Cannabis Drug Testing

Fast and accurate cannabis testing from our award-winning, accredited laboratory

We test for the widest range of drugs – including cannabis – using the following methods:

  • Hair
  • Oral fluid (saliva)
  • Urine
  • Nails

We offer the greatest choice of sample collection options, including our nationwide walk in centres, home address, workplace, or other chosen location.

To discuss which drug test is best for you, call us now on 0333 600 1300, email, or complete the form opposite to request a call back.

To discuss which drug test is best for you, call us now on 0333 600 1300, email, or complete the form below to request a call back.


Cannabis drug testing for legal professionals, social workers, members of the public, and employers

Cannabis is the one of the most-used illicit drugs in the UK, and the substance most commonly seized by police. It is highly detectable using drug tests and can be found in urine, saliva, hair and nail clipping samples – long after the drug has been consumed and the effects have worn-off.

Some common street names for cannabis include dope, grass, blow, ganja, hash, joint, weed, pot, moroccan and marijuana.

Cannabis is a class B controlled drug in the UK, with a maximum 5 year prison sentence for possession, and up to 14 years for supplying.

Cannabis drug test for legal professionals, social workers and local authorities

AlphaBiolabs has over 20 years’ experience working with solicitors, social workers and local authorities, providing rapid drug test results and user-friendly reports that are accepted in every UK family court.

More reasons to choose AlphaBiolabs for court-admissible drug testing:

  • Rapid results from our UK laboratory
  • UKAS 17025-accredited laboratory (No. 2773)
  • Member of the Society of Hair Testing with analysis carried out to internationally-agreed standards
  • All pricing within Legal Aid Agency rates
  • Our Price Promise: we will beat any like-for-like quote by a further 10%
  • Expert advice and a dedicated Case Manager to fully manage your instruction
  • Innovative and FREE Drug Screen Plus Service
  • Sample collections from any location within 24-48 hours of instruction
  • FREE legally-instructed sample collections at our nationwide walk-in centres

To request a quote, call our dedicated Legal team on 0333 600 1300, email or fill in our online quote form.

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Cannabis drug test for official matters

If you are an individual who needs a drug test for an official matter, we can help.

We have extensive experience providing drug testing for members of the public and are perfectly placed to support you with accurate and reliable laboratory testing for legal and official purposes.

Reasons you might need a drug test for official matters:

  • You are a parent/guardian whose child requires a negative drug test result for educational reasons e.g. school, college or university
  • You are a contractor or consultant who requires a drug or alcohol test to start work
  • For private legal matters e.g. child custody proceedings or divorce proceedings
  • For industrial tribunal proceedings
  • For other legal issues (e.g. driving offences)

Our drug test results are accepted by a wide range of organisations and institutions including Family Court, public bodies/government agencies (Child Maintenance Service, Home Office, UK Visas & Immigration), businesses of all sizes across all sectors, and educational institutions.

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Cannabis drug test for the workplace

AlphaBiolabs has over 20 years’ experience providing comprehensive drug and alcohol testing services – including sample collection and laboratory analysis – for businesses and employers.

More reasons to choose AlphaBiolabs for your workplace drug testing:

  • Fastest results in the industry
  • Random, For cause, Pre-employment, Post-rehab and Return-to-work testing available
  • Full range of testing methods to suit all budgets, business needs and sectors
  • Support with substance misuse policy creation and review
  • Drug and alcohol awareness training for managers and employees
  • Sample collection training for in-house collection
  • Dedicated Account Manager and access to our scientific expertise

To request a quote, call 0333 600 1300, email, or complete our online quote form.

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Home cannabis drug test for peace of mind

Whether you have concerns about a loved one misusing drugs, or simply want a drug test for other personal reasons, AlphaBiolabs can help.

We offer a range of peace of mind, at-home drug tests to suit your needs, including:

Whichever test you choose, your test kit will contain everything you need to collect your own samples in the comfort of your own home and, where appropriate, return your samples to our laboratory for testing.

