Effects of Gabapentin on EMG Question

Posted by mayoscout @mayoscout, Aug 31 1:09pm

Does anyone know if after taking Gabapentin for a while and noticing relief from your neuropathy can it trigger a false positive on an EMG to where it looks like your neuropathy is not present?

I ask because my situation is this. I have had multiple four EMGs in the past few years that started with showing a progressive neuropathy and proceeding EMGs confirming the progression to all over my body and worsening. I was then sent to another neurologist to help try to find the cause of the neuropathy. The new doc wanted to do their own EMG (like they all do) before proceeding with further appointments. During the EMG the doc just did a section of my body whereas all past EMGs from other neuros were full body. After the doc was done they spun around in the chair and said "good news you don't have neuropathy".

That obviously would be great news if I agree with them but my body tells me otherwise. I'm starting to lose function in parts of my body due to more nerve issues and other docs are saying to start considering more surgeries again to repair the problems before I lose total function. But I have this one neuro who basically says I'm cure and to have a nice day.

I'm just curious on if the medication is triggering a false positive and if anyone knows if that could be the case? From what I read online it is probable, but there is not enough research on it so I am looking to others who may have experience with this.

Thank you

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Profile picture for johnmacc @johnmacc

Hi. I spend an hour each morning in stretching and yoga for my whole body including my feet with idiopathic poly neuropathy since diagnosed in 2012. I was also taking 3600 mg of Gabapentin daily for the last few years. My new neurologist has asked me to switch to Lyrica so I did. I never had problems with Gabapentin , I just didn't enjoy taking 12 pills daily. Now I only take 3 200 mg Lyrica dairy with no noticable change in pain level in my feet. These drugs hide about half of the pain daily depending on how much walking and gym work I do. John

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You are one of the fortunate people who can take it. I know a few others who have no problem. I also know several who had same side effects I do. I added squats yesterday as far as I can for 10 seconds and repeat 6 times. I will do this 5 times a day. It is very difficult to do but today is better than yesterday and I know it will just get better. Exercise is a must to keep muscles healthy. Digestion is affected in my health. Ginger root and clove tea homemade is really helping and that is wonderful. You really have a good routine established. I don’t like taking pills at all.

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Profile picture for johnmacc @johnmacc

Hi. I spend an hour each morning in stretching and yoga for my whole body including my feet with idiopathic poly neuropathy since diagnosed in 2012. I was also taking 3600 mg of Gabapentin daily for the last few years. My new neurologist has asked me to switch to Lyrica so I did. I never had problems with Gabapentin , I just didn't enjoy taking 12 pills daily. Now I only take 3 200 mg Lyrica dairy with no noticable change in pain level in my feet. These drugs hide about half of the pain daily depending on how much walking and gym work I do. John

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I've also been taking 3600mg of gabapentin every day, 12 300mg capsules just like you. Did you make the switch mainly because of how many pills you were having to take on a daily basis? You didn't really notice any difference in your pain level after switching?
I'm already taking so many pills a day it's ridiculous, 9 prescriptions and several OTC supplements. For myself, I wouldn't change my routine, mainly because of the possible side effects in doing so. I don't enjoy living on 9 different meds, but the possibility of a negative reaction isn't worth it IMO.

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@mayoscout
What type of surgery have you been recommended to get?

I have read that gabapentin and Lyrica/pregabalin can affect EMG and nerve conduction study results. I think it slows things down but would not think it makes a condition disappear and seem to “cure” a nerve problem.

Do you have spine issues and spinal cord/nerve compression (have you had MRIs)? Are your neuromuscular issues tied to this or something systemic? Do all of your bloodwork results fall within normal levels?

I have had 2 cervical and 1 lumbar spine surgeries and have been diagnosed with idiopathic small fiber neuropathy with skin punch biopsy. Did you have this biopsy done and were you told you have large or small nerve fiber damage? Did you ever get a MRI of your brain?

I have taken both gabapentin and Lyrica and don’t like the side effects. I get severe nerve pain in hips/hip flexors and just recently started taking Lyrica again and it is making me dizzy, depressed, feel more nerve pain throughout my body and nerve zaps, feel like my brain is shutting down, more weak, etc. I am in my mid 50s and this really affects quality of life. I am going to stop taking the Lyrica gradually (only taking 25mg 2 times per day now so should be able to taper easily).

I think I need to get an update MRI of my cervical and lumbar spine to see if I have new compression causing my symptoms. I don’t want to rely on medication for pain if it is going to cause more side effects and long term damage. I am going to start PT soon to see if I can improve muscle strength and flexibility plus circulation since I am so weak/deconditioned. I am afraid to hurt myself and need to go slow.

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Profile picture for mayoscout @mayoscout

As I appreciate everyone's input so far, I feel like the responses are no help to my question and as random replies pile up real answers to my question is going to get buried where others including myself won't be able to find later on.

Is it possible to keep responses related to the question?

Thanks

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I don’t know if Gabapentin would affect any nerve test.
I YouTube a lot for info. Possible a neuro doctor on YouTube would discuss your concern.

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Profile picture for dlydailyhope @dlydailyhope

@mayoscout
What type of surgery have you been recommended to get?

I have read that gabapentin and Lyrica/pregabalin can affect EMG and nerve conduction study results. I think it slows things down but would not think it makes a condition disappear and seem to “cure” a nerve problem.

Do you have spine issues and spinal cord/nerve compression (have you had MRIs)? Are your neuromuscular issues tied to this or something systemic? Do all of your bloodwork results fall within normal levels?

