THC vs CBD: Understanding the Difference for Medical Patients
THC vs CBD explained for UK medical cannabis patients. How they work differently, which is better for your condition, and what balanced products offer.
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The Two Main Cannabinoids
Cannabis contains over 100 cannabinoids, but two dominate clinical prescribing: THC (tetrahydrocannabinol) and CBD (cannabidiol). Understanding how they differ is fundamental to getting the most from your prescription.
THC: The Psychoactive Component
THC acts on CB1 receptors in the brain. Therapeutic effects: pain relief (strongest evidence for neuropathic pain), anti-nausea, muscle relaxation, sleep induction and mood elevation. Side effects: cognitive impairment, anxiety at high doses, dependency with heavy long-term use.
CBD: The Non-Psychoactive Component
CBD does not produce intoxication. Therapeutic effects: anxiolytic, anti-inflammatory, neuroprotective, anticonvulsant. CBD also reduces THC-induced anxiety and cognitive impairment.
The Entourage Effect
Full-spectrum products containing multiple cannabinoids and terpenes tend to outperform isolates. CBD reduces THC-induced anxiety. Terpenes like myrcene and linalool add sedative effects. Minor cannabinoids like CBN and CBG contribute additional therapeutic properties.
Which Is Better for Your Condition?
- Neuropathic pain: THC-dominant or balanced CBD:THC
- Anxiety: CBD-dominant - THC can worsen anxiety at higher doses
- Sleep: THC or CBN for onset; CBD for anxiety-driven insomnia
- Spasticity (MS): Balanced CBD:THC mimicking the Sativex ratio
- Epilepsy: High-dose CBD
- PTSD: CBD as baseline; low-dose THC or CBN for sleep and nightmares