Table 6.

Less commonly used antihypertensive plants used in clinical trials.

Herb	Design	Population Size	Condition	Dose	Duration	Effect	Magnitude of change	References
Carthamus tinctorius L	Double-blind, placebo-controlled	92	Mild hypertension	70 mg/day ethanolic safflower extract	12 weeks	No significant SBP or DBP decrease	0.8/1 mmHg	Suzuki et al., 2010
Elettaria cardamomum	Placebo-controlled trial	20	Stage 1 hypertension	3 g cardamom powder (1.5 g capsule, twice a day)	12 weeks	SBP and DBP decrease	19/12 mmHg	Verma et al., 2009
Melothria maderaspatana	Controlled trial	50	Mild hypertension	4% tea leaf powder	45 days	SBP and DBP decrease	23.8/15.5 mmHg	Raja et al., 2007