Form of Class B Warrant



 EXHIBIT 4.2 
 CLASS B COMMON STOCK PURCHASE WARRANT 
 To Purchase Shares of Common Stock of 
 DARA BIOSCIENCES, INC. 
 THIS CLASS B
COMMON STOCK PURCHASE WARRANT (the “Warrant”) certifies that, for value received, the holder (the “Holder”), is entitled, upon the terms and subject to the limitations on exercise and the conditions hereinafter set
forth, at any time on or after first day after the 12-month anniversary of the date hereof (the “Initial Exercise Date”) and on or prior to the close of business on the five year anniversary of the Initial Exercise Date (the
“Termination Date”) but not thereafter, to subscribe for and purchase from DARA BioSciences, Inc., a Delaware corporation (the “Company”), up to          shares (the
“Warrant Shares”) of Common Stock, par value $0.01 per share, of the Company (the “Common Stock”). The purchase price of one share of Common Stock under this Warrant shall be equal to the Exercise Price, as defined
in Section 2(b). 
 Section 1. Definitions. Capitalized terms used and not otherwise defined herein shall have the meanings
set forth in that certain Securities Purchase Agreement (the “Purchase Agreement”), dated                     
    , 2008, among the Company and the purchasers signatory thereto. 
 Section 2. Exercise.

 a) Exercise of Warrant. Exercise of the purchase rights represented by this Warrant may be made, in whole or in part, at any time or
times on or after the Initial Exercise Date and on or before the Termination Date by delivery to the Company of a duly executed facsimile copy of the Notice of Exercise Form annexed hereto (or such other office or agency of the Company as it may
designate by notice in writing to the registered Holder at the address of such Holder appearing on the books of the Company); provided, however, within five Trading Days of the date said Notice of Exercise is delivered to the Company, if this
Warrant is exercised in full, the Holder shall have surrendered this Warrant to the Company and the Company shall have received payment of the aggregate Exercise Price of the Warrant Shares thereby purchased by wire transfer or cashier’s check
drawn on a United States bank. Notwithstanding anything herein to the contrary, the Holder shall not be required to physically surrender this Warrant to the Company until the Holder has purchased all of the Warrant Shares available hereunder and the
Warrant has been exercised in full. Partial exercises of this Warrant resulting in purchases of a portion of the total number of Warrant Shares available hereunder shall have the effect of lowering the outstanding number of Warrant Shares
purchasable hereunder in an amount equal to the applicable number of Warrant Shares purchased. The Holder and the Company shall maintain records showing the number of Warrant Shares purchased and the date of such purchases. The Company shall deliver
any objection to any Notice of Exercise Form within two Business Days of receipt of such notice. In the event of any dispute or discrepancy, the records of the Company shall be controlling and determinative in the absence of manifest error. The
Holder and any assignee, by acceptance of this Warrant, acknowledge and agree that, by reason 








 
of the provisions of this paragraph, following the purchase of a portion of the Warrant Shares hereunder, the number of Warrant Shares available for purchase
hereunder at any given time may be less than the amount stated on the face hereof. 
 b) Exercise Price. The per share exercise price
of the Common Stock under this Warrant shall be $2.25, subject to adjustment hereunder (the “Exercise Price”). 
 c)
Cashless Exercise. If at any time during the term of this Warrant either there is no effective Registration Statement registering, or no current prospectus available for, the issuance of the Warrant Shares by the Holder, then this Warrant may
also be exercised at such time by means of a “cashless exercise” in which the Holder shall be entitled to receive a certificate for the number of Warrant 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 of such election; 

  

	 	(B)	= the Exercise Price of this Warrant, as adjusted; and 

  

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


 d) Mechanics of Exercise. 
 i. Authorization of Warrant Shares. The Company covenants that all Warrant Shares which may be issued upon the exercise of the purchase rights represented by this Warrant will, upon exercise of the purchase
rights represented by this Warrant, be duly authorized, validly issued, fully paid and nonassessable and free from all taxes, liens and charges in respect of the issue thereof (other than taxes in respect of any transfer occurring contemporaneously
with such issue). 
 ii. Delivery of Certificates Upon Exercise. Certificates for shares purchased hereunder shall be transmitted by
the transfer agent of the Company to the Holder by crediting the account of the Holder’s prime broker with the Depository Trust Company through its Deposit Withdrawal Agent Commission (“DWAC”) system if the Company is a
participant in such system, and otherwise by physical delivery to the address specified by the Holder in the Notice of Exercise within three Trading Days from the delivery to the Company of the Notice of Exercise Form, surrender of this Warrant (if
required) and payment of the aggregate Exercise Price as set forth above (“Warrant Share Delivery Date”). This Warrant shall be deemed to have been exercised on the date the Exercise Price is received by the Company. The Warrant
Shares shall be deemed to have been issued, and Holder or any other person so designated to be named therein shall be deemed to have become a holder of record of such shares for all purposes, as of the date the Warrant has been exercised by payment
to the Company of the Exercise Price. 
 iii. Delivery of New Warrants Upon Exercise. If this Warrant shall have been exercised in
part, the Company shall, at the request of a Holder and upon 

