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Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
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 TWSM7vrzLADbmYQaionwg5sDW3P6oaM5D3tdezXMm7z1T+B+twIDAQAB
MIC-Info: RSA-MD5,RSA,
 Kh87JClBW82BtRvG66apPYDVkb2oyrQpuEmro5kxB/179LLPeYkdcjLBqYA7ffh2
 sj+T5+ektoptjxl77x9VNw==

<SEC-DOCUMENT>0001209191-03-026164.txt : 20031021
<SEC-HEADER>0001209191-03-026164.hdr.sgml : 20031021
<ACCEPTANCE-DATETIME>20031021111430
ACCESSION NUMBER:		0001209191-03-026164
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20031020
FILED AS OF DATE:		20031021

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			BEDROSIAN ARTHUR P
		CENTRAL INDEX KEY:			0001256670

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-31298
		FILM NUMBER:		03949105

	MAIL ADDRESS:	
		STREET 1:		P O BOX D 1400
		CITY:			POMONA
		STATE:			NY
		ZIP:			10970

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			LANNETT CO INC
		CENTRAL INDEX KEY:			0000057725
		STANDARD INDUSTRIAL CLASSIFICATION:	PHARMACEUTICAL PREPARATIONS [2834]
		IRS NUMBER:				230787699
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			0630

	BUSINESS ADDRESS:	
		STREET 1:		9000 STATE RD
		CITY:			PHILADELPHIA
		STATE:			PA
		ZIP:			19136
		BUSINESS PHONE:		2153339000

	MAIL ADDRESS:	
		STREET 1:		9000 STATE ROAD
		STREET 2:		9000 STATE ROAD
		CITY:			PHLADELPHIA
		STATE:			PA
		ZIP:			19136

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	NETHERLANDS SECURITIES INC
		DATE OF NAME CHANGE:	19660629
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>doc4.xml
<DESCRIPTION>FORM 4 SUBMISSION
<TEXT>
<XML>
<?xml version="1.0"?><ownershipDocument><schemaVersion>X0201</schemaVersion>    <documentType>4</documentType><periodOfReport>2003-10-20</periodOfReport><notSubjectToSection16>0</notSubjectToSection16><issuer><issuerCik>0000057725</issuerCik><issuerName>LANNETT CO INC</issuerName>        <issuerTradingSymbol>LCI</issuerTradingSymbol></issuer><reportingOwner><reportingOwnerId><rptOwnerCik>0001256670</rptOwnerCik><rptOwnerName>BEDROSIAN ARTHUR P</rptOwnerName></reportingOwnerId><reportingOwnerAddress><rptOwnerStreet1>PO BOX D 1400</rptOwnerStreet1><rptOwnerStreet2></rptOwnerStreet2><rptOwnerCity>POMONA</rptOwnerCity><rptOwnerState>NY</rptOwnerState><rptOwnerZipCode>10970</rptOwnerZipCode><rptOwnerStateDescription></rptOwnerStateDescription></reportingOwnerAddress><reportingOwnerRelationship><isDirector>0</isDirector><isOfficer>1</isOfficer><isTenPercentOwner>0</isTenPercentOwner><isOther>0</isOther><officerTitle>President</officerTitle></reportingOwnerRelationship></reportingOwner><nonDerivativeTable><nonDeriv
ativeTransaction><securityTitle><value>Common Stock</value></securityTitle><transactionDate><value>2003-10-20</value></transactionDate><deemedExecutionDate></deemedExecutionDate><transactionCoding><transactionFormType>4</transactionFormType><transactionCode>P</transactionCode><equitySwapInvolved>0</equitySwapInvolved></transactionCoding><transactionTimeliness><value></value></transactionTimeliness><transactionAmounts><transactionShares><value>3000</value></transactionShares><transactionPricePerShare><value>17</value></transactionPricePerShare><transactionAcquiredDisposedCode><value>A</value></transactionAcquiredDisposedCode></transactionAmounts><postTransactionAmounts><sharesOwnedFollowingTransaction><value>500360</value></sharesOwnedFollowingTransaction></postTransactionAmounts><ownershipNature><directOrIndirectOwnership><value>I</value><footnoteId id="F1" /></directOrIndirectOwnership><natureOfOwnership><value>By spouse</value></natureOfOwnership></ownershipNature></nonDerivativeTransaction></nonDerivative
Table><footnotes><footnote id="F1">Arthur Bedrosian disclaims beneficial ownership of these shares.  Arthur Bedrosian has commented that disclaimers of beneficial ownership on previous transactions have not been included on transaction summaries in the media.</footnote></footnotes><remarks></remarks><ownerSignature><signatureName>Arthur Bedrosian</signatureName><signatureDate>2003-10-21</signatureDate></ownerSignature></ownershipDocument>

</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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