Gabapentin can cause a reaction called anticonvulsant hypersensitivity syndrome. This syndrome can be life-threatening. Call your doctor right away if you have a rash, a fever, and swollen lymph nodes.
Gabapentin can cause also cause a severe allergic reaction. Symptoms can include:
- trouble breathing
- swelling of your throat or tongue
Don’t take this drug again if you have ever had an allergic reaction to it before. Taking it a second time after any allergic reaction to it could be fatal (cause death).