Table 3.

The PDD:DDD ratio^a for different antihypertensive drug classes used either as monotherapy or in combination (two to five drugs)

	Number of prescribed antihypertensive drug classes
Drug class (ATC code)	1	2	3	4	5
Beta-blockers (C07AB)	0.82	0.88	0.94	1.01	1.10
Thiazide diuretics (C03AA)	1.00	1.00	1.01	1.02	1.09
Dihydropyridine calcium channel blockers (C08CA)	1.46	1.56	1.66	1.76	1.85
Angiotensin-II receptor blockers (C09CA)	1.78	2.01	2.22	2.39	2.35
ACE inhibitors (C09AA)	2.04	2.41	2.91	3.35	3.61

^aPrescribed DDD per patient per day