Efficacy and tolerability of calcium channel alpha-2-delta ligands in psychiatric disorders

Matching drugs with anxiolytic properties- but without the potential of inducing dependence or abuse- with clinical manifestations of various affective disorders is a very important challenge for psychiatrists. Although the first line of pharmacologic treatment for anxiety disorders remains antidepressants with serotoninergic properties, calcium channel alpha-2-delta ligands are adjuvant agents which could be useful for augmenting antidepressant agents’ clinical effects. Unfortunately, calcium channel alpha-2-delta ligands efficacy and tolerability are not very well known, due to a lack of large scale, randomized, placebo-controlled trials focused on psychiatric disorders. Data regarding pregabalin and gabapentin pharmacology and clinical effects are reviewed and conclusions with pragmatically impact based on the discovered evidence are formulated accordingly.