Abstract
Acute organophosphate poisoning is the most common pesticide poisoning which can be manifested in three unique phases of toxic effects e.g. Acute Cholinergic Crisis, Intermediate Syndrome (IMS), Delayed Polyneuropathy. Looking at the previous cases reports the incidence of Intermediate Syndrome has been reported to be as high as 80%.The present study attempted to report a comparable form of incidences encountered in Emergency Department of BP Koirala Institute of Health Sciences (BPKIHS) in Eastern Nepal. Chlorpyriphos was the commonest compound associated with IMS. Early recognition with plasma acetylcholinesterase level as well as Peradeniya Organophosphorus Poisoning (POP) Scaled score might be useful tool in early diagnosis of Intermediate Syndrome.