<SUBMISSION>
<ACCESSION-NUMBER>0001235802-07-000039
<TYPE>4
<PUBLIC-DOCUMENT-COUNT>1
<PERIOD>20070219
<FILING-DATE>20070221
<DATE-OF-FILING-DATE-CHANGE>20070221
<ISSUER>
<COMPANY-DATA>
<CONFORMED-NAME>BIOSANTE PHARMACEUTICALS INC
<CIK>0001023024
<ASSIGNED-SIC>2836
<IRS-NUMBER>582301143
<STATE-OF-INCORPORATION>DE
<FISCAL-YEAR-END>1231
</COMPANY-DATA>
<BUSINESS-ADDRESS>
<STREET1>111 BARCLAY BLVD STE 280
<CITY>LINCOLNSHIRE
<STATE>IL
<ZIP>60069
<PHONE>8474780500
</BUSINESS-ADDRESS>
<MAIL-ADDRESS>
<STREET1>111 BARCLAY BLVD STE 280
<CITY>LINCOLNSHIRE
<STATE>IL
<ZIP>60069
</MAIL-ADDRESS>
<FORMER-COMPANY>
<FORMER-CONFORMED-NAME>BEN ABRAHAM TECHNOLOGIES INC
<DATE-CHANGED>19991027
</FORMER-COMPANY>
</ISSUER>
<REPORTING-OWNER>
<OWNER-DATA>
<CONFORMED-NAME>DONENBERG PHILIP B
<CIK>0001238120
</OWNER-DATA>
<FILING-VALUES>
<FORM-TYPE>4
<ACT>34
<FILE-NUMBER>001-31812
<FILM-NUMBER>07639259
</FILING-VALUES>
<BUSINESS-ADDRESS>
<PHONE>8470500
</BUSINESS-ADDRESS>
<MAIL-ADDRESS>
<STREET1>111 BARCLAY BLVD
<STREET2>SUITE 280
<CITY>LINCOLNSHIRE
<STATE>IL
<ZIP>60069
</MAIL-ADDRESS>
</REPORTING-OWNER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>primary_doc.xml
<DESCRIPTION>PRIMARY DOCUMENT
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0202</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2007-02-19</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0001023024</issuerCik>
        <issuerName>BIOSANTE PHARMACEUTICALS INC</issuerName>
        <issuerTradingSymbol>BSP</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001238120</rptOwnerCik>
            <rptOwnerName>DONENBERG PHILIP B</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>111 BARCLAY BLVD</rptOwnerStreet1>
            <rptOwnerStreet2>SUITE 280</rptOwnerStreet2>
            <rptOwnerCity>LINCOLNSHIRE</rptOwnerCity>
            <rptOwnerState>IL</rptOwnerState>
            <rptOwnerZipCode>60069</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>CFO, Treasurer and Secretary</officerTitle>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>35822</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
    </nonDerivativeTable>

    <derivativeTable>
        <derivativeTransaction>
            <securityTitle>
                <value>Employee Stock Option (right to buy)</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>3.715</value>
            </conversionOrExercisePrice>
            <transactionDate>
                <value>2007-02-19</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>20000</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <exerciseDate>
                <value>2007-02-19</value>
            </exerciseDate>
            <expirationDate>
                <value>2015-07-18</value>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>20000</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>20000</value>
                    <footnoteId id="F1"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </derivativeTransaction>
    </derivativeTable>

    <footnotes>
        <footnote id="F1">On July 19, 2005, the reporting person was granted an option to purchase 25,000 shares of common stock.  The option vests based on BioSante's satisfaction of certain performance criteria.  As of February 19, 2007, a portion of the performance criteria was met, resulting in the vesting of 20,000 shares.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>/s/ Phillip B. Donenberg</signatureName>
        <signatureDate>2007-02-20</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SUBMISSION>
