... I've taken gabapentin for a very short stint about three months ago. I titrated up to 600mg/day and it did alleviate my back pain, however I became forgetful and clumsy and developed a dry cough. When I developed a purple rash on my forearms called it quits, titrated down and ceased to take the drug. All the symptoms quickly abated except for the rash. The purple rash persists to this date, it blooms and ebbs. I can go to sleep with no rash and wake up with a new one in bloom. I've scheduled an appointment with a dermatologist to see what's going on. It could be something else but I believe this rash is due to the drug and it remains once off the drug. If anyone has similar experience please let me know. I'd like to get to the bottom of this as soon as possible