Table 3.

Types of antihypertensive-related drug therapy problems and their causes among patients at the hypertension clinic, MRRH from November 2021 to January 2022.

Type of DTP	Cause of DTP	Frequency n (%)
Needs additional drug therapy	Untreated condition	1 (0.6)
	Synergistic therapy	31 (17.4)
	Others	1 (0.6)
Unnecessary drug therapy	Duplicate therapy	2 (1.1)
Dosage too low	Ineffective dose	41 (23.0)
	Dosing too infrequent	12 (6.7)
Ineffective drug therapy	More effective drug available	5 (2.8)
Dosage too high	Drug interaction	2 (1.1)
	Frequency too short	1 (0.6)
Adverse drug reaction	Undesirable effect	35 (19.7)
	safer drug required due to risk factors	12 (6.7)
	Drug interaction	1 (0.6)
Non-adherence	Cannot afford drug product	18 (10.1)
	Patient forgets to take	9 (5.1)
	Patient prefers not to take	5 (2.8)
	Does not understand instructions	2 (1.1)

DTP, drug therapy problems.