Big foreign makers face heat from generics

Some of foreign-invested pharmaceutical firms, such as Pfizer Korea and Handok Pharm, face an aggressive assault as local firms look to steal market share by launching a number of amlodipine and glimepiride generics to jump-start sluggish sales in the midst of protracted business slump.

Pfizer's Norvasc and Handok Pharm's Amaryl have been regarded as the unstoppable favorite here for years b...