<s>[INST] I have been taking 3600mg per day of gabapentin for 6 years with no side effects. I recently developed a red rash on my forehead and cheeks. I have been eating the same foods, taking the same vitamins , and prescription creams do not help it. The rash is hot and itchy. Could I have developed a delayed reaction to gabapentin? [/INST] Hi, it does not seem to be due to gabapentin as you have been taking it for years.I think you need to consult a dermatologist as the lesion is hot and itchy which suggests an underlying inflammation the cause of which should be searched for.take care </s>