Tiagabine, marketed as the antiepileptic drug Gabitril®, is used in the treatment of anxiety disorders and neuropathic pain including fibromyalgia. The drug also has been approved by US FDA as an adjunctive treatment for partial seizures in ages 12 and up. This Certified Spiking Solution® is suitable for use in LC/MS or GC/MS applications including forensic analysis, clinical toxicology, prescription monitoring, urine drug testing or pharmaceutical research.