Open AccessTime to entry of generic medicines in M alaysia: implications for pharmaceutical cost containment
Author(s) -
Fatokun Omotayo,
Ibrahim Mohamed Izham M.,
Hassali Mohamed Azmi A.
Publication year - 2013
Publication title -
journal of pharmaceutical health services research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.244
H-Index - 15
eISSN - 1759-8893
pISSN - 1759-8885
DOI - 10.1111/jphs.12031
Subject(s) - innovator , expiration date , medicine , expiration , generic drug , product (mathematics) , competition (biology) , medical prescription , pharmacy , marketing , drug , business , pharmacology , family medicine , finance , ecology , chemistry , geometry , food science , mathematics , entrepreneurship , respiratory system , biology
Objectives Generic medicine availability is crucial for maintaining the M alaysian heavily subsidised public healthcare system, and for reducing rising national pharmaceutical expenditure. This paper analyses the time to entry of generic medicines following patent expiration on innovator drug products in M alaysia. Methods This study utilised a robustly constructed dataset of 12 best‐selling single‐entity prescription drug products that experienced loss of patent protection and subsequent generic entry between J anuary 2001 and D ecember 2009. Time to entry was measured as the time lag between expiration dates of basic patent of the innovator active drug substances and marketing approval dates of the first generic equivalents. Patent data of the drug substances were sourced from M alaysian and international patent databases. Marketing approval data of both the innovator and generic drug products were sourced from the product registration databases of the M alaysian drug regulatory authority. Key findings A total of 154 (mean ( M ) = 12.83, standard deviation ( SD ) = 9.61) generic entries occurred during the data period for the entire 12 active drug substances. The mean time to entry (in days) following basic patent expiration was 396.92 ( SD = 507.49). A significant difference was found between the hypothesised time to entry and the study mean time to entry. Conclusions Time to generic entry in M alaysia is significantly delayed beyond the day following basic patent expiration of innovator product, thereby delaying the onset of generic competition with potential negative implications on pharmaceutical expenditure.