  

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surrender of this Warrant certificate, at the time of delivery of the certificate or certificates representing Warrant Shares, deliver to Holder a new
Warrant evidencing the rights of Holder to purchase the unpurchased Warrant Shares called for by this Warrant, which new Warrant shall in all other respects be identical with this Warrant. 
 iv. No Fractional Shares or Scrip. No fractional shares or scrip representing fractional shares shall be issued upon the exercise of this Warrant.
As to any fraction of a share which Holder would otherwise be entitled to purchase upon such exercise, the Company shall pay a cash adjustment in respect of such final fraction in an amount equal to such fraction multiplied by the Exercise Price.

 Section 3. Certain Adjustments. 
 a) Stock Dividends and Splits. If the Company, at any time while this Warrant is outstanding: (A) pays a stock dividend or otherwise make a distribution or distributions on shares of its Common Stock or
any other equity or equity equivalent securities payable in shares of Common Stock (which, for avoidance of doubt, shall not include any shares of Common Stock issued by the Company pursuant to this Warrant, the other Class B Warrants and the
Class A Warrants), (B) subdivides outstanding shares of Common Stock into a larger number of shares, (C) combines (including by way of reverse stock split) outstanding shares of Common Stock into a smaller number of shares, or
(D) issues by reclassification of shares of the Common Stock any shares of capital stock of the Company, then in each case the Exercise Price shall be multiplied by a fraction of which the numerator shall be the number of shares of Common Stock
(excluding treasury shares, if any) outstanding immediately before such event and of which the denominator shall be the number of shares of Common Stock outstanding immediately after such event and the number of shares issuable upon exercise of this
Warrant shall be proportionately adjusted. Any adjustment made pursuant to this Section 3(a) shall become effective immediately after the record date for the determination of stockholders entitled to receive such dividend or distribution and
shall become effective immediately after the effective date in the case of a subdivision, combination or re-classification. 
 b)
Fundamental Transaction. If, at any time while this Warrant is outstanding, (A) the Company effects any merger or consolidation of the Company with or into another Person, (B) the Company effects any sale of all or substantially all
of its assets in one or a series of related transactions, (C) any tender offer or exchange offer (whether by the Company or another Person) is completed pursuant to which holders of Common Stock are permitted to tender or exchange their shares
for other securities, cash or property, or (D) the Company effects any reclassification of the Common Stock or any compulsory share exchange pursuant to which the Common Stock is effectively converted into or exchanged for other securities,
cash or property (each “Fundamental Transaction”), then, upon any subsequent exercise of this Warrant, the Holder shall have the right to receive, for each Warrant Share that would have been issuable upon such exercise immediately
prior to the occurrence of such Fundamental Transaction, the number of shares of Common Stock of the successor or acquiring corporation or of the Company, if it is the surviving corporation, and/or any other consideration, including cash (the
“Alternate Consideration”), receivable as a result of such merger, consolidation or disposition of assets by a Holder of the number of shares of Common Stock for which this Warrant is 

  

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exercisable immediately prior to such event. For purposes of any such exercise, the determination of the Exercise Price shall be appropriately adjusted to
apply to such Alternate Consideration based on the amount of Alternate Consideration issuable in respect of one share of Common Stock in such Fundamental Transaction, and 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. To the extent necessary to effectuate the foregoing provisions, any
successor to the Company or surviving entity in such Fundamental Transaction shall issue to the Holder a new warrant consistent with the foregoing provisions and evidencing the Holder’s right to exercise such warrant into Alternate
Consideration. 
 c) Calculations. All calculations under this Section 3 shall be made to the nearest cent or the nearest 1/100th
of a share, as the case may be. For purposes of this Section 3, the number of shares of Common Stock deemed to be issued and outstanding as of a given date shall be the sum of the number of shares of Common Stock (excluding treasury shares, if
any) issued and outstanding. 
 d) Notice to Holders. Whenever the Exercise Price is adjusted pursuant to this Section 3, the
Company shall promptly mail to each Holder a notice setting forth the Exercise Price after such adjustment and setting forth a brief statement of the facts requiring such adjustment. 
 Section 4. Transfer of Warrant. 
 a) Transferability. 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 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. A Warrant, if properly assigned, may be exercised by a new holder for the purchase of Warrant Shares without having a new Warrant issued. 
 b) New Warrants. This Warrant may be divided or combined with other Warrants upon presentation hereof at the aforesaid office of the Company,
together with a written notice specifying the names and denominations in which new Warrants are to be issued, signed by the Holder or its agent or attorney. Subject to compliance with Section 4(a), as to any transfer which may be involved in
such division or combination, the Company shall execute and deliver a new Warrant or Warrants in exchange for the Warrant or Warrants to be divided or combined in accordance with such notice. 
  

