (other than as a result of a Holder’s reliance on the number of issued and outstanding shares of Common Stock pursuant to this Section 4(d)). In addition, a determination as to any group status as contemplated above shall be determined in accordance with Section 13(d) of the Exchange Act and the rules and regulations promulgated thereunder. For purposes of this Section 4(d), in determining the number of outstanding shares of Common Stock, the Holder may rely on the number of outstanding shares of Common Stock as reflected in (A) the Company’s most recent periodic or annual report filed with the U.S. Securities and Exchange Commission, as the case may be, (B) a more recent public announcement by the Company, or (C) a more recent written notice by the Company or the Company’s transfer agent setting forth the number of shares of Common Stock outstanding. Upon the written or oral request of a Holder, the Company shall within one Trading Day confirm orally and in writing to the Holder the number of shares of Common Stock then outstanding. In any case, the number of outstanding shares of Common Stock shall be determined after giving effect to the conversion or exercise of securities of the Company, including this Note, by the Holder or its Affiliates since the date as of which such number of outstanding shares of Common Stock was reported. The “Beneficial Ownership Limitation” shall be 4.99% of the number of shares of the Common Stock outstanding immediately after giving effect to the issuance of shares of Common Stock issuable upon conversion of this Note by the Holder. The Holder, upon written notice to the Company, may increase or decrease the Beneficial Ownership Limitation provisions of this Section 4(d), provided that the Beneficial Ownership Limitation in no event exceeds 9.99% of the number of shares of the Common Stock outstanding immediately after giving effect to the issuance of shares of Common Stock upon conversion of this Note held by the Holder and the Beneficial Ownership Limitation provisions of this Section 4(d) shall continue to apply. Any increase in the Beneficial Ownership Limitation will not be effective until the 61^st day after such notice is delivered to the Company. The Beneficial Ownership Limitation provisions of this paragraph shall be construed and implemented in a manner otherwise than in strict conformity with the terms of this Section 4(d) to correct this paragraph (or any portion hereof) which may be defective or inconsistent with the intended Beneficial Ownership Limitation contained herein or to make changes or supplements necessary or desirable to properly give effect to such limitation. The limitations contained in this paragraph shall apply to a successor holder of this Note.

Section 5.   Unsecured Obligation. This Note and the Principal Amount payable hereunder is an unsecured obligation of the Company.

Section 6.   Events of Default. If more than one of the following described “Events of Default” shall occur:

(a) the Company shall fail to pay all of the Principal Amount on the Maturity Date that is not cured within ten (10) business days; or

(b) the Company shall fail to perform or observe any other covenant, provision, condition, agreement or obligation of the Company under this Note and such failure shall continue uncured for a period of twenty (20) days after notice from the Holder of such failure; or

(c) the Company shall make an assignment for the benefit of creditors or commence proceedings for its dissolution; or apply for or consent to the appointment of a trustee, liquidator or receiver for it or for a substantial part of its property or business; or

(d) a trustee, liquidator or receiver shall be appointed for the Company or for a substantial part of its property or business without its consent and shall not be discharged within thirty (30) days after such appointment; or

(e) any governmental authority or any court of competent jurisdiction at the instance of any governmental authority shall assume custody or control of the whole or any substantial portion of the properties or assets of the Company and shall not be dismissed within thirty (30) days thereafter; or

(f) bankruptcy, reorganization, insolvency or liquidation proceedings or other proceedings for relief under any bankruptcy law or any law for the relief of debtors shall be instituted by or against the Company and if instituted against the Company, shall not be dismissed, stayed or bonded within sixty (60) days after such institution or the Company shall by any action or answer approve of, consent to, or acquiesce in any such proceedings or admit the material allegations of, or default in answering a petition filed in any such proceeding;

then, or at any time thereafter, and in each and in every such case, unless such Event of Default shall have been waived in writing by the Holder (which waiver shall not be deemed to be a waiver of any subsequent default), the Holder may consider this Note immediately due or payable, without presentment, demand, protest or notice of any kind, all of which are expressly waived, anything herein or other instruments contained to the contrary notwithstanding, and the Holder may immediately demand without expiration of any period of grace, enforce any and all of the Holder’s rights and remedies provided herein or any other rights or remedies afforded by law.

Section 7.   Miscellaneous.

(a)     Notices. Any and all notices or other communications or deliveries to be provided by the Holder hereunder, including, without limitation, any Notice of Conversion, shall be in writing and delivered personally, by email attachment, or sent by a nationally recognized overnight courier service, addressed to the Company, at the address set forth above, or such other email address, or address as the Company may specify for such purposes by notice to the Holder delivered in accordance with this Section 7(a). Any and all notices or other communications or deliveries to be provided by the Company hereunder shall be in writing and delivered personally, by email attachment, or sent by a nationally recognized overnight courier service addressed to each Holder at the email address or address of the Holder appearing on the books of the Company, or if no such email attachment or address appears on the books of the Company, at the principal place of business of such Holder, as provided in the First Amendment. Any notice or other communication or deliveries hereunder shall be deemed given and effective on the earliest of (i) the date of transmission, if such notice or communication is delivered via email attachment to the email address set forth on the signature pages attached hereto prior to 5:30 p.m. (New York City time) on any date, (ii) the next business day after the date of transmission, if such notice or communication is delivered via email attachment to the email address set forth on the signature pages attached hereto on a day that is not a business day or later than 5:30 p.m. (New York City time) on any business day, (iii) the second business day following the date of mailing, if sent by U.S. nationally recognized overnight courier service or (iv) upon actual receipt by the party to whom such notice is required to be given.

