Topiramate was effective in improving reexperiencing and avoidance/numbing symptom clusters in patients with PTSD. This study supports the use of anticonvulsants for the improvement of symptoms of PTSD.

The new issue of CNS Neuroscience & Therapeutics includes an article: “A Double-Blind Randomized Controlled Trial To Study the Efficacy of Topiramate in a Civilian Sample of PTSD.”

The authors are Mary S. L. Yeh, Jair Jesus Mari, Mariana Caddrobi Pupo Costa, Sergio Baxter Andreoli, Rodrigo Affonseca Bressan, & Marcelo Feijó Mello.

Method: We conducted a 12-week double-blind, randomized, placebo-controlled study comparing topiramate to placebo. Men and women aged 18 – 62 years with diagnosis of PTSD according to DSM-IV were recruited … 35 patients were randomized to either group. The primary outcome measure was the CAPS total score changes.

Results: 82.35% of patients in the topiramate group exhibited improvements in PTSD symptoms. The efficacy analysis demonstrated that patients in the topiramate group exhibited significant improvements in reexperiencing symptoms: flashbacks, intrusive memories, and nightmares of the trauma (CAPS-B; P= 0.04) and in avoidance/numbing symptoms associated with the trauma, social isolation, and emotional numbing (CAPS-C; P= 0.0001). Furthermore, the experimental group demonstrated a significant difference in decrease in CAPS total score (topiramate 57.78; placebo 32.41; P= 0.0076). Mean topiramate dose was 102.94 mg/d. Topiramate was generally well tolerated.
Comment: this is important, as psychotherapy helps many, but not all people with PTSD, and is often not available for a variety of social and economic factors.