<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0202</schemaVersion>

    <documentType>3/A</documentType>

    <periodOfReport>2005-02-20</periodOfReport>

    <dateOfOriginalSubmission>2005-03-02</dateOfOriginalSubmission>

    <noSecuritiesOwned>0</noSecuritiesOwned>

    <issuer>
        <issuerCik>0001168061</issuerCik>
        <issuerName>EON LABS INC</issuerName>
        <issuerTradingSymbol>ELAB</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001114448</rptOwnerCik>
            <rptOwnerName>NOVARTIS AG</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>LICHSTRASSE 35</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>BASEL SWITZERLAND</rptOwnerCity>
            <rptOwnerState>V8</rptOwnerState>
            <rptOwnerZipCode>CH 4056</rptOwnerZipCode>
            <rptOwnerStateDescription>SWITZERLAND</rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001031007</rptOwnerCik>
            <rptOwnerName>NOVARTIS CORP</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>608 FIFTH AVENUE</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>NEW YORK</rptOwnerCity>
            <rptOwnerState>NY</rptOwnerState>
            <rptOwnerZipCode>10020</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Common Stock, par value $0.01 per share</value>
                <footnoteId id="F1"/>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>60132122</value>
                    <footnoteId id="F2"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                    <footnoteId id="F2"/>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>See Footnote 1</value>
                    <footnoteId id="F2"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">This Form 3/A amends Table 6 of the Form 3 filed jointly by Novartis AG, Novartis Corporation and Zodnas Acquisition Corp. on
March 2, 2005. Although Exhibits 99.1 and 99.2 correctly explained that the Form 3 was jointly filed and provided all
required information on the filing persons, the original Form 3 incorrectly indicated in Table 6 that the Form 3 was being
filed by one reporting person.</footnote>
        <footnote id="F2">See Exhibit 99.1</footnote>
    </footnotes>

    <remarks>Exhibit List:

Exhibit 99.1
Exhibit 99.2</remarks>

    <ownerSignature>
        <signatureName>/s/ Peter Rupprecht, Authorized Signatory</signatureName>
        <signatureDate>2005-03-08</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>/s/ Joerg Walther, Authorized Signatory</signatureName>
        <signatureDate>2005-03-08</signatureDate>
    </ownerSignature>
</ownershipDocument>
