. 2011 Mar 10;67(8):847–854. doi: 10.1007/s00228-011-1014-7

Table 1.

The prescribed daily dose (PDD):defined daily dose (DDD) ratios for different antihypertensive drug classes

Drug class (ATC code)	PDD:DDD ratio^a	Patients^b
Drug class (ATC code)	Mean (median)	n
Beta-blockers (C07AB)	0.84 (0.73)	79,772
Thiazide diuretics (C03AA)	1.00 (1.09)	8,782
Dihydropyridine calcium channel blockers (C08CA)	1.51 (1.25)	45,750
Angiotensin-II receptor blockers (C09CA)	1.88 (2.13)	17,714
ACE inhibitors (C09AA)	2.17 (2.04)	72,597

^aPrescribed DDD per patient per day

^bNumber of patients who received the drug continuously (>3 months)