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Dr. Cannabis

Muscle spasms

Involuntary muscle contraction. Evidence is strongest in MS spasticity; weaker for spasms from other causes.

Limited evidenceWeak evidence from fair-quality studies, or mixed findings.

What the evidence says

Substantial evidence exists only for MS spasticity. NASEM found insufficient evidence for spinal cord injury spasticity, and did not assess ordinary muscle cramps.

The substantial evidence here is specific to multiple sclerosis spasticity. NASEM found no or insufficient evidence for spasticity from spinal cord injury.

For ordinary muscle cramps and spasms, there is no established cannabis evidence base. Hydration, electrolytes, and stretching have better support and cost less.

What to ask for

This is a starting point, not a prescription. Take it to a licensed dispensary and ask to see the batch certificate of analysis.

Suggested ratio
Balanced 1:1
Starting THC dose
2.5 mg
Commonly chosen profile
Indica-leaning
Time of day
either

Cannabinoids

  • THC

    The main intoxicating compound in cannabis. It drives most of what people mean by "high," and it is also the cannabinoid behind most documented therapeutic effects.

  • CBD

    Non-intoxicating. The only cannabis-derived compound with an FDA-approved medicine behind it, and the cannabinoid most often used to soften THC.

Terpenes to look for

Commonly present in products people choose for this. Terpene effect claims are preclinical — this is a way to find a product again, not a promise about how it will feel.

Formats

  • TopicalOnset 15–60 min · lasts 2–6 h

    Creams, balms, and patches applied to skin. Non-transdermal topicals do not produce intoxication.

  • TinctureOnset 15–90 min · lasts 4–8 h

    Liquid extract dosed by dropper. The most precise way to titrate an oral dose in small increments.

Get a personalised starting point

Answer four questions and we will adjust the dose for your experience level and find licensed dispensaries near you.

Get guidance

Talk to a doctor if

  • • Spasms come with weakness or numbness
  • • Spasms are new and unexplained
  • • You have had a spinal injury

Related conditions

Sources

  1. NASEM 2017, Committee Conclusions (summary PDF of all evidence-tier conclusions).Accessed 2026-08-15.