Document:

Exhibit 4.6

  

STOCK PURCHASE WARRANT

TO SUBSCRIBE FOR AND
PURCHASE COMMON STOCK OF 

NEUROMETRIX, INC.

 

	No. CSW-	, 2012

  

THIS CERTIFIES THAT, for value received, Dawson James Securities,
Inc., or registered assigns, (herein referred to as the "Purchaser" or "Holder"), is entitled to subscribe
for and purchase from NEUROMetrix, Inc., a Delaware corporation (herein called the "Company"), at the exercise price
specified below (subject to adjustment as noted below) at any time beginning on the date indicated in (1) below and ending on the
date indicated in (2) below (subject to extension as provided below, the "Expiration Date"), (____________) fully paid
and nonassessable shares ("Shares") of common stock, par value $.0001 per share (herein the "Common Stock")
(subject to adjustment as noted below). This Stock Purchase Warrant (this "Warrant") has been registered on the Company’s
Registration Statement on Form S-1 (the “Registration Statement”) filed with the U.S. Securities and Exchange Commission
(the “SEC”) on November 23, 2011, as amended.

 

The warrant exercise price (subject to adjustment as noted below)
shall be $________ per Share (the "Warrant Purchase Price").

 

This Warrant is subject to the following provisions, terms and conditions:

 

(1)          Insert
date that is twelve months after the date hereof: __________

 

(2)          Insert
date that is five years from the effective date of the Registration Statement: ____________

 

1.          EXERCISE
OF WARRANT. The rights represented by this Warrant may be exercised by the holder hereof, in whole or in part, by written notice
of exercise (the “Exercise Notice”) delivered to the Company and by the surrender of this Warrant (unless the Warrant
is issued in book entry form), properly endorsed if required, to the offices of the Company (or such other location specified by
the Company) and upon payment to it by check or wire transfer of funds to an account specified by the Company of the Warrant Purchase
Price for such Shares, or if available, pursuant to the cashless exercise procedure specified in Section 2 below. Such Exercise
Notice shall be in the form set forth in Exhibit A.

 

2.          NET
EXERCISE OF WARRANT. This Warrant may also be exercised in whole or in part, at such time by means of a "cashless exercise"
in which the holder shall be entitled to receive a certificate for the number of Shares equal to the quotient obtained by dividing
[(A-B)(X)] by (A), where:

 

	 	(A) =	the VWAP on the trading day immediately preceding the date on which the holder elects to exercise this Warrant by means of a "cashless exercise," as set forth in the applicable Notice of Exercise;

 

    	 

    	 

    

 

	 	(B) =	the Warrant Purchase Price, as adjusted hereunder; and

 

	 	(X) =	the number of Shares that would be issuable upon exercise of this Warrant in accordance with the terms of this Warrant if such exercise were by means of a cash exercise rather than a cashless exercise.

 

"VWAP" means, for any date, the price determined by the
first of the following clauses that applies: (a) if the Common Stock is then listed or quoted on a Trading Market, the daily volume
weighted average price of the Common Stock for such date (or the nearest preceding date) on the Trading Market on which the Common
Stock is then listed or quoted as reported by Bloomberg L.P. (based on a trading day from 9:30 a.m. (New York City time) to 4:02
p.m. (New York City time), (b) if the OTC Bulletin Board is not a Trading Market, the volume weighted average price of the Common
Stock for such date (or the nearest preceding date) on the OTC Bulletin Board, (c) if the Common Stock is not then listed or quoted
for trading on the OTC Bulletin Board and if prices for the Common Stock are then reported in the "Pink Sheets" published
by Pink OTC Markets, Inc. (or a similar organization or agency succeeding to its functions of reporting prices), the most recent
bid price per share of the Common Stock so reported, or (d) in all other cases, the fair market value of a share of Common Stock
as determined by an independent appraiser selected in good faith by the Board of Directors of the Company and the holders of a
majority in interest of the Warrants being exercised for which the calculation of VWAP is required in order to determine the exercise
price of such Warrants.