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 c) Warrant Register. The Company shall register this Warrant, upon records to be maintained by the
Company for that purpose (the “Warrant Register”), in the name of the record Holder hereof from time to time. The Company may deem and treat the registered Holder of this Warrant as the absolute owner hereof for the purpose of any
exercise hereof or any distribution to the Holder, and for all other purposes, absent actual notice to the contrary. 
 Section 5.
Miscellaneous. 
 a) Title to Warrant. Prior to the Termination Date and subject to compliance with applicable laws and
Section 4 of this Warrant, this Warrant and all rights hereunder are transferable, in whole or in part, at the office or agency of the Company by the Holder in person or by duly authorized attorney, upon surrender of this Warrant together with
the Assignment Form annexed hereto properly endorsed. 
 b) No Rights as Stockholder Until Exercise. This Warrant does not entitle the
Holder to any voting rights or other rights as a stockholder of the Company prior to the exercise hereof. Upon the surrender of this Warrant and the payment of the aggregate Exercise Price (or by means of a cashless exercise), the Warrant Shares so
purchased shall be and be deemed to be issued to such Holder as the record owner of such shares as of the close of business on the later of the date of such surrender or payment. 
 c) Loss, Theft, Destruction or Mutilation of Warrant. The Company covenants that upon receipt by the Company of evidence reasonably satisfactory
to it of the loss, theft, destruction or mutilation of this Warrant or any stock certificate relating to the Warrant Shares, and in case of loss, theft or destruction, of indemnity or security reasonably satisfactory to it (which, in the case of the
Warrant, shall not include the posting of any bond), and upon surrender and cancellation of such Warrant or stock certificate, if mutilated, the Company will make and deliver a new Warrant or stock certificate of like tenor and dated as of such
cancellation, in lieu of such Warrant or stock certificate. 
 d) Saturdays, Sundays, Holidays, etc. 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, Sunday or a legal holiday, then such action may be taken or such right may be exercised on the next succeeding day not a Saturday, Sunday or
legal holiday. 
 e) Authorized Shares. 
 The Company covenants that during the period the Warrant is outstanding, it will reserve from its authorized and unissued Common Stock a sufficient number of shares to provide for the issuance of the Warrant Shares
upon the exercise of any purchase rights under this Warrant. The Company further covenants that its issuance of this Warrant shall constitute full authority to its officers who are charged with the duty of executing stock certificates to execute and
issue the necessary certificates for the Warrant Shares upon the exercise of the purchase rights under this Warrant. The Company will take all such reasonable action as may be necessary to assure that such Warrant Shares may be issued as provided
herein without violation of any applicable law or regulation, or of any requirements of the Trading Market upon which the Common Stock may be listed. 
  

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 Except and to the extent as waived or consented to by the Holder, the Company shall not by any action,
including, without limitation, amending its certificate of incorporation or through any reorganization, transfer of assets, consolidation, merger, dissolution, issue or sale of securities or any other voluntary action, avoid or seek to avoid the
observance or performance of any of the terms of this Warrant, but will at all times in good faith assist in the carrying out of all such terms and in the taking of all such actions as may be necessary or appropriate to protect the rights of Holder
as set forth in this Warrant against impairment. Without limiting the generality of the foregoing, the Company will (a) not increase the par value of any Warrant Shares above the amount payable therefor upon such exercise immediately prior to
such increase in par value, (b) take all such action as may be necessary or appropriate in order that the Company may validly and legally issue fully paid and nonassessable Warrant Shares upon the exercise of this Warrant, and (c) use
commercially reasonable efforts to obtain all such authorizations, exemptions or consents from any public regulatory body having jurisdiction thereof as may be necessary to enable the Company to perform its obligations under this Warrant.

