How long does gabapentin take to work for nerve pain? While early improvement may be seen during the first few days to 1–2 weeks, a full effect may require several weeks, especially since gabapentin is often initiated in a low dose and raised gradually. The speed of effect depends on the causes of the nerve pain, dose level, renal function, other drugs and individual factors.
Gabapentin differs from a quick-acting analgesic like acetaminophen or an NSAID. Gabapentin modifies the abnormal nerve signaling, hence, the effect may develop gradually rather than immediately after the first dose.
Gabapentin Timeline For Nerve Pain Relief
Although the exact gabapentin onset of action differs, treatment usually develops gradually and in stages.
First Few Days
During the first few days, individuals may notice slight improvements in burning, tingling, shooting pain or sleep disturbances.
The significant relief will probably not happen yet. The initial phase of treatment focuses on the adaptation to the drug and checking whether its side effects are acceptable.
After 1–2 Weeks
At this stage, the effect may be more pronounced if the dosage of gabapentin was raised.
Individuals may experience:
- Reduction of the intensity of burning pain
- Fewer instances of shooting or electric-shock pains
- Less nighttime pain
- Improvement in sleep
- Reduced sensitivity to painful stimuli
- The effect is very individual.
- After Several Weeks
A full effect may become visible after several weeks, once the effective and tolerated dose was reached.
That is why gabapentin time to relieve nerve pain cannot be evaluated after one or two doses of the drug.
Why Does Gabapentin Take Time To Relieve Nerve Pain
Gabapentin does not cause a local anesthesia or act like an opioid.
Gabapentin binds the alpha-2-delta subunit of voltage-gated calcium channels. It changes the release of the certain chemical messengers involved in the process of abnormal nerve signaling.
Neuropathic pain happens due to the excessive signaling of the irritated or damaged nerves. Even without new injuries, they generate exaggerated pain signals.
Gabapentin may help in reducing this abnormal signaling, but it takes time.
The second reason for the different speed of gabapentin effect is dose titration. The doctors usually prescribe it starting with a low dose and raising it gradually instead of the immediate prescription of a high dose.
What Types Of Nerve Pain Is Gabapentin Prescribed For?
In the United States, gabapentin is used as a treatment for postherpetic neuralgia. Postherpetic neuralgia is the type of nerve pain that remains after shingles.
Gabapentin for neuropathic pain may be also prescribed clinically for other types of neuropathies, depending on the diagnosis and the healthcare professional's decision.
Neuropathic pain usually differs from the ordinary muscle or joint pain. People may report:
- Burning
- Tingling
- Electric-shock sensations
- Shooting or stabbing pain
- Pins and needles
- Pain from the light touch
- Increased sensitivity
Gabapentin for neuropathy should also be prescribed basing on the correct diagnosis. Not all burning, numb or painful sensations are caused by neuropathy.
What Can Affect The Speed Of Gabapentin Action?
Several factors influence the time when does gabapentin start working for nerve pain.
The underlying disease matters. The postherpetic neuralgia may react differently from the nerve pain resulting from other disease.
Other factors include:
- Severity and duration of the nerve pain
- Starting dose
- Speed of dose increasing
- Renal function
- Age
- Other medications
- Side effects limiting the dose increases
- Individual tolerance to gabapentin
Gabapentin is mainly eliminated via the kidneys. Thus, those with the impaired kidney function require another dosing regimen.
How Do You Know Gabapentin Works?
The complete absence of pain is not always the sign of successful treatment.
More real-life signs of the positive results are:
- Reduction of pain intensity
- Reduction of the number of flare-ups
- Less burning or shooting pain
- Improved sleep due to fewer awakenings from pain
- Increased comfort when walking and moving
These signs can be helpful when evaluating the effectiveness of gabapentin for nerve pain.
Evaluation of pain intensity, sleep and activities over a few weeks may help to spot the gradual improvements.
Why Gabapentin Dose Is Often Increased Gradually
Gabapentin can cause dose-dependent side effects, especially in the beginning of the treatment.
The gradual increase of the dosage can help to minimize such problems as:
- Dizziness
- Sleepiness
- Fatigue
- Unsteadiness
- Impairment of coordination
Gradual titration also allows the prescriber to find a balance between the relief of symptoms and side effects.
The higher dose is not always better, and rapid increase may result in more side effects without any additional pain relief.
What If Gabapentin Does Not Work After Several Weeks?
If gabapentin for nerve pain shows no effect after several weeks, the first question is whether the adequate treatment trial happened.
Healthcare professional will evaluate:
- Consistency of the doses
- Whether the effective dose was reached
- Whether the side effects limited the dose increases
- Renal function
- The original diagnosis
- Other medicines
Whether there is another treatment option that can work better
Do not increase the dose on your own just because the pain remains troublesome.
The dosing regimen of gabapentin can differ widely between individuals, and all changes in it should be done according to medical recommendations.
