Quick answer

Yes—but not simply because an initial screening test is positive.

For a private-sector employee, illegal-drug use may amount to serious misconduct and can be a just cause for termination under Article 297 of the Labor Code. Section 36(d) of the Comprehensive Dangerous Drugs Act also provides that an employee confirmed positive may be dealt with administratively, including possible suspension or termination.

A lawful dismissal normally requires all of the following:

Testing by a government forensic laboratory or a drug-testing laboratory accredited and monitored by the Department of Health;
A positive screening test followed by a positive confirmatory test;
Reliable proof linking the properly handled specimen and result to the employee;
Application of the employer’s valid drug-free workplace policy, work rules, and any applicable collective bargaining agreement;
Consideration of assessment, treatment, or rehabilitation where appropriate under DOLE’s drug-free workplace guidelines; and
Procedural due process: a detailed first notice, a meaningful opportunity to answer, and a written notice of the employer’s decision.

A positive screening result alone is not enough. Neither is an unverified result from an unauthorized clinic. Whether dismissal is valid ultimately depends on the test’s reliability, the company policy, the employee’s explanation, the nature of the work, prior intervention or rehabilitation, and compliance with due process.

What Philippine law says

Random workplace testing is allowed

Section 36(d) of Republic Act No. 9165, the Comprehensive Dangerous Drugs Act of 2002, provides for random drug testing of officers and employees of public and private offices under the employer’s work rules and regulations. The employer bears the cost of this workplace test.

For the private sector, DOLE Department Order No. 53-03 supplies the principal drug-free workplace guidelines. It covers private establishments, including contractors and concessionaires. Establishments with at least 10 workers must formulate and implement a drug-abuse prevention and control program; smaller establishments are encouraged to do the same.

The workplace policy should be prepared with labor participation, communicated to employees, and integrated into the establishment’s occupational safety and health program. In an organized workplace, the collective bargaining agreement may also contain controlling provisions.

Apart from random testing, a properly written policy may address testing for cause and testing following a workplace accident or near miss. The legality of a particular test may still depend on whether the employer followed its announced policy and protected the employee’s rights.

A screening result must be confirmed

Republic Act No. 9165 requires two testing methods:

A screening test, which produces an initial result; and
A confirmatory test, which confirms a positive screening result.

Testing must be performed by a government forensic laboratory or a laboratory accredited and monitored by the DOH. An ordinary clinic result is not automatically sufficient merely because the employer selected the clinic.

In Nacague v. Sulpicio Lines, Inc., the Supreme Court found an employee’s dismissal illegal because the employer failed to prove that the testing clinic was accredited and relied only on a screening test without the required confirmatory test. The Court emphasized that both methods help ensure that the result is trustworthy.

The employee’s later independent negative test does not automatically defeat an earlier result, particularly if it was taken days later. But it may support a challenge when combined with defects such as lack of laboratory accreditation, an absent confirmatory test, questionable specimen handling, or failure to consider medication that might affect the result.

Is a confirmed positive result automatically grounds for dismissal?

No. A confirmed result permits administrative action, but the law does not dispense with an individualized inquiry.

DOLE Department Order No. 53-03 contemplates an assessment mechanism. The employer’s assessment team should evaluate a confirmed positive result and determine the appropriate level of care and administrative intervention. Referral to a DOH-accredited treatment or rehabilitation facility may be appropriate for an employee diagnosed with drug dependence for the first time, an employee who voluntarily seeks assistance, or one who would benefit from treatment or rehabilitation.

Repeated drug use after an adequate opportunity for treatment and rehabilitation can support dismissal. Immediate dismissal may also be legally defensible where the proven drug use constitutes serious misconduct under the Labor Code and applicable company rules—especially when the circumstances and the safety-sensitive nature of the employee’s work make continued employment seriously incompatible with workplace safety.

In Villarico v. D.M. Consunji, Inc., the Supreme Court sustained dismissal where the employee’s illegal-drug use was established by screening and confirmatory testing, was not effectively disputed, and violated a company rule punishable by dismissal. The Court treated illegal-drug use as serious misconduct under Article 297.

The result may be different where:

Only a screening test was performed;
The laboratory’s accreditation is not established;
The specimen or chain of custody is doubtful;
The employee was not informed of the result;
A valid prescription or another medical explanation was ignored;
The company had no applicable or properly communicated rule;
The policy promised assessment or progressive intervention that the employer disregarded;
The employer applied the policy selectively or discriminatorily; or
The evidence does not substantially prove the charged misconduct.

Employers bear the burden of proving that a dismissal rests on a valid cause.

Treatment and rehabilitation considerations

A positive drug test and a clinical diagnosis of drug dependence are not necessarily the same thing. The assessment team and qualified health professionals should determine whether the employee needs treatment or rehabilitation and whether returning to the same position would pose a serious danger to co-workers or the workplace.

