CBD or cannabis for pain: types and differences from opioids

By Isabella TortaOctober 06, 2025

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Cannabis for pain therapy has become a central topic in the medical debate in recent years, especially for those suffering from chronic pain who are seeking alternatives to opioids.

However, not all available options offer a real therapeutic benefit, and the risk of side effects, particularly related to THC, remains high.

Understanding the differences between various phytocannabinoids (such as THC, CBD, CBG, and CBN), between prescription galenical products (such as FM2 or Bedrocan), and between isolated CBD and cannabinoid drugs is essential today to make an informed choice.

This article aims to be a comprehensive guide to the difference between therapeutic cannabis and CBD in pain therapy, with a special focus on the role of isolated CBD, the only cannabinoid free from psychoactive effects, as it is a single molecule with real modulating efficacy and long-term safety.

CBD or cannabis for pain?

In Italy, the therapeutic cannabis available in pharmacies is classified based on the plant variety, the content of THC and CBD, and the method of administration (oil, inflorescences, capsules). The main varieties are:

FM2 (produced by the Military Pharmaceutical Chemical Plant): contains THC between 5-8% and CBD between 7-12%.
Bedrocan: high THC content (22%), with minimal traces of CBD.
Bediol: with a more moderate balance between THC and CBD.
Pedanios, Aurora, Tilray: from foreign crops, with variable contents.

The choice of variety directly influences the action profile and side effects. However, the presence of THC makes prolonged and safe use difficult, especially in patients unaccustomed to psychoactive molecules.

👉 This is why many healthcare professionals are moving towards solutions like isolated CBD, which allows for pain therapy free from cognitive distortions, anxiety, or addiction.

Cannabis: is FM2 really effective?

In the context of cannabis for pain therapy, FM2 is currently one of the most prescribed for conditions such as multiple sclerosis, fibromyalgia, and peripheral neuropathies.

But its efficacy depends heavily on the presence of THC, which acts by activating CB1 receptors in the brain.

This stimulation produces a masking effect on pain, not a true resolution:

✅ Rapid relief, but only temporary.
❌ Pharmacological tolerance that requires increasing doses.
❌ Psychiatric risks, such as anxiety, mood swings, or paranoia.

👉 The palliative effect of THC does not represent a stable therapeutic solution.

Conversely, isolated CBD acts on peripheral and central receptors in a modulating and long-lasting way, without creating addiction or cognitive alterations, making it the safer choice of cannabis in pain therapy.

What are the side effects of FM2 cannabis?

FM2, produced in Italy for therapeutic use, is among the most distributed varieties in pharmacies. It contains significant amounts of THC, which entails numerous adverse effects:

Drowsiness, dizziness, and fatigue.
Cognitive difficulties, such as memory loss and attention problems.
Emotional changes → anxiety, mood swings, paranoid episodes.
Cardiovascular disorders → tachycardia, drop in blood pressure.
Addiction and tolerance → underestimated risk.

👉 All these effects stem from the direct activation of CB1 receptors by THC, without physiological modulation.

Isolated CBD, on the contrary, acts on receptors such as:

CB2 → anti-inflammatory and neuroprotective action,
TRPV2 → muscular and inflammatory pain,
5-HT2C → mood regulation,
Adenosine A1 → cardiovascular protection,
Sodium channels → neuronal stability.

📌 The safety profile of isolated CBD makes it preferable for all long-term therapies, without having to face the side effects of THC.

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Some recommended products for choosing truly pure and certified isolated CBD

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Cannabinoids: are they all really painkillers?

Over 120 phytocannabinoids have been identified in the Cannabis sativa plant, but only a few show significant efficacy in pain management:

THC → Acts on CB1 receptors. It is the main psychoactive compound: it reduces pain perception but induces addiction, tolerance, and alteration of cognitive functions.
CBG → Potentially anti-inflammatory and neuroprotective action, but still lacking solid clinical studies.
CBN → Weak sedative effect. Has no significant clinical role in pain.
Isolated CBD → The most studied and safe:
- Acts on CB2 (anti-inflammatory),
- TRPA1 (neuropathic pain),
- GPR55 (neuromodulation),
- Dopamine D2 (motivation and mood tone),
- Adenosine A2A (relaxation and neuroprotection).

👉 Isolated CBD is the only phytocannabinoid that offers complex and safe modulation, without mental alterations or tolerance. For this reason, it is currently the main candidate for effective and sustainable pain therapy.

Difference between isolated CBD, cannabis, and opioids

A common mistake is to compare therapeutic cannabis and opioids as if they were equivalent in pain treatment. In reality, the differences are substantial:

Opioids

They act on μ and κ receptors in the brain.
They block pain transmission at the central level.
They cause rapid tolerance, addiction, and risk of overdose.
Indicated only in extreme conditions like cancer pain.

Cannabis with THC

It stimulates CB1, altering pain perception.
It can cause anxiety, drowsiness, cognitive distortions.
Long-term use leads to unstable benefit and habituation.

Isolated CBD

Modulates, does not suppress: it acts physiologically.
Stimulates CB2, TRPV1, 5-HT1A, glycine, and dopamine receptors.
Without addiction, without tolerance, without psychoactive effects.

👉 Pain therapy finds in isolated CBD a natural and safe alternative to opioids and THC, with more sustainable long-term pain management.

Therapeutic cannabis and pain: unfulfilled promises

Despite the promises of therapeutic cannabis in treating pain, clinical evidence remains contradictory. Many patients report subjective improvements, but scientific studies highlight:

Efficacy limited over time.
High risks with continuous THC use.
Difficulty in personalizing the therapy.

Isolated CBD, instead, stands out for:

A broad receptor profile (CB2, TRPV1, 5-HT1A, GABA-A, calcium channels),
Modulating and progressive action on neuropathic, visceral, and inflammatory pain,
Safety even with daily use, without negative interactions.

👉 The true innovation in cannabis pain therapy is represented by isolated CBD, which acts where it is needed, how it is needed, without side effects.

Discover how isolated CBD can help with various pathologies

👉 Continue following us on the blog: in the next articles, we will talk about all the pathologies that can be supported by isolated CBD.

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