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THC & cannabis vapes

Products sold as THC, CBD or cannabis vapes can look much like ordinary nicotine vapes. The problem is that an illicit product may contain a different drug from the one advertised, including synthetic cannabinoids such as Spice.

Last reviewed: 25 September 2026

QUICK ANSWER

You cannot reliably identify the contents of an illicit vape by its label or appearance.

In 2025–26, 43% of THC, CBD or cannabinoid vape samples submitted to WEDINOS contained synthetic cannabinoid receptor agonists (SCRAs). That figure describes samples submitted for testing, not all vapes in Wales, but it shows why assumptions based on packaging can be risky.

THC, CBD and cannabis vapes: what do those words mean?

THC

THC is the main psychoactive chemical in cannabis. It can affect mood, perception, coordination and memory.

CBD

CBD is another cannabis compound. It does not produce the same intoxicating effects as THC, although products can contain other ingredients too.

Synthetic cannabinoids

Human-made chemicals that act on cannabinoid receptors. Some are much more potent and unpredictable than THC.

Why are illicit cannabis vapes a concern?

There are two separate questions: the effects of THC itself, and whether the product actually contains what it claims. Illicit products are not quality-controlled in the same way as licensed medicines or regulated consumer products.

WEDINOS has repeatedly identified synthetic cannabinoids in products submitted as THC, CBD or cannabis vapes. Synthetic cannabinoids can produce very different and sometimes more severe effects, including confusion, agitation, paranoia, vomiting, chest symptoms, seizures or loss of consciousness.

The label may be wrong

Names, flavours and packaging are not proof of contents or strength.

Strength can vary

Even two products that look the same may not contain the same drug or concentration.

Young people may think it is ‘just THC’

That misunderstanding matters when staff are responding to symptoms or deciding whether urgent medical help is needed.

What should schools do if they find one?

  • Start with health and safeguarding. If a young person is unwell, deal with the medical situation first.
  • Do not assume the label is accurate. “THC”, “CBD” or a cannabis leaf symbol does not confirm the contents.
  • Do not taste, smell closely, inhale or informally test the product.
  • Follow your school or organisation’s policy for confiscated substances and safeguarding concerns.
  • Record what is known: packaging, name used, where it came from, what the young person says they took, and symptoms.
  • Use WEDINOS and specialist services for current drug-market information rather than trying to identify a substance yourself.

When to call 999

Call 999 if someone collapses, has a seizure, is struggling to breathe, becomes severely confused or agitated, loses consciousness, or you are seriously worried after drug use. Tell the ambulance crew what you know about the product, even if you are unsure what it contained.

Related help and information

Spice & synthetic cannabinoids

What Spice is, why it can appear in vapes, possible effects and practical advice for schools.

WEDINOS

Current Welsh drug-testing information and trends from submitted samples.

DAN 24/7

Free bilingual drug and alcohol information and support for people in Wales, families and professionals.