 

“Trading Market" means any of the following markets or
exchanges on which the Common Stock is listed or quoted for trading on the date in question: the NYSE AMEX, the Nasdaq Capital
Market, the Nasdaq Global Market, the Nasdaq Global Select Market, or the New York Stock Exchange (or any successors to any of
the foregoing).

 

3.          BENEFICIAL
OWNERSHIP.

 

(a)          Notwithstanding
anything to the contrary contained in this Warrant (other than the provisions of Section 3(b) below), the Company shall not effect
any exercise of this Warrant, and a holder shall not have the right to exercise any portion of this Warrant to the extent (but
only to the extent) that, after giving effect to such issuance after exercise, the holder (together with any person acting as a
group with the holder or the holder's affiliates) would beneficially own in excess of 9.99% (the "Maximum Percentage")
of the outstanding shares of Common Stock. To the extent the above limitation applies, the determination of whether this Warrant
shall be exercisable (vis-à-vis other convertible, exercisable or exchangeable securities owned by the holder) and of which
warrants shall be exercisable (as among all warrants owned by the holder) shall, subject to such Maximum Percentage limitation,
be determined on the basis of the first submission to the Company for conversion, exercise or exchange (as the case may be). No
prior inability to exercise this Warrant pursuant to this paragraph shall have any effect on the applicability of the provisions
of this paragraph with respect to any subsequent determination of exercisability. For the purposes of this paragraph, beneficial
ownership and all determinations and calculations (including, without limitation, with respect to calculations of percentage ownership
and as to the determination of any group) shall be determined by the holder in accordance with Section 13(d) of the Securities
Exchange Act of 1934 (the "Exchange Act") and the rules and regulations promulgated thereunder. The provisions of this
paragraph shall be implemented in a manner otherwise than in strict conformity with the terms of this paragraph to correct this
paragraph (or any portion hereof) which may be defective or inconsistent with the intended Maximum Percentage beneficial ownership
limitation herein contained or to make changes or supplements necessary or desirable to properly give effect to such Maximum Percentage
limitation. The limitations contained in this paragraph shall apply to a successor holder of this Warrant. Each delivery of an
Exercise Notice by the holder will constitute a representation by the holder that it has evaluated the limitation set forth in
this paragraph and determined that issuance of the full number of Shares requested by the holder in such Exercise Notice is permitted
under this paragraph.

 

    	 

    	 

    
 

(b)          The
provisions of Section 3(a) above shall not apply to any exercise by any holder whose beneficial ownership of Common Stock immediately
prior to the issuance of this Warrant (together with any person acting as a group with the holder and the holder's affiliates)
exceeds the Maximum Percentage (an "Existing MP Holder"), provided, however, if at any time after the date hereof an
Existing MP Holder and its affiliates and any other persons or entities whose beneficial ownership of Common Stock would be aggregated
with such Holders for purposes of Section 13(d) of the Exchange Act (including shares held by any "group" of which the
holder is a member, but excluding shares beneficially owned by virtue of the ownership of securities or rights to acquire securities
that have limitations on the right to convert, exercise or purchase similar to the limitation set forth herein) shall collectively
beneficially own the Maximum Percentage or less, then such holder may deliver a written notice to the Company (an "MP Notice")
providing that such holder irrevocably elects to be subject to the provisions of Section 3(a).

 