 Before taking any action which would result in an adjustment in the number of Warrant Shares for which this Warrant is exercisable or in
the Exercise Price, the Company shall obtain all such authorizations or exemptions thereof, or consents thereto, as may be necessary from any public regulatory body or bodies having jurisdiction thereof. 
 f) Jurisdiction. All questions concerning the construction, validity, enforcement and interpretation of this Warrant shall be determined in
accordance with the provisions of the Purchase Agreement. 
 g) Restrictions. The Holder acknowledges that the Warrant Shares acquired
upon the exercise of this Warrant, if not registered, will have restrictions upon resale imposed by state and federal securities laws. 
 h)
Nonwaiver and Expenses. No course of dealing or any delay or failure to exercise any right hereunder on the part of Holder shall operate as a waiver of such right or otherwise prejudice Holder’s rights, powers or remedies,
notwithstanding the fact that all rights hereunder terminate on the Termination Date. If the Company willfully and knowingly fails to comply with any provision of this Warrant, which results in any material damages to the Holder, the Company shall
pay to Holder such amounts as shall be sufficient to cover any costs and expenses including, but not limited to, reasonable attorneys’ fees, including those of appellate proceedings, incurred by Holder in collecting any amounts due pursuant
hereto or in otherwise enforcing any of its rights, powers or remedies hereunder. 
 i) Notices. Any notice, request or other document
required or permitted to be given or delivered to the Holder by the Company shall be delivered in accordance with the notice provisions of the Purchase Agreement. 
 j) Limitation of Liability. No provision hereof, in the absence of any affirmative action by Holder to exercise this Warrant or purchase Warrant Shares, and no enumeration herein of the rights or privileges of
Holder, shall give rise to any liability of Holder for the purchase price of any Common Stock or as a stockholder of the Company, whether such liability is asserted by the Company or by creditors of the Company. 
  

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 k) Remedies. Holder, in addition to being entitled to exercise all rights granted by law,
including recovery of damages, will be entitled to specific performance of its rights under this Warrant. The Company agrees that monetary damages would not be adequate compensation for any loss incurred by reason of a breach by it of the provisions
of this Warrant and hereby agrees to waive the defense in any action for specific performance that a remedy at law would be adequate. 
 l)
Successors and Assigns. Subject to applicable securities laws, this Warrant and the rights and obligations evidenced hereby shall inure to the benefit of and be binding upon the successors of the Company and the successors and permitted
assigns of Holder. The provisions of this Warrant are intended to be for the benefit of all Holders from time to time of this Warrant and shall be enforceable by any such Holder or holder of Warrant Shares. 
 m) Amendment. This Warrant may be modified or amended or the provisions hereof waived with the written consent of the Company and the Holder.

 n) Severability. Wherever possible, each provision of this Warrant shall be interpreted in such manner as to be effective and valid
under applicable law, but if any provision of this Warrant shall be prohibited by or invalid under applicable law, such provision shall be ineffective to the extent of such prohibition or invalidity, without invalidating the remainder of such
provisions or the remaining provisions of this Warrant. 
 o) Headings. The headings used in this Warrant are for the convenience of
reference only and shall not, for any purpose, be deemed a part of this Warrant. 
 ******************** 
  

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 IN WITNESS WHEREOF, the Company has caused this Warrant to be executed by its officer thereunto duly
authorized. 
 Dated:                 
    , 2008 
  

			
	DARA BIOSCIENCES, INC.
		
	By:	 	  

	Name:	 	
	Title:	 	


  

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 NOTICE OF EXERCISE 
  

	TO:	DARA BioSciences, Inc. 

 8601 Six Forks Road, Suite 160

 Raleigh, North Carolina 27615 
 (1) The undersigned hereby elects to purchase              Warrant Shares of the Company pursuant to the terms of the attached Warrant, and tenders herewith payment of the
exercise price, together with all applicable transfer taxes, if any, in accordance with paragraph (2) below. 
 (2) Payment shall take
the form of (check applicable box): 
  

	 	 ̈	$                     in lawful money of the United States; or


  

	 	 ̈	the cancellation of such number of Warrant Shares as is necessary, in accordance with the formula set forth in subsection 2(c), to exercise this Warrant with respect to the maximum
number of Warrant Shares purchasable pursuant to the cashless exercise procedure set forth in subsection 2(c). 

 (3) Please
issue a certificate or certificates representing said Warrant Shares in the name of the undersigned or in such other name as is specified below: 
  
  
 The Warrant Shares shall be delivered to the
following: 
  
  
  
  
  
  
  

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 ASSIGNMENT FORM 
 (To assign the foregoing warrant, execute this form and supply required information. Do not use this form to exercise the warrant.) 
 FOR VALUE RECEIVED, the foregoing Warrant and all rights evidenced thereby are hereby assigned to
                                         
                        whose address is
                                         
                                         
                                  . 
  

					
		 	Dated:	 	                        ,
            
			
		 	 Holder’s Signature:
	 	  

			
		 	 Holder’s Address:  
	 	  


 Signature Guaranteed:
                                         
                        
 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 whatsoever, and must be guaranteed by a bank or trust company. Officers of corporations and
those acting in a fiduciary or other representative capacity should file proper evidence of authority to assign the foregoing Warrant. 
  

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