Complex sentence: Dr. Reddy's Para 4 application strategy for generic business received a severe setback when Reddy's lost the patent challenge in the case of Pfizer's drug Norvasc (amlodipine maleate), a drug indicated for the treatment of hypertension and angina.
Split into simpler sentences: Dr. Reddy's Para 4 application strategy for generic business received a severe setback when Reddy's lost the patent challenge in case of Pfizer's drug Norvasc (amlodipine maleate). Amlodipine maleate, the generic version of Pfizer's Norvasc, is indicated for the treatment of hypertension and angina.