(c)          Notwithstanding
anything to the contrary contained in this Warrant, the Company shall not effect any exercise of this Warrant (including if held
by an Existing MP Holder that has not delivered an MP Notice), and a holder shall not have the right to exercise any portion of
this Warrant to the extent (but only to the extent) that, after giving effect to such issuance after exercise, the holder (together
with any person acting as a group with the holder or the holder's affiliates) would beneficially own in excess of 14.99% (the "Applicable
Percentage") of the outstanding shares of Common Stock. To the extent the above limitation applies, the determination of whether
this Warrant shall be exercisable (vis-à-vis other convertible, exercisable or exchangeable securities owned by the holder)
and of which warrants shall be exercisable (as among all warrants owned by the holder) shall, subject to such Applicable Percentage
limitation, be determined on the basis of the first submission to the Company for conversion, exercise or exchange (as the case
may be). No prior inability to exercise this Warrant pursuant to this paragraph shall have any effect on the applicability of the
provisions of this paragraph with respect to any subsequent determination of exercisability. For the purposes of this paragraph,
beneficial ownership and all determinations and calculations (including, without limitation, with respect to calculations of percentage
ownership and as to the determination of any group) shall be determined by the holder in accordance with Section 13(d) of the Securities
Exchange Act of 1934, as amended, and the rules and regulations promulgated thereunder. The provisions of this paragraph shall
be implemented in a manner otherwise than in strict conformity with the terms of this paragraph to correct this paragraph (or any
portion hereof) which may be defective or inconsistent with the intended Applicable Percentage beneficial ownership limitation
herein contained or to make changes or supplements necessary or desirable to properly give effect to such Applicable Percentage
limitation. The limitations contained in this paragraph shall apply to a successor holder of this Warrant. . Each delivery of an
Exercise Notice by the holder will constitute a representation by the holder that it has evaluated the limitation set forth in
this paragraph and determined that issuance of the full number of Shares requested by the holder in such Exercise Notice is permitted
under this paragraph.

 

    	 

    	 

    
 

4.          ISSUANCE
OF THE SHARES.

 

(a)          The
Company agrees that the Shares so purchased shall be and are deemed to be issued to the holder hereof as the record owner of such
Shares as of the close of business on the date on which this Warrant shall have been surrendered and payment made for such Shares
as aforesaid. Subject to the provisions of the preceding Section, within 10 business days after the rights represented by this
Warrant shall have been exercised, the Company shall cause its transfer agent to issue the Shares so purchased to Purchaser in
book-entry format and, unless instructed otherwise in writing by the Holders, shall be credited to the Holder’s brokerage
account through the DTC’s Deposit Withdrawal at Custodian system as indicated on the attached Exhibit A.  Any
reference in this Warrant to the issuance of a certificate or the certificates representing the Shares shall also be deemed a reference
to the book-entry issuance of such Shares. Unless this Warrant has expired, a new Warrant representing the number of Shares, if
any, with respect to which this Warrant shall not then have been exercised shall also be delivered to the Holder hereof or its
nominee within such time.

 

(b)          In
addition to any other rights available to the Holder, if the Company fails to cause the transfer agent for the Warrant Sharesto
transmit to the Holder a certificate or the certificates representing the Warrant Shares pursuant to an exercise on or before the
ten business days from the date the Company receives a completed Exercise Notice and payment of the Warrant Purchase Price, and
if after such date the Holder is required by its broker to purchase (in an open market transaction or otherwise) or the Holder’s
brokerage firm is required to purchase, shares of Common Stock to deliver in satisfaction of a sale by the Holder of the Warrant
Shares which the Holder anticipated receiving upon such exercise (a “Buy-In”), then the Company shall (A) pay
in cash or Shares, at the Company’s exclusive option, to the Holder the amount, if any, by which (x) the Holder’s
total purchase price (including brokerage commissions, if any) for the shares of Common Stock so purchased exceeds (y) the
amount obtained by multiplying (1) the number of Shares that the Company was required to deliver to the Holder in connection
with the exercise at issue times (2) the price at which the sell order giving rise to such purchase obligation was executed,
and (B) at the option of the Holder, either reinstate the portion of the Warrant and equivalent number of Warrant for which
such exercise was not honored (in which case such exercise shall be deemed rescinded) or deliver to the Holder the number of shares
of Common Stock that would have been issued had the Company timely complied with its exercise and delivery obligations hereunder.
For example, if the Holder purchases Common Stock having a total purchase price of $11,000 to cover a Buy-In with respect to an
attempted exercise of shares of Common Stock with an aggregate sale price giving rise to such purchase obligation of $10,000, under
clause (A) of the immediately preceding sentence the Company shall be required to pay the Holder $1,000 in cash or shares
of Common Stock, at the exclusive option of the Company.  The Holder shall provide the Company written notice indicating
the amounts payable to the Holder in respect of the Buy-In and, upon request of the Company, evidence of the amount of such loss.

