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Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
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<SEC-DOCUMENT>0001140361-08-027707.txt : 20081212
<SEC-HEADER>0001140361-08-027707.hdr.sgml : 20081212
<ACCEPTANCE-DATETIME>20081212145809
ACCESSION NUMBER:		0001140361-08-027707
CONFORMED SUBMISSION TYPE:	3
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20080229
FILED AS OF DATE:		20081212
DATE AS OF CHANGE:		20081212

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			REGENERX BIOPHARMACEUTICALS INC
		CENTRAL INDEX KEY:			0000707511
		STANDARD INDUSTRIAL CLASSIFICATION:	PHARMACEUTICAL PREPARATIONS [2834]
		IRS NUMBER:				521253406
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		3 BETHESDA METRO CENTER
		STREET 2:		SUITE 700
		CITY:			BETHESDA
		STATE:			MD
		ZIP:			20814
		BUSINESS PHONE:		3019611992

	MAIL ADDRESS:	
		STREET 1:		3 BETHESDA METRO CENTER
		STREET 2:		SUITE 700
		CITY:			BETHESDA
		STATE:			MD
		ZIP:			20814

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	ALPHA 1 BIOMEDICALS INC
		DATE OF NAME CHANGE:	19950719

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Inverlochy Consultadoria & Servicos L.D.A.
		CENTRAL INDEX KEY:			0001384386
		STATE OF INCORPORATION:			S1
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		3
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-15070
		FILM NUMBER:		081246396

	BUSINESS ADDRESS:	
		STREET 1:		18 AVENUE DE LA PORTE NEUVE
		CITY:			LUXEMBOURG
		STATE:			N4
		ZIP:			L-227
		BUSINESS PHONE:		650-470-4500

	MAIL ADDRESS:	
		STREET 1:		18 AVENUE DE LA PORTE NEUVE
		CITY:			LUXEMBOURG
		STATE:			N4
		ZIP:			L-227
</SEC-HEADER>
<DOCUMENT>
<TYPE>3
<SEQUENCE>1
<FILENAME>doc1.xml
<DESCRIPTION>FORM 3
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0203</schemaVersion>

    <documentType>3</documentType>

    <periodOfReport>2008-02-29</periodOfReport>

    <noSecuritiesOwned>0</noSecuritiesOwned>

    <issuer>
        <issuerCik>0000707511</issuerCik>
        <issuerName>REGENERX BIOPHARMACEUTICALS INC</issuerName>
        <issuerTradingSymbol>RGN</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001384386</rptOwnerCik>
            <rptOwnerName>Inverlochy Consultadoria &amp; Servicos L.D.A.</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>AVENIDA ARRIAGA N 77 EDIF. MARINA, FORUM</rptOwnerStreet1>
            <rptOwnerStreet2>6 ANDAR SALA FUNCHAL</rptOwnerStreet2>
            <rptOwnerCity>MADEIRA</rptOwnerCity>
            <rptOwnerState>S1</rptOwnerState>
            <rptOwnerZipCode>10209</rptOwnerZipCode>
            <rptOwnerStateDescription>PORTUGAL</rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle></officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>4740082</value>
                    <footnoteId id="F1"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
    </nonDerivativeTable>

    <derivativeTable>
        <derivativeHolding>
            <securityTitle>
                <value>Common Stock Warrant (right to buy)</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>4.06</value>
            </conversionOrExercisePrice>
            <exerciseDate>
                <value>2006-09-15</value>
            </exerciseDate>
            <expirationDate>
                <value>2011-03-15</value>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>22601</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </derivativeHolding>
        <derivativeHolding>
            <securityTitle>
                <value>Common Stock Warrant (right to buy)</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>2.75</value>
            </conversionOrExercisePrice>
            <exerciseDate>
                <value>2006-12-21</value>
            </exerciseDate>
            <expirationDate>
                <value>2011-12-21</value>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>333333</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </derivativeHolding>
        <derivativeHolding>
            <securityTitle>
                <value>Common Stock Warrant (right to buy)</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>1.60</value>
            </conversionOrExercisePrice>
            <exerciseDate>
                <value>2008-02-29</value>
            </exerciseDate>
            <expirationDate>
                <value>2010-12-31</value>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>500000</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </derivativeHolding>
        <derivativeHolding>
            <securityTitle>
                <value>Common Stock Warrant (right to buy)</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>1.74</value>
            </conversionOrExercisePrice>
            <exerciseDate>
                <value>2008-12-10</value>
            </exerciseDate>
            <expirationDate>
                <value>2011-12-31</value>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>372552</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </derivativeHolding>
    </derivativeTable>

    <footnotes>
        <footnote id="F1">2,500,000 of these shares were acquired on Feb. 29, 2008 pursuant to a purchase agreement with the Issuer that provides that the Issuer shall have the right to repurchase the shares at any time until Dec. 31, 2009, for $2.00 per share, or at any time between Jan. 1, 2010 and Dec. 31, 2010, for $2.50 per share.  Furthermore, the purchase agreement provides that the Issuer, rather than the Reporting Person, has all voting rights in respect to the shares through Dec. 31, 2010, and that the Reporting Person may not transfer the shares through Dec. 31, 2010 except for transfers to Affiliates (as defined therein).  1,034,482 of these shares were acquired on Dec. 10, 2008 pursuant to a purchase agreement with the Issuer that provides that the Issuer, rather than the Reporting Person, has all voting rights in respect of the shares through Dec. 31, 2011, and that the Reporting Person may not transfer the shares through Dec. 31, 2011, except for transfers to Affiliates (as defined therein).</
footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>/s/ Nicola Wullschleger, Attorney-in-fact</signatureName>
        <signatureDate>2008-12-12</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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