Please note, the results of these tests are for personal use only and are not admissible in court. If you require a drug test for court, you will need a legal drug test.

Order your peace of mind drug test online now, call our Customer Services team on 0333 600 1300 or email

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Frequently asked questions

Cannabis is a drug derived from the Cannabis sativa or Cannabis indica plant, a bushy plant that grows wild in many parts of the world and is easily cultivated in Britain.

The main active ingredient in cannabis is tetrahydrocannabinol (THC), the psychoactive compound that can make the user feel happy or relaxed.

However, it can also have more serious side effects with continued use, causing a person to become paranoid or experience hallucinations.

Other forms of cannabis include:

  • Cannabinol (CBN) – a cannabinoid (compound found in the cannabis plant). Unlike THC, CBN produces few, if any, psychoactive effects.
  • Cannabidiol (CBD)– a cannabinoid that is commonly sold online and in select shops in the form of CBD oil. CBD produces few, if any, psychoactive effects. However, it is heavily regulated in the UK and must not contain more than 0.2% THC when sold over the counter.

Levels of THC, CBN and CBD can vary widely depending on several factors, including the variety of cannabis plant, and how the cannabis has been prepared (e.g. loose leaves, resin, oil etc).

Learn more: Cannabis facts

Cannabis is most commonly inhaled, either by smoking or vaping, or ingested in hash or resin form.

It is also used as an ingredient in ‘cannabis edibles’ such as teas, sweets and cakes.

Learn more: What are the effects of cannabis use?

Even after the ‘high’ has worn off, and long after the drug was first consumed, cannabis use can be detected by a drug test, depending on the type of test you take.

The drug testing detection windows for cannabis are as follows:

  • Oral fluid (saliva) – up to 48 hours
  • Urine – up to 4 days
  • Hair – up to 12 months (depending on the length of hair available)
  • Nails – up to 12 months (up to 6 months for fingernails and up to 12 months for toenails)

Oral fluid and urine drug testing are known as ‘narrow-window’ forms of testing and can be used to detect drug use from 30 minutes after consumption, up to a few days.

This can vary depending on the type of substance and how much was used.

The rate at which hair and nails grow means that both hair drug testing and nail drug testing can provide a ‘wide-window’ of detection for drugs and their metabolites (up to 12 months).

Learn more: How long does cannabis stay in your system?

The type of drug test you need depends on your circumstances, and how you intend to use the results of the test.

We offer four types of drug test to detect cannabis use:

  • Urine
  • Oral fluid (Saliva)
  • Hair
  • Nail

Urine drug tests and oral fluid drug tests provide a narrow window of detection, meaning that they can only tell us whether an individual has been using drugs in the few days prior to the samples being collected.

A urine drug test provides a window of detection up to four days. An oral fluid (saliva) drug test provides a window of detection up to 48 hours.

This makes urine and oral fluid drug tests ideal for circumstances where an individual is suspected to be under the influence of drugs in the ‘here and now’, or for day-to-day monitoring of drug use.

Hair drug tests and nail drug tests provide us with a wide window of detection (up to 12 months). This is due to the way in which drugs are retained in the hair and nails, long after substances were first consumed.

Hair drug tests can be used to identify a month-by-month pattern or an overview of drug use (segmented or overview analysis) for up to 12 months. Nail drug tests are ideal where hair testing is not possible, providing an overview of historic drug use up to six months (fingernails) or up to 12 months (toenails).  

If you require a drug test for legal reasons, or other official matters, you will need to instruct us for a legal drug test. For a legal drug test, samples are collected by a professional sample collector under strict chain of custody conditions, ensuring the test results are court-admissible.

If you require a drug test for personal reasons, our range of peace of mind, at-home drug tests are ideally suited for this purpose. For these tests, you can collect your own samples in the comfort of your own home and return them to our laboratory for testing. The results of these tests cannot be used in court or for official matters.

For advice on which test is best for you, call our friendly, discreet Customer Services team on 0333 600 1300 or email


Order a cannabis drug test now

Call 0333 600 1300 or email

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