 

    	 

    	 

    
 

5.          AUTHORIZATION
OF SHARES. The Company represents and warrants that this Warrant has been duly authorized by all necessary corporate action, has
been duly executed and delivered and is a legal and binding obligation of the Company, enforceable against the Company in accordance
with the terms of this Warrant, except to the extent such enforceability may be limited by applicable bankruptcy, insolvency, reorganization,
moratorium or similar laws affecting creditors' and contracting parties' rights generally. The Company covenants and agrees that
all Shares which may be issued upon the exercise of the rights represented by this Warrant according to the terms hereof or represented
by the Common Stock will, upon issuance and payment therefor, be duly authorized and issued, fully paid and nonassessable. The
Company further covenants and agrees that during the period within which the rights represented by this Warrant may be exercised,
the Company will at all times have authorized, and reserved for the purpose of issue or transfer upon exercise of the subscription
rights evidenced by this Warrant, a sufficient number of shares of its Common Stock to provide for the exercise of the rights represented
by this Warrant, free from preemptive rights, rights of first refusal or other contingent purchase rights other than those held
by a holder of this Warrant (as a result of holding this Warrant).

 

6.          CHARGES,
TAXES AND EXPENSES. The Company will pay any documentary stamp taxes attributable to the issuance of Shares of Common Stock upon
the exercise of this Warrant; provided, however, that the Company shall not be required to pay any tax which may be payable in
respect of any transfer involved in the registration of any certificates for Warrants, or shares of Common Stock issued upon exercise
of this Warrant, in a name other than that of the Purchaser. The Purchaser shall be responsible for all other tax liability that
may arise as a result of holding or transferring this Warrant or receiving Shares of Common Stock upon exercise hereof.

 

7.          ADJUSTMENTS
OF WARRANT PURCHASE PRICE AND NUMBER OF SHARES; STOCK SPLITS, ETC. The above provisions are, however, subject to the following:

 

(a)          The
Warrant Purchase Price shall, from and after the date of issuance of this Warrant, be subject to adjustment from time to time as
hereinafter provided. Upon each adjustment of the Warrant Purchase Price, the holder of this Warrant shall thereafter be entitled
to purchase, at the Warrant Purchase Price resulting from such adjustment, the number of Shares obtained by multiplying the Warrant
Purchase Price in effect immediately prior to such adjustment by the number of Shares purchasable pursuant hereto immediately prior
to such adjustment and dividing the product thereof by the Warrant Purchase Price resulting from such adjustment.

 

(b)          In
case the Company shall at any time subdivide its outstanding shares of Common Stock into a greater number of shares, the Warrant
Purchase Price in effect immediately prior to such subdivision shall be proportionately reduced, and conversely, in case the outstanding
shares of Common Stock of the Company shall be combined into a smaller number of shares, the Warrant Purchase Price in effect immediately
prior to such combination shall be proportionately increased.

 

(c)          Upon
any adjustment of the Warrant Purchase Price or any adjustment of any material terms hereof, then and in each such case an officer
of the Company shall, promptly after the occurrence of any event that requires an adjustment or readjustment, give signed written
notice thereof, by first-class mail, postage prepaid, addressed to the registered holder of this Warrant at the address of such
holder as shown on the books of the Company, which notice shall state the Warrant Purchase Price resulting from such adjustment,
any material change in the terms of the Warrant, and the increase or decrease, if any, in the number of Shares purchasable at such
price upon the exercise of this Warrant, setting forth in reasonable detail the method of calculation and the facts upon which
such calculation is based.

 

    	 

    	 

    
 

8.          NO
STOCKHOLDER RIGHTS. This Warrant shall not entitle the holder hereof to any voting rights or other rights as a stockholder of the
Company.

