Medicinal use of Cannabis
Cardiovascular Effects of Cannabis
One of the most consistent effects of cannabis intoxication is an increased heart rate[i]. For this reason alone it would not be normally recommended for patients with cardiovascular problems. However, THC also acts as a smooth-muscle relaxant, relaxing the walls of the arteries, which can result in lower blood pressure and increased blood flow to the tissues[ii][iii]. The effect taken together is analogous to a car changing down a gear.
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