Each drug shows two types of effects, one is useful or wanted therapeutic effect and other is harmful or unwanted secondary effect.

One of the common and known effects of drug is on the central nervous system (CNS) or peripheral nerves which results into disturbances in patient’s memory, sleeping habit and daily biological rhythms.

 The outcome of this review appraised herein will help the workers of this field to understand the drug-induced iatrogenic neurological disorders, neurotoxicity, drug reactions and drugdisease interactions.