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There appears to be an error in the name of your drugs!?
is CCB - a calcium channel blocker
/ 2.5 to 10 mg /
LOSARTAN is ARB - Angiotensin Receptor Blocker
/ 25 to 100 mg /
What is "50/12.5"? - most probably, 50 mg of losartan with 12.5 mg of HYDRO-CHLORO-THIAZIDE.
Hydro Chlor Thiazide is a diuretic
there are 3 different medicines / each from a different class / each acts by different mechanism
Wishing speedy recovery