<prompt> A patient has been diagnosed as having long QT syndrome. The patient is experiencing significant pain following a bout with shingles. What would be an appropriate drug for his pain?AmitriptylineFentanylAcyclovirGabapentin  <response>: Its a case of post-herpetic neuralgia. Gabapentin is the drug of choice. Amitriptyline can also be used for pain but it can also cause arrhythmia. 