Open J Psychiatry Allied Sci. 2022;13:94-5. doi: 10.5958/2394-2061.2022.00009.X. Epub 2023 Mar 29.

A case of overdose of fluphenazine decanoate injection.

Saharia B, Ghosh S.


Case description: A 28 years old, married Hindu male from a tea garden community, working as daily wage earner was diagnosed as a case of schizophrenia, paranoid type from psychiatry outpatient department (OPD) of Tezpur Medical College and Hospital (TMCH). He was prescribed with tablet risperidone 6 mg and tablet trihexyphenidyl 4 mg daily, and injection fluphenazine decanoate 25 mg intramuscularly (IM) every 30 days. He came for check-up after 27 days, and clinically and symptomatically he was found to be better. However, on enquiry it was found that by mistake he was given injection fluphenazine decanoate 25 mg on daily basis continuously for 27 days. But there were no signs of extrapyramidal symptoms (EPS) or any other side-effects. He was discharged with tablet trihexyphenidyl 4 mg and was asked to come after 15 days. But on follow up, it was reported that after a few days, the patient suffered from resting tremor of both upper and lower limbs. He was treated in a private hospital and the patient survived. Conclusion: Medical and paramedical staff should take care in prescribing and giving such depot injections.


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