(b)    Unsecured Obligation; Cancellation. This Note is a direct unsecured debt obligation of the Company. Upon the indefeasible repayment by the Company of all of its obligations hereunder to the Holder, including, without limitation, the principal amount of this Note, the indebtedness evidenced hereby shall be deemed canceled and paid in full, and the Holder shall promptly surrender the Note to the Company, which shall be destroyed.

(c)    Lost or Mutilated Note. If this Note shall be mutilated, lost, stolen or destroyed, the Company shall execute and deliver, in exchange and substitution for and upon cancellation of a mutilated Note, or in lieu of or in substitution for a lost, stolen or destroyed Note, a new Note for the principal amount of this Note so mutilated, lost, stolen or destroyed, but only upon receipt of evidence of such loss, theft or destruction of such Note, and of the ownership hereof, reasonably satisfactory to the Company.

(d)    Governing Law. All questions concerning the construction, validity, enforcement and interpretation of this Note shall be governed by and construed and enforced in accordance with the internal laws of the State of New York, without regard to the principles of conflict of laws thereof. Each party agrees that all legal proceedings concerning the interpretation, enforcement and defense of the transactions contemplated by the Note, the First Amendment and other transaction documents (whether brought against a party hereto or its respective Affiliates, directors, officers, shareholders, employees or agents) shall be commenced in the state and federal courts sitting in the City of New York, Borough of Manhattan (the “New York Courts”). Each party hereto hereby irrevocably submits to the exclusive jurisdiction of the New York Courts for the adjudication of any dispute hereunder or in connection herewith or with any transaction contemplated hereby or discussed herein (including with respect to the enforcement of any of the Note, the First Amendment and other transaction documents), and hereby irrevocably waives, and agrees not to assert in any suit, action or proceeding, any claim that it is not personally subject to the jurisdiction of such New York Courts, or such New York Courts are improper or inconvenient venue for such proceeding. Each party hereby irrevocably waives personal service of process and consents to process being served in any such suit, action or proceeding by mailing a copy thereof via registered or certified mail or overnight delivery (with evidence of delivery) to such party at the address in effect for notices to it under this Note and agrees that such service shall constitute good and sufficient service of process and notice thereof. Nothing contained herein shall be deemed to limit in any way any right to serve process in any other manner permitted by applicable law. Each party hereto hereby irrevocably waives, to the fullest extent permitted by applicable law, any and all right to trial by jury in any legal proceeding arising out of or relating to this Note or the transactions contemplated hereby.

(e)    Waiver. Any waiver by the Company or the Holder of a breach of any provision of this Note shall not operate as or be construed to be a waiver of any other breach of such provision or of any breach of any other provision of this Note. The failure of the Company or the Holder to insist upon strict adherence to any term of this Note on one or more occasions shall not be considered a waiver or deprive that party of the right thereafter to insist upon strict adherence to that term or any other term of this Note on any other occasion. Any waiver by the Company or the Holder must be in writing.

(f)    Severability. If any provision of this Note is invalid, illegal or unenforceable, such provision shall be adjusted rather than voided, if possible, so that its enforceable to the maximum extent possible, and the validity and enforceability of the remaining provisions of this Note will not in any way be affected impaired thereby.

(g)    Next Business Day. Whenever any payment or other obligation hereunder shall be due on a day other than a business day, such payment shall be made on the next succeeding business day.

(h)    Headings. The headings contained herein are for convenience only, do not constitute a part of this Note and shall not be deemed to limit or affect any of the provisions hereof.

Section 8.          Disclosure. Upon receipt or delivery by the Company of any notice in accordance with the terms of this Note, unless the Company has in good faith determined that the matters relating to such notice do not constitute material, nonpublic information relating to the Company or its subsidiaries, the Company shall within two (2) business days after such receipt or delivery publicly disclose such material, nonpublic information on a Current Report on Form 8-K or otherwise. In the event that the Company believes that a notice contains material, non-public information relating to the Company or its subsidiaries, the Company so shall indicate to the Holder contemporaneously with delivery of such notice, and in the absence of any such indication, the Holder shall be allowed to presume that all matters relating to such notice do not constitute material, nonpublic information relating to the Company or its subsidiaries.

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(Signature Page Follows)

IN WITNESS WHEREOF, the Company has caused this Note to be duly executed by a duly authorized officer as of the date first above indicated.

NOVABAY PHARMACEUTICALS, INC.
By:
	Name: Justin M. Hall
	Title: Chief Executive Officer and General Counsel

ANNEX A

NOTICE OF CONVERSION

The undersigned hereby elects to convert principal under the Convertible Unsecured Note due March [●], 2026 of NovaBay Pharmaceuticals, Inc., a Delaware corporation (the “Company”), into shares of common stock, par value $0.01 per share (the “Common Stock”), of the Company according to the conditions hereof, as of the date written below. If shares of Common Stock are to be issued in the name of a person other than the undersigned, the undersigned will pay all transfer taxes payable with respect thereto and is delivering herewith such certificates and opinions as reasonably requested by the Company in accordance therewith. No fee will be charged to the holder for any conversion, except for such transfer taxes, if any.

By the delivery of this Notice of Conversion the undersigned represents and warrants to the Company that its ownership of the Common Stock does not exceed the amounts specified under Section 4 of this Note, as determined in accordance with Section 13(d) of the Exchange Act.

The undersigned agrees to comply with the prospectus delivery requirements under the applicable securities laws in connection with any transfer of the aforesaid shares of Common Stock.

Conversion calculations:

Date to Effect Conversion:

Principal Amount of Note to be Converted:

Number of shares of Common Stock to be issued:

Signature:

Name:

Address for Delivery of Common Stock Certificates:

Or

DWAC Instructions:

Broker No:                                        

Account No: