Cannabis syrup effects
Cannabis syrup effects begin 30 to 120 minutes after ingestion. They peak at 2 to 4 hours. They last 4 to 8 hours. Effects include relaxation, euphoria, dry mouth, red eyes, and impaired coordination. High doses cause anxiety, paranoia, fast heart rate, and vomiting. Syrup is a liquid edible. The liver converts THC into 11-hydroxy-THC. This metabolite is more potent than THC. That is why edible effects are stronger and longer than smoking.
Onset and duration
Onset: 30 to 120 minutes. Peak: 2 to 4 hours. Duration: 4 to 8 hours. Food in the stomach delays onset. A full stomach can add 60 minutes. An empty stomach shortens onset.
Common effects
- Relaxation
- Euphoria
- Dry mouth
- Red eyes
- Impaired coordination
- Increased appetite
- Altered perception of time
Side effects and risks
- Anxiety
- Paranoia
- Fast heart rate
- Nausea
- Vomiting
- Dizziness
- Confusion
- Memory problems
High doses cause psychosis in some people. Emergency room visits from edible cannabis increased after 2017. A 2021 study in Colorado found 2,567 ER visits for cannabis in one year.
Dose control
Syrup THC content varies. One bottle may contain 100 mg THC. One serving may be 5 mg. Labels may be wrong. A 2020 study in JAMA found 20% of edibles had more THC than labeled.
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Drug interactions
Cannabis syrup interacts with:
- Alcohol
- Benzodiazepines
- Opioids
- Antidepressants
- Blood thinners
These interactions increase sedation, heart rate, or bleeding risk. Talk to a doctor.
Who should avoid
People under 21. Pregnant women. People with heart disease. People with a history of psychosis. People who drive or operate machines.
Legal status
Federal law: cannabis is Schedule I. State law varies. In 2024, 24 states legalized recreational cannabis. 38 states legalized medical cannabis.