Canadian hemp (Apocynum cannabinum) is a bushy shrub. Its tough bark has been used as a substitute for hemp.
Canadian hemp root contains chemicals that may slow the heartbeat, lower blood pressure, increase the strength of the heartbeat, and increase urine. It may work similarly to the prescription drug digoxin.
People sometimes use Canadian hemp for cough, heart failure, warts, and many other conditions, but there is no good scientific evidence to support these uses. Using Canadian hemp can also be unsafe.
Don't confuse Canadian hemp with hemp, hemp agrimony, gentian, ipecac, or German ipecac. These are not the same.
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