 

9.          FUNDAMENTAL
TRANSACTION.

 

(a)          If,
at any time while this Warrant is outstanding, (i) the Company, directly or indirectly, in one or more related transactions
effects any merger or consolidation of the Company with or into another Person, (ii) the Company, directly or indirectly,
effects any sale, lease, license, assignment, transfer, conveyance or other disposition of all or substantially all of its assets
in one or a series of related transactions, (iii) any direct or indirect purchase offer, tender offer or exchange offer (whether
by the Company or another Person) is completed pursuant to which holders of Common Stock are permitted to sell, tender or exchange
their shares for other securities, cash or property and such offer has been accepted by the holders of 50% or more of the outstanding
Common Stock, (iv) the Company, directly or indirectly, in one or more related transactions effects any reclassification,
reorganization or recapitalization of the Common Stock or any compulsory share exchange pursuant to which the Common Stock is effectively
converted into or exchanged for securities other than the Company’s securities, cash or property, (v) the Company, directly
or indirectly, in one or more related transactions consummates a stock or share purchase agreement or other business combination
(including, without limitation, a reorganization, recapitalization, spin-off or scheme of arrangement) with another Person whereby
such other Person acquires more than 50% of the outstanding shares of Common Stock (not including any shares of Common Stock held
by the other Person or other Persons making or party to, or associated or affiliated with the other Persons making or party to,
such stock or share purchase agreement or other business combination) (each a “Fundamental Transaction”), then,
upon any subsequent exercise of this Warrant, the Holder shall have the right to receive, in lieu of each Share that would have
been issuable upon such exercise immediately prior to the occurrence of such Fundamental Transaction (without regard to any limitation
in Section 3 on the exercise of this Warrant), the number of shares of Common Stock of the successor or acquiring corporation
or of the Company, if it is the surviving corporation, and any additional consideration (the “Alternate Consideration”)
receivable as a result of such Fundamental Transaction by a holder of the number of shares of Common Stock for which this Warrant
is exercisable immediately prior to such Fundamental Transaction (without regard to any limitation in Section 3 on the exercise
of this Warrant).

 

(b)          For
purposes of any such exercise, the Company shall apportion the Exercise Price among the Alternate Consideration in a reasonable
manner reflecting the relative value of any different components of the Alternate Consideration.  If holders of Common Stock
are given any choice as to the securities, cash or property to be received in a Fundamental Transaction, then the Holder shall
be given the same choice as to the Alternate Consideration it receives upon any exercise of this Warrant following such Fundamental
Transaction. 

 

    	 

    	 

    
 

(c)          The
Company shall cause any successor entity in a Fundamental Transaction in which the Company is not the survivor (the “Successor
Entity”) to assume in writing all of the obligations of the Company under this Warrant and the other transaction documents
in accordance with the provisions of this Section 9 pursuant to a written agreement in customary form and substance prior
to such Fundamental Transaction and shall, at the option of the holder of this Warrant, deliver to the Holder in exchange for this
Warrant a security of the Successor Entity evidenced by a written instrument substantially similar in form and substance to this
Warrant which is exercisable, as applicable, for any Alternate Consideration and/or a corresponding number of shares of capital
stock of such Successor Entity (or its parent entity) equivalent to the shares of Common Stock issuable upon exercise of this Warrant
(without regard to any limitations on the exercise of this Warrant) prior to such Fundamental Transaction.  Upon the
occurrence of any such Fundamental Transaction, the Successor Entity shall succeed to, and be substituted for (so that from and
after the date of such Fundamental Transaction, the provisions of this Warrant and the other transaction documents referring to
the “Company” shall refer instead to the Successor Entity), and may exercise every right and power of the Company and
shall assume all of the obligations of the Company under this Warrant and the other transaction documents with the same effect
as if such Successor Entity had been named as the Company herein.  For purposes of this Warrant, “Person” means
an individual, sole proprietorship, corporation, partnership, limited partnership, limited liability company, association, joint
venture, trust, statutory trust, unincorporated organization, estate or other mutual company, joint stock company, estate, union,
employee organization, bank, trust company, land trust or other organization, whether or not a legal entity.

