Gabapentin side effects
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Common Side Effects of Gabapentin
Gabapentin is widely used to treat neuropathic pain and seizures. The most frequently reported side effects are sleepiness (drowsiness) and dizziness. Other common neurological side effects include fatigue and ataxia (problems with coordination or balance) 257. These effects are usually mild but can impact daily activities, especially with long-term use 57. In both humans and animals, sedation is the most commonly reported side effect, particularly at higher doses .
Less Common and Atypical Side Effects
Gabapentin can also cause less typical side effects. These include increased urinary frequency and, in rare cases, urinary incontinence . Some people may experience behavioral changes, such as agitation, aggression, hyperactivity, or defiance, especially in children with pre-existing behavioral or developmental disorders. These behavioral side effects are usually reversible if the dose is reduced or the medication is stopped .
Serious and Rare Side Effects
Although rare, gabapentin can cause serious side effects. These include:
- Allergic reactions such as angioedema (swelling of the face, lips, or eyes), which may require immediate medical attention .
- Respiratory depression, especially in people with existing respiratory problems or when combined with other medications that suppress breathing 29.
- Increased risk of suicidal thoughts or behaviors, which is a concern with many medications that affect the nervous system .
- Myopathy (muscle weakness) and teratogenicity (risk to unborn babies) have also been reported .
Side Effects in Special Populations
People with kidney disease may need lower doses of gabapentin to avoid side effects, as the drug is cleared from the body by the kidneys . In children, behavioral side effects are more likely if they have attention deficit hyperactivity disorder or developmental delays . In veterinary use, most dogs tolerate gabapentin well, but sedation is the most common side effect, especially at higher doses .
Abuse and Misuse Potential
While gabapentin is sometimes misused, especially to enhance the effects of opioids or for recreational purposes, studies have not found strong evidence of addiction or euphoria with gabapentin itself. Euphoria and addictive potential are more commonly reported with pregabalin, a related drug 79.
Conclusion
Gabapentin is generally considered safe and well-tolerated, with drowsiness and dizziness being the most common side effects. Less common effects include behavioral changes, urinary issues, and rare but serious reactions like angioedema and respiratory depression. Most side effects are mild and reversible, but patients should be monitored, especially if they have other health conditions or are taking high doses.
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Most relevant research papers on this topic
A comprehensive review of the typical and atypical side effects of gabapentin
Atypical side effects of gabapentin, a widely prescribed medication for neuropathic pain, are emerging, highlighting the need for comprehensive exploration of these manifestations.
The safety and efficacy of gabapentinoids in the management of neuropathic pain: a systematic review with meta-analysis of randomised controlled trials
Gabapentinoids are safe and effective in managing neuropathic pain, but more research is needed on their addictive potential.
Can gabapentin help reduce postoperative pain in arthroscopic rotator cuff repair? A prospective, randomized, double-blind study.
A single dose of 300 mg of gabapentin effectively reduced postoperative pain in patients undergoing arthroscopic rotator cuff repair without significant side effects compared to placebo.
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