Publication:

Pattern of adverse drug reactions into psychiatric patients

Background To analyse adverse drug reactions (ADRs) reported in patients prescribed psychiatric medications at tertiary care hospital.

Methods ADRs reported in psychiatric patients between January 2011 to June 2017 were analyzed for demographic details, causal drugs, system organ classification, causality assessment (WHO-UMC criteria and Naranjo’s scale), preventability (Modified Schumock and Thorton’s criteria) and severity (Hartwing scale).

Results A total 4368 ADRs were reported during study period, out of which 658 (15.06%) were in psychiatric patients. The mean age of patients was 38±13.34 years and men (57.3%) were most commonly affected than women (42.7%). The most common causal drug groups were antidepressants (29.48%) followed by antipsychotics (23.12%) which include drug fluoxetine (33.9%) and olanzapine (34.3%) respectively. The most common system involved were central nervous system (32.8%) followed by gastrointestinal system (22.8%). Most of ADRs (42.7%) were observed after one month of therapy and showed possible (77%) causal relation with drug therapy. Majority of ADRs (77.4%) were not preventable and mild in nature (83.3%).

Conclusions ADRs are commonly seen in psychiatric patients. Hence, their monitoring and assessment in these patients who require multidrug and long-term therapy may help improve patient management.