  

10.          TRANSFER
OF WARRANTS. Subject to compliance with any applicable securities laws, this Warrant and all rights hereunder are transferable,
in whole or in part, upon surrender of this Warrant at the principal office of the Company, together with a written assignment
of this Warrant substantially in the form attached hereto as Exhibit B, duly executed by the Holder or its agent or attorney and
funds sufficient to pay any transfer taxes payable upon the making of such transfer. Upon such surrender and, if required, such
payment, the Company shall execute and deliver a new Warrant or Warrants in the name of the assignee or assignees and in the denomination
or denominations specified in such instrument of assignment, and shall issue to the assignor a new Warrant evidencing the portion
of this Warrant not so assigned, and this Warrant shall promptly be cancelled. Any such transfer shall be immediately recorded
in the Company’s books, records and warrant register.

 

11.          SURRENDER.
This Warrant is exchangeable, upon the surrender hereof by the holder hereof at the principal office of the Company, for new Warrants
of like tenor representing in the aggregate the right to subscribe for and purchase the number of Shares which may be subscribed
for and purchased hereunder, each of such new Warrants to represent the right to subscribe for and purchase such number of shares
as shall be designated by said holder hereof at the time of such surrender.

 

12.          FRACTIONAL
SHARES. The Company will not be required upon the exercise of this Warrant to issue fractions of shares of Common Stock, but may,
at its option, either (a) purchase such fraction for an amount in cash equal to the current value of such fraction computed on
the basis of the closing market price of a share of Common Stock as quoted on the principal exchange or trading facility on which
shares of Common Stock are traded on the trading day immediately preceding the day upon which this Warrant was surrendered for
exercise in accordance with Section 1 hereof, or (b) issue the required share. By accepting this Warrant, the holder hereof expressly
waives any right to receive any fractional share upon exercise of a Warrant, except as expressly provided in this Section 12.

 

    	 

    	 

    
 

13.          REGISTERED
SECURITIES. The Common Stock underlying this Warrant have been registered with the SEC and qualified by state authorities, or an
exemption from such registration and qualification requirements is available. The Common Stock issuable upon exercise of the Warrant
may be transferred and sold in reliance on the Registration Statement. The Company will attempt to maintain the effectiveness of
a current prospectus covering the Common Stock issuable upon exercise of the Warrants until the expiration of the Warrants.

 

If, however, the Registration Statement is no longer effective (including
by reason of a post-effective amendment to the registration statement which has not yet been declared effective), then this Warrant
may only be exercised on a cashless basis pursuant to Section 2 above, in which case the Shares to be issued shall not be registered
under the Securities Act of 1933, as amended, and the rules and regulations promulgated thereunder (the “Securities Act”).
In such case, the Shares shall, if required under the Securities Act, be subject to a stop transfer order and the certificate or
certificates representing the Shares shall bear appropriate restrictive legends, unless such Shares are eligible for resale without
restriction under the Securities Act.

 

14.         GOVERNING
LAW. All questions concerning this Warrant will be governed and interpreted and enforced in accordance with the internal law, not
the law of conflicts, of the State of Delaware.

 

15.          MISCELLANEOUS.
On receipt of evidence reasonably satisfactory to the Company of the loss, theft, destruction or mutilation of this Warrant, and,
in the case of any such loss, theft, destruction or mutilation of this Warrant, on delivery of an indemnity agreement reasonably
satisfactory in form to the Company or, in the case of mutilation, on surrender and cancellation of such Warrant, the Company at
its expense will execute and deliver, in lieu thereof, a new Warrant of like tenor. If the last or appointed day for the taking
of any action or the expiration of any right required or granted herein shall be a Saturday or Sunday, or shall be a legal U.S.
or New York state holiday, then such action may be taken or such right may be exercised on the next succeeding day not a Saturday,
Sunday or holiday. The invalidity or unenforceability of any provision of this Warrant shall in no way affect the validity or enforceability
of any other provisions of this Warrant, or the Agreement.