Under the DOLE guidelines, treatment or rehabilitation is generally undertaken at a DOH-accredited facility. The cost is ordinarily charged to the employee, while the period of treatment or rehabilitation may be treated as authorized leave chargeable against available leave credits. The precise arrangement can be more favorable under company policy, a collective bargaining agreement, or an employment benefit plan.

Successful completion of rehabilitation does not guarantee reinstatement to every position. The assessment, medical clearance, workplace risks, and applicable rules remain relevant. Conversely, an employer should not automatically equate a first confirmed result with permanent incapacity or dismiss the employee without considering the intervention provided by its own policy.

The employer must observe procedural due process

When termination is based on serious misconduct or another just cause, the employer must generally follow the twin-notice procedure under the Labor Code and DOLE Department Order No. 147-15.

First notice: the charge

The first written notice should state:

The specific act or omission charged;
The test and confirmatory result being relied upon;
The material facts surrounding the alleged violation;
The company rule allegedly violated; and
The Labor Code ground that may justify dismissal.

A vague statement that the employee “failed the drug test” may not provide enough information to prepare a meaningful defense.

The employee should ordinarily receive at least five calendar days from receipt of the notice to study the charge, consult a lawyer or union officer, collect evidence, and submit an explanation.

Meaningful opportunity to be heard

The employee must have a genuine opportunity to answer the charge and present evidence. This may be through a written explanation, conference, or hearing.

A formal hearing becomes particularly important when the employee requests one in writing, substantial factual disputes exist, company rules require it, or comparable circumstances make one necessary. The employee may seek assistance from a lawyer, union representative, or another representative.

Second notice: the decision

After considering the employee’s explanation and evidence, the employer must issue a written decision stating that grounds for termination have been established.

The decision should not be predetermined. Terminating the employee immediately upon receiving an initial result and issuing notices only afterward is a serious procedural defect.

If a valid just cause is proven but the employer fails to observe procedural due process, the dismissal may remain effective, but the employer can be ordered to pay nominal damages. In Villarico, the Supreme Court applied the established ₱30,000 nominal-damages rule for a just-cause dismissal carried out without the required notices. That amount is not a universal valuation of every violation; other relief depends on the claim and facts.

What an employee should do after receiving a positive result

Act promptly, but avoid signing an admission, resignation, or quitclaim that you do not understand.

Ask whether the result is only a screening result. Request the confirmatory-test result and the dates on which both tests were performed.
Verify the laboratory. Ask for the laboratory’s complete name and proof that it was DOH-accredited when the test was conducted.
Request relevant records in writing. These may include the laboratory report, specimen-control or chain-of-custody documents, test notices, consent or acknowledgment forms, and the employer’s drug-free workplace policy.
Disclose legitimate medication carefully. Preserve prescriptions, medicine packaging, medical certificates, and the prescribing physician’s contact details. Provide medical information only through an appropriate confidential channel.
Answer the notice to explain. Address factual errors, accreditation or testing defects, prescription medication, specimen-handling concerns, inconsistent enforcement, and any request for assessment or rehabilitation. Attach copies, not irreplaceable originals.
Request a conference or hearing in writing if facts are disputed. Identify the records or witnesses needed to explain your side.
Do not alter evidence or attempt to influence witnesses. Keep the original messages, notices, envelopes, emails, and test records in their original form.
Consult your union if covered by a CBA. The CBA may provide a grievance process, additional notice requirements, testing safeguards, or progressive discipline.
Seek labor assistance promptly. Even when management describes the action as a suspension, non-renewal, forced resignation, or failure to report, legal advice may be necessary if the practical effect is loss of employment.

An employee who is impaired at work, is experiencing withdrawal, or performs safety-critical duties should prioritize medical and workplace safety. Do not operate vehicles or dangerous machinery while impaired.

Evidence worth preserving

Keep a secure chronological file containing:

Employment contract, job description, and proof of regular or probationary status;
Employee handbook and the version of the drug policy in effect on the test date;
Proof that the policy was—or was not—communicated to employees;
CBA provisions and union communications;
Screening and confirmatory laboratory reports;
Proof of the laboratory’s accreditation at the relevant time;
Specimen numbers, collection forms, seals, and chain-of-custody records;
Prescriptions, medical certificates, and a list of medicines or supplements taken;
Notices to explain, written responses, meeting invitations, and minutes;
Suspension and termination notices;
Emails, text messages, chat records, and courier receipts;
Payslips, time records, leave balances, and final-pay computations; and
Names of people who witnessed collection, labeling, meetings, or inconsistent treatment.

Drug-test and medical information is sensitive. Share it only with the union representative, lawyer, health professional, agency, or tribunal that needs it, and store copies securely.

Common mistakes

Treating an initial screening as final

A positive screening result must be confirmed. Employers should not impose dismissal based solely on the first-stage test.

Assuming rehabilitation is always required—or never relevant

The proper intervention depends on the assessment, company policy, clinical findings, prior drug use or treatment, workplace risks, and other facts. A first result is not automatically a guarantee against dismissal, but neither should referral provisions be ignored.

