Hypotensive hawthorn

Hawthorn is stated to possess cardiotonic, coronary vasodilator, and hypotensive properties. Traditionally, it is used for cardiac failure, myocardial weakness, paroxysmal tachycardia, hypertension, arteriosclerosis, and Buerger s disease. 

Hawthorne Antihypertensives Digoxin Additive hypotension Potentiation of (-I-) inotropic effects... 

Although several references mention that hawthorn in high doses may cause hypotension, arrhythmias, and sedation in humans (1,2,4,5), no substantiate case reports can be located. 

Walker AF, Marakis G, Morris AP, Robinson PA. Promising hypotensive effect of hawthorn extract a randomized double-blind pilot study of mild, essential hypertension. Phytother Res 2002 15 48-54. 

In a randomized trial of type 2 diabetes patients taking prescribed drugs, administration of 1200 mg daily of a 3 1 hawthorn leaf and flower extract for 16 weeks resulted in a moderate decrease in blood pressure with no adverse interactions reported. Prescription drugs being taken by the trial participants were hypoglycemic medications (low-dose insulin, metformin, gliclazide, and "others") and hypotensive medication (ACE inhibitors, calcium channel blockers, P blockers, diuretics, and "others") (Walker et al. 2006). 

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