-----BEGIN PRIVACY-ENHANCED MESSAGE-----
Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
Originator-Key-Asymmetric:
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 TWSM7vrzLADbmYQaionwg5sDW3P6oaM5D3tdezXMm7z1T+B+twIDAQAB
MIC-Info: RSA-MD5,RSA,
 HaWMb/9rkyiCa3vYb+9yZSgoKNdiI843UyasWwQCp/vuH09u/weos/t98El4HWpb
 C+CpUgbYwrHogkeoH4x2ZQ==

<SEC-DOCUMENT>0001240679-09-000007.txt : 20090513
<SEC-HEADER>0001240679-09-000007.hdr.sgml : 20090513
<ACCEPTANCE-DATETIME>20090513153132
ACCESSION NUMBER:		0001240679-09-000007
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20090511
FILED AS OF DATE:		20090513
DATE AS OF CHANGE:		20090513

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			THISTLE WILLIAM R
		CENTRAL INDEX KEY:			0001250732

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-13738
		FILM NUMBER:		09822176

	MAIL ADDRESS:	
		STREET 1:		C/O PAYCHEMEDICS CORP
		STREET 2:		1280 MASSACHUSETTS AVE STE 200
		CITY:			CAMBRIDGE
		STATE:			MA
		ZIP:			02138

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			PSYCHEMEDICS CORP
		CENTRAL INDEX KEY:			0000806517
		STANDARD INDUSTRIAL CLASSIFICATION:	SERVICES-MEDICAL LABORATORIES [8071]
		IRS NUMBER:				581701987
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		125 NAGOG PARK
		CITY:			ACTON
		STATE:			MA
		ZIP:			01720
		BUSINESS PHONE:		978-206-8220

	MAIL ADDRESS:	
		STREET 1:		125 NAGOG PARK
		CITY:			ACTON
		STATE:			MA
		ZIP:			01720
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>edgar.xml
<DESCRIPTION>PRIMARY DOCUMENT
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0303</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2009-05-11</periodOfReport>

    <issuer>
        <issuerCik>0000806517</issuerCik>
        <issuerName>PSYCHEMEDICS CORP</issuerName>
        <issuerTradingSymbol>PMD</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001250732</rptOwnerCik>
            <rptOwnerName>THISTLE WILLIAM R</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O PSYCHEMEDICS CORPORATION</rptOwnerStreet1>
            <rptOwnerStreet2>125 NAGOG PARK</rptOwnerStreet2>
            <rptOwnerCity>ACTON</rptOwnerCity>
            <rptOwnerState>MA</rptOwnerState>
            <rptOwnerZipCode>01720</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>Sr. VP and Gen. Counsel</officerTitle>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock, $.005 Par Value</value>
            </securityTitle>
            <transactionDate>
                <value>2009-05-11</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>F</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>865</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>6.41</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>8866</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value></value>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <footnotes></footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>Patrick J. Kinney, Jr. as attorney-in-fact for William R. Thistle</signatureName>
        <signatureDate>2009-05-13</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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