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HomeHealth ConditionsChronic PainBotox injections to treat nocturnal calf cramps

Botox injections to treat nocturnal calf cramps

While nocturnal calf cramps are generally insignificant, if chronic, they can significantly perturb one’s quality of life.

Nocturnal calf cramps are more prevalent in lumbar spinal stenosis, and botox injections were explored as a treatment for these leg cramps in such individuals.

Nocturnal calf cramps (NCCs) are not uncommon in the general population and consist of sudden, uncontrolled muscle contractions in the lower leg.

While uncomfortable, they generally do not have a large impact on one’s life.

However, in chronic cases, NCCs can cause serious sleep disturbances and be detrimental to quality of life.

NCCs are common in patients with lumbar spinal stenosis (LSS). LSS occurs when the spinal column narrows, increasing pressure on the spinal cord in the lumbar region.

This results in tingling, weakness, and/or numbness radiating from the low back into the lower limbs.

Even after decompression surgery, some patients with LSS still experience NCCs.

Since Botox interferes with nerve signaling, resulting in the relaxation of muscles, a recent clinical trial investigated whether Botox injections for nocturnal calf cramps could be a beneficial treatment in patients with lumbar spinal stenosis.

The patients were randomly assigned to one of two treatment groups.

Both groups were assigned to receive ‘conservative treatment’ (exercise, analgesics, injection therapy, and physical therapy). In addition to conservative therapy, one group received gabapentin, while the second group was treated with Botox injections.

In a study published in the Archives of Physical Medicine and Rehabilitation, researchers investigated the efficacy of injecting botulinum toxin (Botox) into the calves of LSS patients suffering from frequent leg cramps (NCCs).

Botulinum toxin inhibits the release of acetylcholine, promoting muscular relaxation. 50 LSS patients were recruited who reported suffering from NCCs at least once a week for more than six months.

The NCCs needed to occur at night during rest and not preceded by exercise.

Patients were split into two groups, both of which underwent basic NCC treatment such as exercise, physical therapy, and analgesic medication.

In addition, one group received Botox injections while the other received gabapentin, an anticonvulsant. The same pain physician performed all Botox injections.

The researchers found that frequency and intensity, and resultant leg pain severity, were all decreased by Botox injections with a greater benefit than with gabapentin.

Botox acts in both muscular and neurogenic capacities, so its effects on NCCs may deal with both muscular contraction and pain sensation.

As expected, with decreased NCC symptoms the patients reported improved sleep quality, an important factor in quality of life.

The study was, however, limited by a small and relatively ethnically homogenous population, as well as a lack of a placebo test due to ethical concerns about non-treatment.

Regardless, Botox injections appear to be a promising treatment for NCCs in patients suffering from LSS who are unresponsive to conventional treatments.

They appear beneficial compared to other medications and last several months, reducing the dose frequency and resultant toxicity.

Further studies should focus on the long-term efficacy and safety of Botox, as well as its cost-effectiveness.

 

Written By: Wesley Tin, BMSc

 

Reference:

Park SJ, Yoon KB, Yoon DM, Kim SH, Botulinum toxin treatment for nocturnal calf cramps in patients with lumbar spinal stenosis: A randomized clinical trial, Archives of Physical Medicine and Rehabilitation. (2017), doi: 10.1016/j.apmr.2017.01.017.

Image by HeungSoon from Pixabay

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