“…Majority of students in this study had unused drugs at their home which is very high than findings of Sirisha et al study where 67% had upto 5 leftover drugs in tablet form in majority of cases while 46.88% had unused drug in study by Shivaraju et al 27,28 Among the reason for possession of unused drugs, self discontinuation was 75% in this study which is comparable to studies by Maharana et al, Sirisha et al, and Osei-Djarbeng. 27,29,30 Our results were far higher than study by Ahmed et al 31 Other reasons like left over from previous OTC, doctor changed the medicines and drug passed expiry date were also there which are at par with other studies. 27,29 Most of the unused drugs kept at home belongs to analgesics (34%) and antibiotics (29%) while few of them had antipyretics (11%), cough syrups (10%), topical formulations (8%) and anti-histaminic (8% In the process of drug development, a new chemical entity is not studied for any deterioration in its efficacy, potency, and safety after proposed expiry date; however, its expiry date is based on stability and sterility studies.…”