 

16.          NOTICES.
All notices, requests, consents and other communications hereunder shall be in writing, shall be delivered (A) if within the United
States, by first-class registered or certified airmail, or nationally recognized overnight express courier, postage prepaid, or
by facsimile, or (B) if from outside the United States, by International Federal Express (or comparable service) or facsimile,
and shall be deemed given (i) if delivered by first-class registered or certified mail domestic, upon the business day received,
(ii) if delivered by nationally recognized overnight carrier, one (1) business day after timely delivery to such carrier, (iii)
if delivered by International Federal Express (or comparable service), two (2) business days after so mailed, (iv) if delivered
by facsimile, upon electric confirmation of receipt. Notices to the Company pursuant to this Warrant shall be delivered to the
address set forth on the signature page hereof, until another address is designated in writing by the Company. Notices to the holder
pursuant to this Warrant shall be delivered to the address set forth in the Company's records, until another address is designated
in writing by the holder.

 

    	 

    	 

    

 

IN WITNESS WHEREOF, the Company has caused this Warrant to be signed
by its duly authorized officer and this Warrant to be dated as of the date set forth above.

 

	Address:	NEUROMETRIX, INC.
	 	 
	 	By	 
	 	 	 
	 	Name:	 
	 	 	 
	 	Title:	 

  

    	 

    	 

    
 

EXHIBIT A

 

EXERCISE NOTICE

(To be executed upon exercise
of the Warrant(s))

 

The undersigned hereby irrevocably elects to exercise the right
to purchase shares of Common Stock of NeuroMetrix, Inc. and (check one or both):

 

	 	q	herewith tenders in payment for                                 shares of Common Stock an amount of $                                         by certified or official bank check made payable to the order of NeuroMetrix, Inc. or by wire transfer in immediately available funds to an account arranged with NeuroMetrix, Inc.; and/or

 

	 	q	herewith tenders the Warrant(s) for                                 shares of Common Stock pursuant to the cashless exercise provision of Section 2 of the Warrant.

 

Please check below if this exercise is contingent upon the consummation
of a Fundamental Transaction as provided in Section 9 of the Warrant:

 

	 	q	This exercise is being made in connection with a Fundamental Transaction; provided, that in the event the Fundamental Transaction shall not be consummated, then this exercise shall be deemed to be revoked.

  

The undersigned requests that a statement representing the shares
of Common Stock issued upon exercise of the Warrant(s) be delivered in accordance with the instructions set forth below.

  

Dated:  ____________
__, 20___

  

THIS EXERCISE NOTICE MUST BE DELIVERED TO THE COMPANY, PRIOR TO
5:00 P.M., NEW YORK CITY TIME, ON THE EXPIRATION DATE.  ALL CAPITALIZED TERMS USED HEREIN BUT NOT DEFINED HEREIN SHALL
HAVE THE MEANINGS AS SIGNED TO THEM IN THE WARRANT.

  

THE UNDERSIGNED REQUESTS THAT A STATEMENT REPRESENTING THE SHARES
OF COMMON STOCK BE DELIVERED AS FOLLOWS:

 

	Name:	 
	 	(Please Print)
	 	 
	Address:	 
	 	 
	 	 
	Telephone:	 
	 	 
	Fax:	 

  

Social Security Number or Other Taxpayer Identification Number (if
applicable): __________________________

 

    	 

    	 

    
  

IF SAID NUMBER OF SHARES SHALL NOT BE ALL THE SHARES
PURCHASABLE UNDER THE WARRANT(S), THE UNDERSIGNED REQUESTS THAT NEW WARRANT(S) REPRESENTING THE BALANCE OF SUCH WARRANT(S) SHALL
BE REISSUED TO THE HOLDER. 

  

	Signature:	 	 	 
	 	 	 
	Name:	 	 	 
	 	 	 
	Capacity in which Signing:	 	 
	 	 	 
	 	 	 

  

    	 

    	 

    
 

Exhibit B

 

ASSIGNMENT FORM

 

(To assign the foregoing Warrant, execute this
form and supply required information. Do not use this form to purchase shares.)