How To Take Gabapentin Consistently
Take gabapentin according to the schedule specified in the prescription.
Useful tips include:
Take doses at approximately similar times.
Do not miss the doses frequently.
Do not take extra capsules or tablets to compensate for the missed doses unless recommended.
Carefully follow the instructions for the extended-release form.
Discuss with a pharmacist any new medicines or supplements.
Certain antacids containing aluminum or magnesium can reduce the absorption of gabapentin. They should be taken at least 2 hours apart from gabapentin.
Common Side Effects During The First Weeks
Common side effects include:
- Dizziness
- Sleepiness
- Fatigue
- Poor coordination
- Unsteadiness
- Swelling of the legs or feet in some patients
Some side effects may become less prominent as the body adapts.
Until you know how does gabapentin affect you, do not participate in such activities as driving or operating machinery.
Alcohol and other medications that cause sedation can amplify the drowsiness.
Gabapentin can also contribute to dangerous respiratory depression in people who use opioids or other central nervous system depressants, particularly with additional respiratory risk factors.
Can Gabapentin Improve Sleep Before Pain Reduction?
Yes, this can happen.
The nerve pain usually gets worse at night. If gabapentin reduces nighttime burning or shooting pains, the individual can improve the quality of sleep before the pain reduction.
Thus, improved sleep can be one of the first signs of the improvement.
However, the excessive day-time sleepiness is different and needs to be discussed with a healthcare professional if it limits your daily activities.
Why Gabapentin Should Not Be Suddenly Discontinued
Gabapentin is usually not supposed to be suddenly discontinued.
Sudden discontinuation can cause withdrawal-like reactions in some people, including anxiety, insomnia, nausea, sweating, or worsening of the pain. The sudden withdrawal may also increase the seizures' risk, especially in the people who take gabapentin for the seizure disorders.
When treatment needs to be discontinued, healthcare professionals usually decrease the dose gradually.
The schedule of the dose reduction depends on the dose, the duration of therapy, the medical history and the reasons of using gabapentin.
Frequently Asked Questions
Does Gabapentin Work On The First Day?
The significant nerve-pain relief usually takes longer than one dose.
While some individuals may experience early changes, the speed of the gabapentin effect on neuropathic pain is usually estimated over days or weeks rather than hours.
How Long Does Gabapentin Take To Work Fully?
The full effect can take several weeks, especially if the dosage is raised gradually.
The exact time can differ, and there is no single timeline that applies to all.
Why Is My Gabapentin Not Working Yet?
The possible reasons are the early stage of treatment, the ongoing dose titration, missed doses, the cause of the pain, or individual factors.
Your treatment should be evaluated if there is little improvement after an adequate treatment trial.
Does A Higher Dose Of Gabapentin Work Faster?
Not necessarily.
The increase of the dose can quickly increase dizziness, sleepiness, and coordination problems. The dose changes should be managed by a healthcare professional.
How Long Should You Use Gabapentin For Nerve Pain?
The adequate treatment trial usually means allowing the required time for the dose adjustment and further evaluation of benefits and side effects.
The exact duration of the trial may differ, and the prescribing clinician should decide when the trial should be considered long enough.
Can You Stop Gabapentin Once The Nerve Pain Improves?
Do not stop it suddenly just because you feel better.
The healthcare professional can evaluate whether the treatment is still necessary and, if it is appropriate, can provide you with the plan for the gradual dose reduction.
When To Contact A Healthcare Professional?
Contact a healthcare professional if your nerve pain worsens, if there is little improvement after an adequate treatment trial or side effects prevent you from the usual activities.
Contact your doctor or pharmacist especially if you have:
- Severe dizziness or unsteadiness
- Excessive sedation
- New or worsening swelling
- Breathing problems
- Questions regarding missed doses
- Issues coordinating the doses with other medications
- Questions about stopping the treatment
If gabapentin has been prescribed to you for nerve pain, Grant Pharmacy can help to clarify dose timing, precautions with the medication and potential interactions.
The important thing is that gabapentin for nerve pain usually requires patience. Some improvement may happen during the first few days or the first 1-2 weeks, but the full effect can take several weeks, while the dose is gradually increased.
Medical References
U.S. National Library of Medicine, DailyMed – Gabapentin Prescribing Information
https://dailymed.nlm.nih.gov/dailymed/search.cfm?query=gabapentin
U.S. Food and Drug Administration (FDA) – Gabapentinoids and Serious Breathing Problems
https://www.fda.gov/drugs/drug-safety-and-availability/fda-warns-about-serious-breathing-problems-seizure-and-nerve-pain-medicines-gabapentin-neurontin
National Health Service (NHS) – Gabapentin
https://www.nhs.uk/medicines/gabapentin/
MedlinePlus – Gabapentin Drug Information
https://medlineplus.gov/druginfo/meds/a694007.html
NICE – Neuropathic Pain in Adults: Pharmacological Management
https://www.nice.org.uk/guidance/cg173
