Yes, Gabapentin can cause a "Brain Fog". It works by slowing down neurons, and since your whole brain is neurons it will slow it down a bit too. Side effects are drowsiness, dizziness, and fatigue - all of which could be perceived as a brain fog.
It was also shown in clinical trials to cause weight gain in 11% of the population.
Let me know if you have any other questions.
Brian PharmD Candidate
My husband takes 1200 mg of neurotin a day & he has not had the weight problem, but is kind of foggy. He takes it all at once before he goes to bed (against medical advice), & I think that's why he takes it that way. I tried it one time for pain, & couldn't stand the way it made me feel, & that was at the starting dose of 300 mg. Everyone is different & will react differently to meds. I might suggest that if this is for Fibromyalgia, a counter part is the drug Lyrica. It too can make you gain weight, but I did not feel foggy on it. It actually helped the pain so much I felt brainier( is that a word?). Alas I had swelling side effects so couldn't continue. Good luck, & let us know how you are doing.
- Neurontin Information for Consumers
- Neurontin Information for Healthcare Professionals (includes dosage details)
- Side Effects of Neurontin (detailed)
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