I have had 2 cervical and 1 lumbar spine surgeries and have been diagnosed with idiopathic small fiber neuropathy with skin punch biopsy. Did you have this biopsy done and were you told you have large or small nerve fiber damage? Did you ever get a MRI of your brain?

I have taken both gabapentin and Lyrica and don’t like the side effects. I get severe nerve pain in hips/hip flexors and just recently started taking Lyrica again and it is making me dizzy, depressed, feel more nerve pain throughout my body and nerve zaps, feel like my brain is shutting down, more weak, etc. I am in my mid 50s and this really affects quality of life. I am going to stop taking the Lyrica gradually (only taking 25mg 2 times per day now so should be able to taper easily).

I think I need to get an update MRI of my cervical and lumbar spine to see if I have new compression causing my symptoms. I don’t want to rely on medication for pain if it is going to cause more side effects and long term damage. I am going to start PT soon to see if I can improve muscle strength and flexibility plus circulation since I am so weak/deconditioned. I am afraid to hurt myself and need to go slow.

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I've been rec'd to have all sorts of surgeries. I already had one to repair foot drop, that never fully repaired it and was a bad surgery for me. I've been recommended to have back, surgery on both ulnar nerves, on both wrists to address the carpel tunnel that hasn't gone away since about 2016 and a couple of others that I can't think of of the top of my head. I do have cervical and spine issues but nothing severe enough from mri's that docs thought was the cause of all of the neuropathy. Blood work has all checked out fine. I started taking the gabapentin after the second or third emg to address symptoms as it was starting to get pretty painful. Cardiovascular has been ruled out. Just some sort of autonomic dysfunction happening that has been noted given other symptoms I had too like ocular issue that has happened randomly, hard muscles, severe spasms, twitching, atrophy, throat issues(closing up randomly), and the list goes on. Most of these have all been chalked up to some type of neuro cause. Symptoms of some things started at childhood, was part of the reason I was knocked out of a combat role in the military, and really progress in my early 30s. I'm bound to do small things now. Any time I increase activity I get put down for a day, two, or three. Genetic tests found a mutation in a gene associated with ALS type 4 but was ruled out given the single mutation.

There is a lot there. So I do not believe the neuropathy is just gone especially given that I still very much have they neuropathy symptoms. But this doc thinks they know all and it has frustrated the heck out of me. I should have never agreed to see this one as I wasn't supposed to see them in the first place but I decided to proceed anyway. This doc just did the one partial EMG, said no neuropathy, and that's it LOL. Not all docs are good. And it seems like med school these days may be doing a disservice to alot of these new doctors teaching them to focus on keywords that they hear and not looking at the whole picture (or in this case not looking at medical records at all). It's pretty sad for me to see a lot of these new docs trained to not think outside of the box.

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Profile picture for mayoscout @mayoscout

I've been rec'd to have all sorts of surgeries. I already had one to repair foot drop, that never fully repaired it and was a bad surgery for me. I've been recommended to have back, surgery on both ulnar nerves, on both wrists to address the carpel tunnel that hasn't gone away since about 2016 and a couple of others that I can't think of of the top of my head. I do have cervical and spine issues but nothing severe enough from mri's that docs thought was the cause of all of the neuropathy. Blood work has all checked out fine. I started taking the gabapentin after the second or third emg to address symptoms as it was starting to get pretty painful. Cardiovascular has been ruled out. Just some sort of autonomic dysfunction happening that has been noted given other symptoms I had too like ocular issue that has happened randomly, hard muscles, severe spasms, twitching, atrophy, throat issues(closing up randomly), and the list goes on. Most of these have all been chalked up to some type of neuro cause. Symptoms of some things started at childhood, was part of the reason I was knocked out of a combat role in the military, and really progress in my early 30s. I'm bound to do small things now. Any time I increase activity I get put down for a day, two, or three. Genetic tests found a mutation in a gene associated with ALS type 4 but was ruled out given the single mutation.

There is a lot there. So I do not believe the neuropathy is just gone especially given that I still very much have they neuropathy symptoms. But this doc thinks they know all and it has frustrated the heck out of me. I should have never agreed to see this one as I wasn't supposed to see them in the first place but I decided to proceed anyway. This doc just did the one partial EMG, said no neuropathy, and that's it LOL. Not all docs are good. And it seems like med school these days may be doing a disservice to alot of these new doctors teaching them to focus on keywords that they hear and not looking at the whole picture (or in this case not looking at medical records at all). It's pretty sad for me to see a lot of these new docs trained to not think outside of the box.

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@mayoscout
I highly recommend you get a new orthopedic spine specialist to look at your cervical spine. Your symptoms are similar to what I have had. I had 2 cervical spine surgeries and one lumbar surgery due to stenosis, osteophytes/bone spurs, disc herniations, spinal cord/flattening/compression (myelopathy cord injury), neurogenic claudication. I also had speaking and swallowing issue.

Have you received a copy of the Maria report and read through the details of the impressions noted by the radiologist? Look up each term so you understand what is being pointed out.

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Profile picture for dlydailyhope @dlydailyhope

@mayoscout
I highly recommend you get a new orthopedic spine specialist to look at your cervical spine. Your symptoms are similar to what I have had. I had 2 cervical spine surgeries and one lumbar surgery due to stenosis, osteophytes/bone spurs, disc herniations, spinal cord/flattening/compression (myelopathy cord injury), neurogenic claudication. I also had speaking and swallowing issue.

Have you received a copy of the Maria report and read through the details of the impressions noted by the radiologist? Look up each term so you understand what is being pointed out.

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@mayoscout
*MRI (not Maria) report. 😉

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