Relying only on an independent negative test

A later negative result may be useful but is not conclusive by itself. It should be paired with evidence addressing timing, accreditation, confirmatory testing, medication, specimen identity, or procedural defects.

Resigning under pressure

A hurried resignation can complicate an illegal-dismissal case. If told to “resign or be terminated,” document the exact words, date, place, witnesses, and surrounding pressure before signing anything.

Ignoring a notice to explain

Silence may leave the employer’s evidence unanswered. Submit a timely, factual response even if complete records have not yet been provided. State which documents are missing and reserve the right to supplement your explanation.

Posting the dispute online

Publishing test results, accusations, or the identities of laboratory personnel may create privacy, employment, or defamation complications. Preserve evidence privately and use formal channels.

Where to seek help

For a private-sector dispute, an employee or employer may file a Request for Assistance under the Single Entry Approach. SEnA generally provides up to 30 calendar days of mandatory conciliation-mediation before an unresolved labor dispute proceeds to the proper forum.

Requests may be filed onsite through participating DOLE, National Conciliation and Mediation Board, or NLRC offices, or through available online channels. Current information is available through the official DOLE Assistance and Referral Management System.

An unresolved illegal-dismissal complaint is generally filed with the appropriate NLRC Regional Arbitration Branch after the mandatory conciliation process. The 2025 NLRC Rules of Procedure govern current NLRC proceedings.

An illegal-dismissal claim generally prescribes in four years from accrual, while many separate money claims arising from employment prescribe in three years. Filing a SEnA request tolls the applicable period under the current NLRC rules. Do not wait for the deadline: evidence, witnesses, and electronic records may disappear much earlier.

When legal help is urgent

Consult a labor lawyer, union officer, or workers’ assistance desk promptly if:

Termination is threatened based only on a screening result;
No confirmatory test was performed or released;
The laboratory’s accreditation is doubtful;
The specimen may have been mislabeled, substituted, contaminated, or improperly handled;
You were dismissed without written charges or a chance to answer;
Management demands an immediate resignation or quitclaim;
The result may be explained by prescribed medication;
Confidential medical information has been disclosed to unauthorized people;
The employer is selectively testing or disciplining workers;
Your work involves driving, aviation, security, heavy machinery, healthcare, or another safety-sensitive function;
You are covered by a CBA with short grievance deadlines; or
You have already received a termination decision.

Public-sector employees should seek advice specific to civil-service rules. Government personnel are governed by Republic Act No. 9165 together with Civil Service Commission, Dangerous Drugs Board, and agency rules, which differ materially from private-sector procedures and sanctions.

Frequently asked questions

Can an employer fire someone after only one positive screening test?

Ordinarily, no. Republic Act No. 9165 requires a confirmatory test. The Supreme Court has rejected a dismissal where the employer relied on an unconfirmed screening result and did not establish the clinic’s accreditation.

What if both screening and confirmatory tests are positive?

The result can support disciplinary action and, depending on the evidence and circumstances, dismissal for serious misconduct. The employer must still apply its policy fairly, consider any required assessment or intervention, and observe procedural due process.

Does the employee have a right to rehabilitation instead of dismissal?

Not in every case. DOLE’s framework provides for assessment and possible referral, particularly for first-time drug dependence, voluntary requests for assistance, or employees who would benefit from treatment. The precise consequence depends on the assessment, workplace policy, job risks, previous intervention, and proven facts.

Who pays for the workplace drug test?

For random employee testing under Section 36(d) of Republic Act No. 9165, the employer bears the testing cost. Treatment or rehabilitation expenses are generally charged to the employee under the DOLE guidelines unless a company policy, CBA, or benefit plan provides otherwise.

Can prescription medicine explain a positive result?

Possibly, but the effect depends on the substance, laboratory method, confirmatory findings, and medical evidence. Preserve the prescription and promptly disclose it through a confidential occupational-health or disciplinary channel. Do not stop prescribed medication without medical advice.

Is a hearing always required?

The employee must receive a meaningful opportunity to be heard. A formal hearing or conference is particularly required when requested in writing, when substantial evidentiary disputes exist, when company rules require one, or when similar circumstances justify it.

What if the employer had a valid reason but gave no notices?

A proven just cause may still make the dismissal valid, but failure to comply with statutory due process can expose the employer to nominal damages. Lack of notice does not cure a weak, unauthorized, or unconfirmed drug test; the employer must separately prove a valid cause.

Can drug-test results be announced to co-workers?

They should be handled confidentially and only by authorized persons for legitimate workplace, medical, or legal purposes. Drug-test and medical information may also constitute sensitive personal information under the Data Privacy Act. An improper disclosure should be documented and may warrant advice from the National Privacy Commission or counsel.

Official sources

This article provides general legal information, not legal advice or a prediction of any case’s outcome. Employment status, laboratory documents, company rules, the CBA, test procedures, job risks, and disciplinary records can change the analysis. Sources and procedures were checked as of July 27, 2026.