 

FOR VALUE RECEIVED, the foregoing Warrant and all rights evidenced
thereby are hereby assigned to:

 

	Name:	 
	 	 
	 	(Please Print)

 

	Address:	 
	 	 
	 	(Please Print)

 

Dated:

 

Holder's

 

Signature:

 

Holder's

 

Address:

 

NOTE: The signature to this Assignment Form must correspond with
the name as it appears on the face of the Warrant, without alteration or enlargement or any change whatever. Officers of corporations
and those acting in a fiduciary or other representative capacity should file proper evidence of authority to assign the foregoing
Warrant.Exhibit 10.19.2

 

DAWSON JAMES SECURITIES,
INC.

925 South Federal Highway,
Suite No. 600

Boca Raton, Florida 33432

 

January 30, 2012

 

Shai N. Gozani, MD, PhD

Chief Executive Officer

NeuroMetrix, Inc.

62 Fourth Avenue

Waltham, MA 02451

 

Re: Amendment of Engagement Letter

Dear Shai,

This letter amends the letter agreement
between NeuroMetrix, Inc. (the “Company”) and Dawson James Securities, Inc. (“DJSI”) dated
December 30, 2011 (the “Engagement Letter”) as follows:

1. Fees and Expenses.

            (a)         The
first sentence of Section 8(a) of the Engagement Letter is hereby deleted and replaced with the following:

	 	“Upon signing of this letter agreement, DJSI will be paid a due diligence fee of $25,000, which shall be reimbursable to the Company to extent it is not actually incurred.”

 

            
(b)         The second sentence of Section 8(b)(ii) of the Engagement Letter is hereby
deleted and replaced with the following: 

	 	“The warrants will have a term of five (5) years from the effective date of the Registration Statement and will be exercisable after twelve (12) months from the date of issuance.”

(b)         Section
8(c)(iii)(B) of the Engagement Letter is hereby deleted and replaced with the following:

	 	 “(B) the subject of any hedging, short sale, derivative, put, or call transaction that would result in the effective economic disposition of the securities by any person for a period of 180 days immediately following the effective date of the Registration Statement or commencement of sales of the Registered Placement, except the transfer of any security as permitted by the FINRA rules.”

 

    	 

    	 

    

 2. Warrant Purchase Agreement.

          (a)          Section
3 (“Term”) of Exhibit B to the Engagement Letter (“Form of Warrant Purchase Agreement”) is hereby deleted
and replaced with the following:

          
“3. Term. The DJSI Warrants shall expire and not be exercisable or convertible more than five years from the effective date
of the Registration Statement.

          
(b)          Section 7 of Exhibit B to the Engagement Letter (“Form of Warrant Purchase Agreement” is hereby deleted and
replaced with the following:

          
“7. Non-Transfer.  FOR A PERIOD OF SIX MONTHS AFTER THE ISSUANCE DATE OF THE DJSI WARRANTS, NEITHER THE DJSI
WARRANTS SHALL BE (A) SOLD, TRANSFERRED, ASSIGNED, PLEDGED, OR HYPOTHECATED, OR (B) THE SUBJECT OF ANY HEDGING, SHORT SALE, DERIVATE,
PUT, OR CALL TRANSACTION THAT WOULD RESULT IN THE EFFECTIVE ECONOMIC DISPOSITION OF THE SECURITIES BY ANY PERSON FOR A PERIOD OF
180 DAYS IMMEDIATELY FOLLOWING THE DATE OF THE EFFECTIVENESS OF THE REGISTRATION STATEMENT OR COMMENCEMENT OF SALES OF THE REGISTERED
PLACEMENT, EXCEPT THE TRANSFER OF ANY SECURITY AS PERMITTED BY THE FINRA RULES.”

Except as set forth above, the Engagement
Letter shall remain in full force and effect. If you agree with the above please sign below and return an executed copy of this
letter to my attention.

	 	Very truly yours,
	 	 
	 	DAWSON JAMES SECURITIES, INC.
	 	 
	 	/s/ Joseph E. Balagot
	 	Joseph E. Balagot
	 	Managing Partner

 

	AGREED AND ACCEPTED:	 
	 	 
	NeuroMetrix, Inc.	 
	 	 
	/s/ Thomas T. Higgins	 
	Thomas T. Higgins	 
	Chief Financial Officer

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